Studies of the Early Life History of Atlantic Menhaden in Estuarine Nurseries Part l--Seasonal Occurrence of Juvenile Menhaden and Other Small Fishes in a Tributary Creek of Indian River, Delaware, 1957-58 by Anthony L. Pacheco and George C. Grant SPECIAL SCIENTIFIC REPORT-FISHERIES Na 504 UNITED STATES DEPART^flENlJDF^JHE^mT^ FISH AND WILDLIFE SERVICE UNITED STATES DEPARTMENT OF THE INTERIOR Stewart L. Udall, Secretary FISH AND WILDLIFE SERVICE, flarence F. Pautzke, Commissioner Bureau of Commercial Fishkuies, Donald L. McKeman, D.rcclor Studies of the Early Life History of Atlantic Menhaden in Estuarine Nurseries Part l--Seasonal Occurrence of Juvenile Menhaden and Other Small Fishes in a Tributary Creek of Indian River,Delaware, 1957-58 By ANTHONY L. PACHECO and GEORGE C. GRANT United St?.es Fish and Wildlife Service Special Scientific Report- -Fisheries No. 504 Washington, D.C. April 1965 CONTENTS Page Introduction 1 Description of the creek and sampling locations 1 Materials and methods 2 Species connposition and seasonal occurrence 3 Distribution of principal species 7 Seasonal occurrences of smallest specimens 9 Discussion jq Literature cited ^^ Appendix tables j2 Studies of the Early Life History of Atlantic Menhaden in Estuarine Nurseries Part [--Seasonal Occurrence of Juvenile Menhaden and Other Small Fishes in a Tributary Creek of Indian River, Delaware, 1957-58 By ANTHONY L. PACHECO and GEORGE C. GRANT ABSTRACT Monthly occurrences and size ranges of juvenile Atlantic nnenhaden and other small fishes in a tributary creek of Indian River, Del., are summarized from nearly 800 seine collections made over a 1 5-month period, 1957-58. Fish of 32 families, 48 genera, and 58 species were caught. Atlantic menhaden was the principal spring- fall migrant during this study. The resident fish group was principally composed of three cyprinodont and two atherinid species. Peak catches of migrants were made in March and September and of resident species in November. Summaries of seasonal availability and distribution of species, as well as notes on occurrence of the smallest specimen of each principal species, are included. Sampling problems and similarities of the fish fauna to those described in other estuaries along the Atlantic coast of the United States are discussed. INTRODUCTION The Atlantic menhaden (Brevoortia tyrannus) depends upon the estuarine environment for part of its life cycle (June and Chamberlin, 1959). Larvae and juveniles have been re- ported in nearly every river system along the Atlantic coast of the United States from Maine to Florida (DeSylva, Kalber, and Shuster, 1962; June and Chamberlin, 1959; Mass- mann, Ladd, and McCutcheon, 1952; Raney and Massmann, 1953; Scattergood, Trefethen, and Coffin, 1951; Sutherland, 1963). The Bureau of Commercial Fisheries studied the early life history stages of this species in White Creek, a tributary of Indian River, Del., from April 1957 to June 1958. The purpose was to determine the biotic and abiotic factors that nnight affect the distribution, growth, behavior, survival, and abundance of larvae and juveniles within a single nursery area. Data collected included temperature, salinity, hydrogen ion concentration, phosphate con- Note: Anthony L. Pacheco, Fishery Biologist (Research), Bureau of Commercial Fisheries Biological Laboratory, Beaufort, N.C., and George C. Grant, Department of Ocea- nography, University of Rhode Island, Kingston, R,I., formerly Fishery Biologist (Research), Bureau of Com- merlcal Fisheries Field Station, Millvllle, Del. centration, dissolved oxygen, and plankton volume at eight locations (figure 1). Fishes also were collected. This report summarizes data on the fish collections, including (1) a checklist of species and (2) their seasonal occurrence, distribu- tion, and relative abundance. Comparative data from nearby localities (DeSylva, Kalber, and Shuster, 1962; Schwartz, 1961) are discussed. DESCRIPTION OF THE CREEK AND SAMPLING LOCATIONS White Creek (figure 1) flows northeasterly into Indian River Bay, the small, shallow estuary of Indian River, The surrounding terrain is generally low, nearly featureless, and typical of the middle Atlantic coastal plain. Most of the watershed is farm land, with corn and soybeans the principal field crops. The creek shoreline is mostly in its natural state. Shores have not been extensively cut or filled, and only scattered residential develop- ment has occurred. Landward, the intertidal beach is fringed with the salt marsh cord- grass (Spartina alterniflora) and threesquare (Scirpus americanus), behind which the salt hays (Spartina patens and Distichlis spicata) INDIAN RIVER BAY Figure 1. — White Creek, Del., with sampling locations, and water depth at mean low water in meters. predominate. On higher ground, pines are abxmdant, primarily loblolly (Pinus taeda). We analyzed appropriate aerial maps and used a depth profile survey by field station personnel to determine physiographic features. The creek is 4.7 km. long and drains a water- shed of about 15 km.^. The mean low-water surface area is 1.3 km.^, with 80 percent less than 1 m. in depth (figure 2a). Volume at mean low water amounts to about 1,Z80 m.3, with a mean tidal range of 0.5 m. The mean high-water volume is calculated to be about 1,940 m.3. Intertidal volume amounts to about 34 percent of the mean high-water volume. We established eight sampling locations, or stations, along the length of the creek. Station 1 was located seaward of a broad, gradually sloping, sandy beach, exposed to wave action from the bay. Station 2, located in a cove extending eastward from inside the creek mouth, was characterized by a narrow, sandy bottom inshore, grading to mud offshore. Sta- tions 3 and 4 were located along narrow sand beaches, sloping gradually to a muddy sand bottom. Stations 5 and 6 were near narrow beaches which sloped to a sandy mud bottom. The upper creek stations, 7 and 8, were located adjacent to extensive intertidal flats, and had sticky mud bottoms. Benthic vegetation was abundant seasonally, primarily between stations 2 and 4. The green algae ( Ulva lactuca and Enteromorpha linza) and the red alga (Aghardiella teneraj^ere the principal forms. Since detailed description of hydrographic observations will be the subject of another re- port in this series, we summarized only the general features in this report. Seasonal changes of surface water temperature were similar throughout the creek; monthly means and ranges are shown in figure 2b for each of four zones, formed by grouping two adjacent stations. Salinity varied continuously with changes in tide and season, resulting in a wide range of values. The overall mean and range of salinity at each station are shown in figure 2c. MATERIALS AND METHODS Generally, we collected fish every other day at each station during a 5-day workweek. We used beach seines of different lengths and mesh sizes during the survey. Spring and summer collections were made with a 7.5-m., 6-mm. stretched mesh seine, 1 m, deep; fall and winter collections were made witha 30-m., 12-mm. stretched mesh seine, 1.3 m. deep. A 15-m., 12-mm. stretched mesh seine, 1.3 nn. deep, was used during the first three sampling days of August on an experimental basis. Be- cause of ice cover during winter and early spring, collections were lacking for periods of up to 2 weeks. 0 025 050 0.75 1.00 1.25 AREA IN KILOMETERS 2 40 20 20 (£ io •-20 io 20 STATIONS 1*2 1 ^ y ^-- — -~. y. /"- STATIONS 3*4 / -^ V A f "W "flip 1 1 Nt>tf»* STATIONS 5+e y -T->^ J / ^"H^ , , STATIONS 7+a _y -"V- J y^ 1 1 1 1 1 , , AMJJASONDJFMAMJ 1957 1958 30 O >-20 < •"IO iBBi ( iiiiiiill!!il!ii&^^^^^^^ r'^""^ 0 — 1 — ' — 1 — ' — ; — ■ — ^ I 2 3 4 5 6 7 8 STATIONS Figure 2. — a. Hypsograph (area and depth) of White Creek, Del. b. Monthly average and range of surface water temperature, c. Overall average and range of salinity at survey locations. MHW is mean high water; MLW is mean low water. Individual collections were sorted, species identified and counted, and fork lengths recorded. Common and scientific names fol- lowed American Fisheries Society (1960). At times, many of the smaller anchovies, killi- fishes, and silversides (up to about 10 mm.) passed through the meshes of both nets, and, therefore, their numbers were not recorded in summary tables; however, notes on their occurrences were included. We tabulated the collections by date, time, gear, surface water temperature, salinity, number of Atlantic menhaden, and combined numbers of all other species (append, table 1). Frequency of sampling varied; hence, avail- ability is expressed in units of catch per seine haul. We made some comparisons be- tween the catches of the different nets, but made no adjustment for variation in net ef- ficiency. SPECIES COMPOSITION AND SEASONAL OCCURRENCE Fifty-eight species, representing 48 genera of 32 families, were collected (table 1). The catch, by species and size ranges, is sum- marized for each station, by month, in ap- pendix table Z, A summary of the total monthly catch by species is included as table 2. Various authors (Greeley, 1939; Warfel and Merriman, 1944; Pearcy and Richards, 1962) have classified fishes in seine collections ac- cording to the particular biotope considered. Any system of classification is arbitrary, be- cause detailed information on reproduction and subsequent movements of young is limited or absent for many species. Our classification is similar to that of Pearcy and Richards (1962) and based generally on the seasonal relative abundance of larvae and juveniles. Some dif- ferences of details of their system and ours inevitably occur because of differences in fish fauna, physiography, and hydrography of the streams considered. The following groupings are useful in de- scribing the variation both in number and availability of species in White Creek: I. Nonmigratory 1. Brackish water resident species. -- Those which are hatched in the creek and may reside there throughout life: sheepshead minnow (Cyprinodon variegatus), mummichog (Fundulus heteroclitus). striped killifish (F. majalis), rainwater killifish (Lucania parva), fourspine stickleback (Apeltes quadracus), tidewater silverside (Menidia beryllina), and Atlantic silver- side (M. menidia). 2. Fresh- water species.-- These were in- frequently collected and derived from Table 1 . --Checklist of species collected from White Creek, Del., during survey Dasyatidae - stingrays Bluntnose stingray (Dasvatis savi) Elopidae - tarpons Ladyf ish (Elops saurus) Clupeidae - herrings Blueback herring (Alosa aestivalis) Alewife (A. pseudoharengus) Atlantic menhaden (Brevoortia tyr annus) Engraulidae - anchovies Striped anchovy (Anchoa hepsetus) Bay anchovy (A. mitchilli) Silver anchovy (Anchoviella eurystole) Umbridae - mudminnows Eastern mudminnow (Umbra pygmaea) Cyprinidae - minnows and carps Golden shiner (Notemigonus crysoleucas) Bridle shiner (Notropis bifrenatus) Spottail shiner (Notropis hudsonius) Anguillidae - fresh-water eels American eel (Anguilla rostrata) Belonidae - needlefishes Atlantic needlefish (Strongylura marina) Hemiramphidae - halfbeaks Halfbeak (Hyporhamphus unifasciatus) Cyprinodontidae - killifishes Sheepshead minnow (Cvprinodon variegatus) Banded killif ish (Fundulus diaphanus) Mummichog (F. heteroclitus) Striped killifish (F. maialis) Rainwater killifish (Lucania parva) Poeciliidae - livebearers Mosquitof ish (Gambusia affinis) Gadidae - codfishes and hakes Pollock (Pollachius virens) Gasterosteidae - sticklebacks Fourspine stickleback (Apeltes quadracus) Threespine stickleback (Gasterosteus aculeatus) Syngnathidae - pipefishes and seahorses Spotted seahorse (Hippocampus erectus) Northern pipefish (Syngnathus fuscus) Serranidae - sea basses White perch (Roccus americanus) Pomatomidae - bluefishes Bluefish (Pomatomus saltatrix) Carangidae - jacks, scads, and pompanos Blue runner (Caranx crysos) Crevalle jack (C. hippos) Round scad (Decapterus punctatus) Permit (Trachinotus falcatus) Gerridae - mojarras Spotfin mojarra (Eucinostomus argenteus) Pomadasyidae - grunts Pigfish (Orthopristis chrysopterus) Sciaenidae - drums Silver perch (Bairdiella chrysura) Spotted seatrout (Cvnoscion nebulosus) Spot (Leiostomus xanthurus) Northern kingf ish (Menticirrhus saxatilis) Atlantic croaker (Micropogon undulatus) Black drum (Pogonias cromis) Gobiidae - gobies Naked goby (Gobiosoma bosci) Seaboard goby (G. ginsburgi) Green goby (Microgobius thalassinus) Table 1 .--Checklist of species collected from White Creek, Del., during survey --Continued Triglidae - searobins Bothidae - lefteye flounders Northern searobin (Prionotus carol inus) Summer flounder (Paralichthys dentatus) Striped searobin (P. evolans) Pleuronectidae - righteye flounders Uranoscopidae - stargazers Winter flounder (Pseudopleuronectes americanus) Northern stargazer (Astroscopus guttatus) Soleidae - soles Blenniidae - combtooth blennies Hoechoker (Trinectes maculatus) Striped blennv (Chasmodes bosquianus) Cynoglossidae - tonguefishes Mugilidae - mullets Blackcheek tonguefish (Symphurus plagiusa) Striped mullet (Mugil cephalus) Tetraodontidae - puffers White mullet (M, curema) Northern puffer (Sphaeroides maculatus) Atherinidae - silvers ides Batrachoididae - toadfishes Rough silverside (Membras martinica) Oyster toadfish (Opsanus tau) Tidewater silverside (Menidia bervllina) Atlantic silverside CM. menidia) small, upstream populations: eastern mudminnow (Umbra pygmaea), golden shiner (Notemigonus crysoleucas), bridle shiner (Notropis bifrenatus), spottail shiner (N. hudsonius), banded killifish (Fundulus diaphanus), and mosquitofish (Gambusia affinis). II. Migratory 3. Spring-fall species.- - Migrants which generally enter the creek only during the warm season (most of these use the habitat as a nursery): Atlantic menhaden (Brevoortia tyrannus), striped anchovy (Anchoa hepsetus), bay anchovy (A, mitchilli). naked goby (Gobiosoma bosci), green goby (Microgobius thalas- sinus), striped mullet (Mugil cephalus), summer floxinder (Paralichthys dentatus), winter flounder (Pseudo- pleuronectes americanus), and oyster toadfish (Opsanus tau). 4. Incidental species.-- These occurred erratically in collections. Many un- doubtedly are members of summer popu- lations occurring in other locations within Indian River: silver anchovy (Anchoviella eurystole), halfbeak (Hy- porhamphus unifasciatus), pollock (Pol- lachius virens), threespine stickleback (Gasterosteus aculeatus), spotted sea- horse (Hippocampus erectus), northern pipefish (Syngnathus fuscus), white perch (Roccus americanus), bluefish (Poma- tomus saltatrix), blue runner (Caranx crysos), crevalle jack (C. hippos), round scad (Decapterus punctatus), permit (Trachinotus falcatus), spotfin mojarra (Eucinostomus argenteus), pigfish (Or- thopristis chrysopterus), silver perch (Bairdiella chrysura), spotted seatrout (Cynoscionnebulosus), spot (Leiostomus xanthurus), northern kingfish (Men- ticirrhus saxatilis), Atlantic croaker (Micropogon undulatus), black drum (Pogonias cromis), ^seaboard goby (Gobiosoma ginsburgi), northern stargazer (Astroscopus guttatus), striped blenny (Chasmodes bosquianus), white mullet (Mugil curema), rough silverside (Membras martinica), hog- choker (Trinectes maculatus), and blackcheek tonguefish (Symphurus plagiusa), and northern puffer (Sphae- roides maculatus). 5. Marine species.- -Forms which are known to occur principally in the ocean but occasionally wander into the creek; bluntnose stingray (Dasyatis sayi), lady- fish (Elops saurus), northern searobin (Prionotus carolinus), and striped sea- robin (P. evolans). 6. Diadromous species. --Forms which are migratory between salt and fresh water. No sustaining populations of the river herrings occurred in the creek, but young of two species were seasonally available: blueback herring (Alosa Table 2. —Number of fish collected each month In White Creek, Del., listed by species 1957 1958 Species April Hay June July Aug. Sept, Oct. Nov. Dec. Jan. Peb. Mar. April May June DaBvatis aajr_i - - - 1 - - - - - - - - - - EIops saurue - - - - - - 2 - - - - " " * Alosa aestivalis 1 ~ _ : - - - 1 - - - 3 - - A. pseudoharengus 1 Brevooctia tyrannus 329 13,697 1,637 3,241 1 2,599 12 9,480 12 3,996 1 4 41 26 - - 509 2,605 3,085 Ajichoa hepaetus - A. mitchilli 765 1,186 203 81 234 2,885 963 573 - - - 145 192 1,173 Anchovlella eurystole " " 1 : : - : - - - - - - Umbra pyfimaea - Cyprinids l 1 - 1 - - - - - - - - - AtiKuilla roBtrata 10 40 60 8 8 4 2 - - - 1 18 61 130 Stronevlura marina - - 2 4 10 2 1 - - - - - - - Hyporhamphus unifasciatus - - - - 5 - - - - - - - - 1 CvprinodoQ varieRatuB 47 384 374 259 51 81 986 3.438 890 595 68 266 485 234 504 FunduluB diaphanuB - 1 3 1 1 - 2 - - 1 - - 2 - - F. heteroclttuB 1,257 2,918 2,964 1,750 2,156 2,445 2,804 1,921 91 7 - 97 7,177 4,095 7,270 F. malalis 57 267 190 245 230 553 312 533 41 43 - 21 338 216 483 Lucania parva 22 50 138 403 1,245 120 174 124 202 108 18 32 144 179 428 Gambusla afflnis " " 1 ~ _ : _ . - . - 1 4 - - PollachiuB vlrens - Apeltes (^uadracus - - 15 16 25 1 10 7 14 7 2 8 17 13 90 GaateroBteuB aculeatuB - 6 - - - - - - - - - - " 1 " Hippocampus erectus - - - - - - - 1 - - - - - " ~ Svnenathus fuscus - - 2 10 12 3 6 - - - - - ■ ' 6 RoccuB americanus - 3 2 - - 11 1 - - - - - 5 : * Pomatomus saltatrix 23 Caraox crysos - C. hippoB - - - 20 - 1 1 - - - - - * ~ " Decapterus punctatus - - - 1 - - - " ~ " " ' ' Trachinotus falcatus - - - 1 - - - - - - ' " " " ■ EucinoBtomus auRcnteus - - - - 1 4 14 - - - - - - - - OrthoprlstiB chryaopterus - - - - 2 16 2 - - - - " " ~ ■ Bairdiella chrysura " * _ 148 674 507 1 98 - - - - - - - Cvnoscion nebulosus - Leiostomus xanthuma - 2 - 8 13 23 - - - - - - " " " Mentlclrrhus aaxatilis - - - 1 - 2 - - - - - - - " " Micropogon undulatus - - - - - - 2 3 2 1 - - - - " PoROnias cromia GoblOBoma boscl 2 21 9 1 77 2 128 12 151 14 109 22 18 - - 1 39 26 134 G. ^insburg^i - - - 1 - 1 - - 1 - - - - - " HicroRoblus thalassinus - 3 4 79 369 392 37 7 - - - - 23 11 77 Prionotua carolinus - - - - - - 2 - - - ~ " ~ ' P. evolans - - - - 1 - - - - - - - - " * Astroscopxifl guttatuB - - - - - - - 1 - - - - " ~ ' Chasmodes bosqulanuB - - - - - 2 1 - 3 - - 1 - " " MuRll cephalus 128 41 8 13 16 22 48 5 13 24 - - 826 732 1,177 M. curema - - 125 191 180 187 95 - - - - - ■ " Membras martinica . - - - - 11 - - - - - - " ~ ' Menidia beryllina 1,878 3,820 3,948 1,085 550 2,276 2,319 1,076 80 642 85 957 1,884 1,550 1,860 M. menidia 130 170 683 884 2,065 6,855 5,301 5,475 3,269 5,233 19 938 2,791 32 96 Parallchthys dentatufl - 5 1 1 17 20 13 1 - - - - 9 5 12 Paeudopleuronectes americanuB - - - 4 36 39 32 6 3 2 - 1 6 9 57 Trinectea maculatus - - 1 - - - 1 - - - - " ~ SvmphuruB plaeluBa - - - - - 1 - - - - - " ' 3 Sphaeroldea maculatua - - - 1 1 - - - - - - " * Ops anus tau - 2 1 27 93 71 13 - - - - - 1 " ' aestivalis), alewife (A^. pseudohar engus ), and American eel (Anguilla rostrata). Seasonal fluctuations inthe number of species in the foregoing groups are shown in figure 3. The sharp decrease in number of species from October to February corresponds to a period of rapid cooling. In February, when coldest water temperatures occurred, only resident species were taken in sannples. Warfel and Merriman (1944) described a similar relation between temperature and numbers of species from Morris Cove, Conn.; however, they caught no fish in winter in waters below 4°C, TOTAL - Figure 3. — Seasonal distribution in numbers of species in White Creek, Del. M J fish Two peaks in availability of fish in White Creek were indicated from the seasonal dis- tribution of catches per unit haul (figure 4). An early peak in May consisted principally of Atlantic menhaden. The second peak, in November, was composed almost completely of four resident species (Atlantic and tidewater silver sides, mummichog, and sheepshead min- now). Lowest level of availability occurred in February, coincident with minimum water temperatures. The dominance of Atlantic men- haden among spring-fall migrants is obvious when the abundance of Atlantic menhaden shown in the upper part of figure 4 is compared with abundance of all spring-fall migrants shown in the lower portion. The change in length of seines employed should be considered in interpreting figure 4, The 7.5-m. seine was used from April to September, and the 30-m. seine from late fall to early spring. Thus, the September peak of Atlantic menhaden probably results from im- proved net efficiency rather than from in- creased abundance. Also, some increase in availability may have occurred as the fish grouped into larger schools prior to emigration. AMJJASONOJFMAMJ Ip5l2el ».l 68l52 I I II I I I I l40l .p l7;i„ I ,2 I I I 12 I I 86 I 63 I 30 I 30 I 32 I 8 I 24 [ 44 I a I 82 I 30m NUMBER OF HAULS SEINE 400 300- 200- 3 < I 100 < 400 i •i !i ; i RESIDENT SPRING-FALL- _. - — .' i - 300 - .' i .' i f i f i ' i 1 i ' i 1 i 1 - 200 - .' i > i 1 j .• /' « ' A A ' 1' \ i 7\ / A \ i \ i V 100 7- -^ / ' ' \ \ i \ 1 1. / / ; • V / \ V \ 1 * / / / / /- \ \ \ 1; / n ■1 .•' ,.-•- i -^- i '*'*— / / -.!._ 1 / 1, A M 1957 S 0 N D J F M A M 1958 Figure 4. — Seasonal abundance of fishes in White Creek, Del., indicated from the average monthly seine catches. DISTRffiUTION OF PRINCIPAL SPECIES Seasonal variation in the relative abundance of the principal species occurring in the fore- going arbitrary groups is shown in figure 5 5 10 50 100 500 APRIL-JUNE, 1957 1*2 lllllNItlllll mill KM IIIMII « U ff tyronnus, A mitchilli F heferodifus, M berylllna 3»4 iiiiiiiiiiiii illllll IIIIIIIIIIIII tf» V Mcarema A mitctn/li^ B tyf annas M. beryl Una 5*6 miiiiiiitii ^:iii iiiiiiimiii Hill miiiiii M.curema B tyronnus M. heryllino, F heteroclitus A rostrata ^♦8 IIIIIIIIIIIII mill IIIIIIIIIIIII Mill iiiiiiiiii B tyronnus M berylllna, F tieterocJitus 1*2 iiiiiiiiiiiiii mill i^i^^^it'^i^i.^i^* Ri^a^i«ae^ d!^ immiiiiiiiiiiimiiiiii 3t4 7^8 ti II I "iL"ii'liL' 'ill 111' 111' liiitil' 111 B. chrysuro B. tyronnus M mffnidio B chrysuro, M curemo 8 tyronnus, A mitchilli M menidio JULY- SEPTEMBER, 1957 B cfirysaro, M curema 8 tyronnus F heteroclifus, M menkfia, H berylllna B. cbrysuro 8 tyronnus F heteroclitus, Mberylltno immimiiii Illllll iiiiimiiiiiL mini IIIIIIIIIIIIII 7*8 iimmmiiiiiiiiii miiimimiiiimqiimm OCTOBER- DECEMBER, t957 M curemo A mitchilli M menidio M curemo A mitchilli, 8 tyronnus M: menidio B. chrysuro, M. curemo 8 tyronnus M menidio, F heteroclitus, Mberylllno M. curemo B tyronnus C voriegotus, F heteroclitus, M menidio, M.beeylliita JANUARY- MARCH, 1958 1.2 Illllll V!w:i « cephalus F heteroclitus, L porva 3*4 IIIIIIIIIIIII 8. tyronnus, M cepholus M menidio 5«6 Ktf>Va S« ^«#S« K» » M menidio 7*8 «-.^. I^PV^ "' zm. M menidio l»2 5t6 IIIIIIIIIIMI Illllll llllllllll Ihlllllllllllllllll mill iiiiiiiiiiiir IIIIIIIIIIIIII mil iiiiiiiiiiiiiniiiii iiiiiiiiiiii APRIL-JUNE, 1958 8 tyronnus. M cepholus r neferocnttjs, M. beryllina M curemo U cepttalus. 8 tyronnus, A. mfchllli F /teterodifus, Uberytlttto U curetito 8 tyronnus r fteteroclttus, Mberylltno A. rostrate hi curemo 6 tyronnus F netefoctftus I 5 10 50 100 500 TOTAL CATCH PER UNIT EFFORT DIADROMOUS ^^^ INCIDENTAL '^KXiti SPRING-FALL " RESIDENT ;«««< Figure 5. — Total catch per seine haul, by 3-month intervals, of principal species groups occurring in White Creek, Del., plotted on a logarithmic scale. Listed species made up about two-thirds of each group catch. Where two or more species are included, listing is in the order of decreased availability. (catches of each two adjacent stations were combined). A small number of species con- stituted at least two-thirds of each group total and varied between seasons and stations. Several species, including the Atlantic men- haden, sheepshead minnow, mummichog, and tidewater silverside, demonstrated a seasonal upstream preference. These contrasted with a fairly uniform distribution of most other species. Incidental species were regarded as strays from outside the creek. Although at times they occurred throughout the creek, incidental species appeared mostly at down- stream stations. Change of species composition within groups generally was graded smoothly over the length of the creek; however, the lumping of species by station groups in figure 5 suggests some discontinuity. For example, the principal resi- dent species shifted from silversides to killi- fishes upstream during summer and fall. On the other hand, there was an apparent irregularity in the distribution of the mummichog, rainwater killifish, and fourspine and threespine stickle- backs (append, table Z). This irregularity oc- curred at station 2 where, although salinities corresponded to those of lower White Creek, a small tributary entered the cove and habitat characteristics were similar to those in upper White Creek. Species predominating within certain groups changed seasonally. The Atlantic silverside Table 3, —Coefficients of association between the six most abundant species, by Cole's Index. Value scale extends from +1 (perfect association) to -1 (perfect disassociat ion) Cvprinodon Brevoortia Fundulas Menidia Anchoa Menidia variegatus tvrannus heteroclitus beryllina mitchilli menidia £. varieKatus 0.209 0.075 0.063 -0.105 -0.155 B. tyrannus 0,209 — . 531 .592 .298 .127 F. heteroclitus .075 . 531 ___ .394 .318 -.104 M. beryllina .063 .592 .394 — .370 .026 A. mi t ch i 1 1 i -.105 .298 .318 .370 — _ . 122 M. menidia -.155 -.127 -.10-4 .026 .122 _-_ from late spring until the following early spring gradually displaced the tidewater silverside (figure 5). Atlantic menhaden generally re- mained the principal spring-fall migrant, but downstream was replaced by the bay anchovy during late fall and early spring. The catch-per-unit-effort, by species, during 3-month intervals, is summarized in appendix table 2. In addition, the monthly catch of all species, with corresponding range in fork lengths, is listed by station in appendix table 3, The occurrences of the principal species appear to be related. Interspecific association CvDrlnodon vonegatus >. Figure 6. — Interspecific association between the six most abundant species occurring in White Creek, Del. Solid lines indicate positive association; broken lines, nega- tive association. of the six most abundant species was deter- mined from 820 samples in 2 x 2 contingency tables and Cole's Index (Cole, 1949, 1957). This coefficient indicates what proportion of the association possible was actually found within the series of collections. Range of coefficients may vary from +1 when species occur together as many times as possible, to - 1 when species occur together the minimum number of times. Coefficients (table 3) ranged from 0.592 to -0.1 27. The relative occurrence is diagrammed in figure 6. Chi-square values resulted in probabilities =0.15 for M. menidia paired with M. beryllina and F. heteroclitus. All other P values were less than 0.5, indicating association coefficients were statistically significant. SEASONAL OCCURRENCES OF SMALLEST SPECIMENS The sequence in availability of the smallest specimens taken (table 4) provides a clue to spawning time of the various species in local waters. Of the clupeid fishes collected, only the Atlantic menhaden occurred in larval stages. Although the smallest Atlantic men- haden (22 mm.) occurred in May, their first appearance was made in collections during Novennber. The greatest number of species in the list of small specimens were available in late spring; however, the smallest cyprinodont larvae (10 mm.) were collected from June to August. This group included important resi- dents: the mummichog, striped killifish, sheepshead minnow, and rainwater killifish. Table 4. — Size and month of collection of smallest specimens for the most abundant species Common name Fork length Month mm. Pollock 39 March American eel 50 April Summer flounder 23 April Atlantic menhaden 22 May Fcurspine stickleback 19 May Bluefish 39 May Spot 48 May Atlantic silverside 8 May Winter flounder « May Bay anchovy 12 June Sheepshead minnow 10 June Mummichog 10 June Striped klllifish 15 June Rainwater kLllifish 13 June Northern pipefish 41 June Tidewater silverside 10 June Naked goby 11 July Green goby 8 July White mullet 20 July Silver perch 7 August Striped mullet 22 November Atlantic croaker 16 December DISCUSSION Seasonal and spatial trends in the distribution of fishes are evident; however, synoptic dif- ferences in availability are difficult to evaluate because of variations in sampling gear. Change in length of netfrom 7.5 m. to 30 m. in Septem- ber did not increase the number of species sannpled (figure 3), but the possible increased efficiency, reflected by higher catches, prob- ably accounted for the September peak in catch-per-unit-effort (figure 4). DeLacy and English (1954), sampling along an exposed shore, experienced a consistent and innpressive increase in diversity of species and in numbers caught, with a 120-ft. seine as connpared with replicate hauls of a 60-ft. seine. In a small tributary, with shores converging upstream, a valid coefficient of relative seine efficiency, applicable to all species involved, is difficult to obtain. For example, from seine collections made on 13 sampling dates from July 13 to August 26, the following sequence of catch per haul of Atlantic silversides and men- haden was made in lower (station 1-3) and upper (station 4-6) creek areas (table 5). Unfortunately, we did not attempt a concen- trated effort to connpare efficiencies of the different gear in the same day and in the sanne area. Table 5. --Comparative catch per Seine haul of A'^lantic silversides and Atlantic menhaden by different nets Seine Atlantic silverside Atlantic menliaden Sampling length period Hauls Sta. 1-3 Sta. 4-6 Sta. 1-3 Sta. 4-6 a- No. 7.5 10.0 2.0 0.0 2.1 7/12-22 12 30.0 59.7 23.3 201.3 390.7 7/26-29 6 15.0 23.3 13.1 2.4 6.2 0/2-9 9 30.0 66.= 37.3 101.1 05.3 8/12-26 12 The Atlantic silverside catch appeared to be related fairly closely to the length of net used. For Atlantic menhaden, the 30-m. net was considerably more effective than either the 7.5-m. or 15-m. length. In lower creek stations the 7.5-m. net appeared to be connpletely in- efficient for menhaden. Aside fronn sweep area of a seine, variable factors, such as schooling behavior, distribution, and size of fish, ob- viously must be considered in making seining efforts productive. We made the changeover to a 30-m. seine on this basis, returning to the 7.5-m. net the following spring to pre- vent the decin-iation of larvae through ex- cessive catches. These data tend to corroborate the con- clusion of Allen, DeLacy, and Gotshall (1960) that efficiency of gear for one species in one area does not imply equal efficiency for the same species in another area. Despite the limitations of sampling, it is evident that White Creek is an important nursery, both for summer nnigrants and resi- dent species. In this respect it is similar to larger tributaries. Comparison of species checklists of DeSylva, Kalber, and Schuster (196Z) and Schwartz (1961) with that of the present study indicated 40 species in common with Delaware Bay, and 29 with Chincoteague and Sinepuxent Bays, Md., and 21 species common to all three locations. Differences in the fish fauna of White Creek and Delaware Bay resulted mainly fronn the variety of fresh- water species in Delaware Bay and the occurrences of incidental species in White Creek. Chinco- teague and Sinepuxent Bays are essentially tidal 10 lagoons and, consequently, have proportionately more marine forms. Except for regional dif- ferences which influence the occurrence of in- cidental forms, fish species in White Creek were remarkably similar to those found in Mystic River, Conn., by Pearcy and Richards (1962). The conspicuous absence of Atlantic menhaden in Mystic River summer migrant population, however, may be related to the types of sampling gears employed. Short seines, beam and otter trawls, and hooks do not effectively catch menhaden. At present, there appears to be active interest in utilizing much more of the White Creek shoreline for residential development. This will involve creek bottom dredging, marsh filling, and shore bulkheading. The present study may prove useful in evaluating ecological effects of such actions upon the future fish populations of this nursery area. LITERATURE CITED ALLEN, GEORGE H., ALLAN C. DELACY.and DANIEL W. GOTSHALL. 1960. Quantitative sampling of marine fishes--a problem in fish behavior and fishing gear. In E. A. Pearson (editor). Proceedings of the first international conference on waste disposal in the marine environment, p. 448-511. Per- gamon Press, New York. AMERICAN FISHERIES SOCIETY. 1960. A list of common and scientific names of fishes from the United States and Canada. Zd ed. Spec. Publ. Z, 102 p. COLE, LAMONT C. 1949. The measurement of interspecific association. Ecology 30:411-424. 1957. The measurement of partial inter- specific association. Ecology 38: 226-233. DELACY, ALLAN C, and THOMAS S. ENG- LISH. 1954, Variations in beach seine samples caused by net length and repeated hauls. Ecology 34:18-20, DESYLVA, DONALD P., FREDERICK A. KAL- BER, JR., and CARL N. SHUSTER, JR. 1962. Fishes and ecological conditions in the shore zone of the Delaware River estuary, with notes on other species collected in deeper water. Univ. Del., Mar. Lab. Inform. Ser. Publ. 5, 164 p. GREELEY, J. R. 1939. Fishes and habitat conditions of the shore zone based upon July and August seining investigations. In A biological survey of the salt waters of Long Island, 1938, p. 72-91. No. 15, Pt. 2.Suppl.28th Annu. (1938). N. Y. Conserv. Dep. JUNE, FRED C, and J. LOCKWOOD CHAM- BERLIN. 1959. The role of the estuary in the life his- tory and biology of Atlantic menhaden. Proc. Gulf Caribbean Fish. Inst. 11th Annu. Sess. (1958), p. 41-45. MASSMANN, W. H., E. C. LADD, and H. N. McCUTCHEON. 1952. A biological survey of the Rappahan- nock River, Virginia. Va. Fish. Lab. Spec. Sci. Rep. 6, 221 p. PEARCY, WILLIAM G., and SARAH W. RICH- ARDS 1962. Distribution and ecology of fishes of the Mystic River estuary, Connecticut. Ecology 43:248-259. RANEY, EDWARD C, and WILLIAM H. MASS- MANN. 1953. The fishes of the tidewater section of the Pamunkey River, Virginia. J. Wash. Acad. Sci. 43:424-432. SCATTERGOOD, LESLIE W., PARKER S. TREFETHEN, and GARETH W. COFFIN. 1951. Notes on the size of menhaden taken in Maine during 1949, Copeia 1951 (l):93-94. SCHWARTZ, FRANK J. 1961. Fishes of Chincoteague and Sinepuxent Bays. Amer. Midland Natur, 65:384-408. SUTHERLAND, DOYLE F. 1963, Variation in vertebral numbers of juvenile Atlantic menhaden. U.S. Fish Wildl. Serv,, Spec, Sci, Rep, Fish. 435, 21 p, WARFEL, HERBERT E., and DANIEL MERRI- MAN. 1944. Studies on the nnarine resources of southern New England. I. An analysis of the fish population of the shore zone. Bull. Bingham Oceanogr. Collect. 9 (Art. 2), 91 p. MS #1397 11 Appendix table l.--Statlonfl occupied, with sa illnlty and temperature data, numbers of Atlantic menhaden and of all other fishes collected; White Creek, Del., 1957-58 Date Sta- Time Seine Salin- Temper- Menha- Other Date ota- Time Seine Salin- Temper- Menha- Other tion length ity ature den fishes tlon length ity ature den fishes E.s.t. K. P.p.t. °C. Number Number E.B.t. M. P.p.t. "c. Number Number 4/15/57 1 1010 7.5 29.1 8.2 0 3 5/13/57 1 0915 7.5 28.9 2075 0 25 2 1030 7.5 26.2 9.4 0 3 2 0935 7.5 27.1 21.3 1 188 3 1040 7.5 25.6 10.6 — 3 0955 7.3 26.4 21.8 0 323 4 1050 7.5 19.3 10.8 — — 4 1020 7.5 26.0 22.7 0 39 5 UOO 7.5 13.9 11.2 0 33 5 1040 7.5 23.9 23.7 1,146 46 6 1115 7.5 14.2 11.9 0 74 6 7 1105 1145 7.3 7.5 20.1 18.8 24.5 26.1 570 20 112 172 4/17/5' 1 0950 7.5 26.6 11.0 0 0 2 1000 7.5 23.0 11.4 0 0 5/15/57 1 0810 7.3 28.9 21.0 0 27 3 1010 7.5 21.9 12.4 0 29 2 0835 7.3 27.5 22.7 1 170 4 1025 7.5 19.7 12.7 0 12 3 0900 7.5 26.9 23.2 0 33 5 1035 7.5 19.0 13.2 4 167 4 0920 7.5 24.7 24.2 25 105 6 1110 7.5 20.6 14.0 30 447 5 6 0940 1000 7.3 7.5 21.9 22.3 24.5 25.3 487 717 26 112 4/19/57 1 2 1015 1030 7.5 7.5 26.5 27.3 15.4 13.4 0 0 30 124 7 1015 7.5 19.2 25.7 206 60 3 1050 7.5 23.8 16.4 0 17 5/17/57 1 0835 7.5 28.8 19.8 0 41 4 1100 7.5 23.4 16.3 0 8 2 0900 7.5 27.9 19.9 0 147 3 1115 7.5 21.8 16.3 1 22 3 0925 7.5 27.6 20.7 0 63 6 1130 30.0 19.6 16.7 171 138 4 0945 7.5 25.5 20.7 0 102 7 1150 30.0 16.5 17.0 2 284 5 6 1000 1015 7.5 7.5 24.0 21.7 20.8 21.0 200 220 87 294 4/22/57 1 2 1000 1015 7.5 7.5 27.3 26.5 18.8 19.0 0 0 14 317 7 1035 7.5 19.2 21.6 800 40 3 1035 7.5 24.7 20.7 0 124 5/20/57 1 0910 7.5 28.3 18.0 0 41 4 1055 7.5 21.3 20.2 0 22 2 0930 7.5 27.8 17.9 0 31 5 1110 7.5 16.8 19.9 3 129 3 0945 7.5 27.4 18.3 0 25 6 1130 7.5 15.4 20.5 14 109 4 5 1005 1020 7.5 7.5 24.1 19.0 18.5 18.4 19 124 39 138 4/24/57 1 1010 7.5 26.1 20.7 0 2 6 1040 7.5 17.2 18.2 2,080 68 2 1030 7.5 25.1 19.4 0 16 7 1100 7.5 14.7 18.2 1,744 131 3 1040 7.3 23.7 21.7 0 143 8 1125 7.5 12.0 18.6 767 39 4 1100 7.5 20.0 23.1 0 60 5 1120 7.5 11.1 23.6 0 337 5/22/57 1 1010 7.5 29.1 16.0 0 18 6 1130 7.5 5.5 24.0 0 254 2 1035 7.5 28.0 13.7 0 71 7 1150 7.5 5.2 25.7 3 55 3 4 1100 1125 7.3 7.5 26.5 24.0 16.4 17.4 0 2 37 187 4/26/57 1 1020 7.3 27.1 19.1 0 8 5 1145 7.5 18.6 17.8 42 71 2 1050 7.5 26.6 20.7 0 173 6 1210 7.5 17.4 18.2 98 171 3 1115 7.5 25.6 21.0 0 40 7 1230 7.3 16.9 19.3 2,157 122 4 1135 7.3 22.0 22.2 0 602 5 1155 7.3 15.4 23.0 170 314 5/24/57 1 0830 7.3 28.4 22.1 0 59 6 1225 7.5 10.2 24.2 97 169 2 0935 7.3 26.4 23.3 1 188 7 1303 7.3 4.9 25.5 2 57 3 4 0945 1010 7.5 7.5 26.7 24.3 23.2 23.9 0 200 106 142 5/1/57 1 0950 7.5 27.0 20.6 0 25 5 1035 7.3 23.9 25.1 42 76 2 1013 7.5 26.1 19.6 0 28 6 1055 7.5 20.4 26.1 54 133 3 1030 7.5 26.1 20.7 0 50 7 1120 7.5 18.2 28.1 28 77 4 1050 7.5 24.6 21.3 0 47 5 1120 7.5 20.9 22.7 20 182 5/27/57 1 1045 7.5 28.6 24.6 0 49 6 1133 7.3 21.8 22.7 0 95 2 1100 7.5 27.3 24.9 0 52 7 1145 7.5 19.7 23.9 44 263 3 4 1115 1140 7.3 7.5 27.1 25.5 25.5 26.1 0 0 136 92 5/3/57 1 0910 7.5 27.8 14.9 0 1 5 1155 7.5 21.7 26.6 8 125 2 0930 7.5 27.1 14.5 0 24 6 1210 7.3 20.5 27.0 92 107 3 0950 7.5 26.7 16.5 0 102 7 1225 7.5 15.8 27.7 21 57 4 1010 7.5 24.9 16.7 0 7 5 1025 7.5 24.2 16.6 0 53 5/29/57 1 0910 7.5 29.2 21.5 0 62 6 1040 7.5 22.9 16.5 1 2 2 0925 7.5 28.1 21.1 0 58 7 1100 7.5 22.6 16.7 0 10 3 0943 7.5 28.1 21.8 0 29 8 1215 7.5 21.0 17.6 4 62 4 5 1000 1040 7.5 7.5 26.0 24.2 21.8 22.4 1 9 153 175 5/6/57 1 0930 7.5 27.6 16.3 0 1 6 1105 7.5 21.6 22.8 2 74 2 0945 7.5 27.0 15.2 0 90 7 1125 7.5 20.1 23.1 125 87 3 1010 7.5 26.9 16.5 0 44 8 1215 7.5 14.0 23.4 141 111 4 1025 7.5 23.5 17.8 0 134 5 1045 7.5 17.1 17.9 82 217 5/31/37 1 0915 7.5 29.6 20.7 0 14 6 1115 7.5 16.3 18.1 20 103 2 0950 7.5 28.9 21.9 0 69 7 1130 7.5 11.4 18.2 1 78 3 4 1015 1035 7.5 7.5 28.6 27.0 22.2 22.9 0 0 25 16 5/8/57 1 0910 7.5 26.3 17.9 0 56 5 1100 7.5 25.6 23.6 2 91 2 0940 7.5 24.9 17.6 0 276 6 1120 7.5 22.6 24.4 5 85 3 1010 7.5 22.6 18.7 0 44 7 1140 7.5 20.5 25.5 16 45 4 1020 7.5 23.8 21.4 0 73 8 1200 7.5 17.7 25.9 9 31 5 1045 7.5 17.2 21.8 106 87 6 1255 7.5 14.2 27.9 206 120 6/3/37 1 0825 7.5 29.0 22.3 0 24 7 1330 7.5 15.6 27.3 117 49 2 3 0850 0920 7.5 7.5 29.2 28.9 23.8 23.3 0 1 315 336 5/10/57 1 0825 7.5 26.6 19.9 0 68 4 0955 7.5 26.7 23.4 4 33 2 0850 7.5 25.0 20.3 0 151 5 1015 7.5 24.7 22.9 0 136 3 0915 7.3 24.1 20.8 55 49 6 1035 7.5 22.9 22.5 0 26 4 0935 7.5 24.3 21.6 0 173 7 1050 7.3 21.7 22.2 454 25 5 0950 7.5 20.4 22.2 245 194 8 1105 7.5 17.1 21.8 0 131 6 1025 7.5 15.4 23.5 5 137 7 1045 7.5 9.8 24.5 0 126 12 Appendix table I. --Continued Date Sta- Time Seine Salin- Temper- Henha- Other Date Sta- Time Seine Salin- Temper- Menha- Other tion length ity ature dea flshee tion length ity ature den fishes E.s.t. H. P.p.t. "c. Number Number E.s.t. H. P.p.t. °C. Number Number 6/5/57 1 0830 7.5 29.3 20.0 0 78 6/28/57 1 0755 7.5 30.5 2473 0 601 2 0855 7.5 28.1 20.3 0 171 2 0810 7.5 29.6 25.9 0 347 3 0920 7.5 27.3 20.6 0 103 3 0830 7.5 28.6 26.4 0 11 4 0950 7.5 21.3 20.0 0 109 4 0845 7.5 26.6 27.0 0 43 5 1010 7.5 17.5 20.1 0 181 5 0910 7.5 25.6 27.6 0 23 6 1030 7.5 11.5 20.1 1 110 6 0930 7.5 24.3 28.0 92 8 7 1055 7.5 8.9 20.6 5 84 7 0945 7.5 23.6 28.6 0 15 8 1130 7.5 6.7 20.1 36 89 8 1000 7.5 21.7 28.7 1 59 6/7/57 1 0855 7.5 26.5 20.7 0 80 7/1/57 1 0830 7.5 30.6 — 0 3 2 0935 7.5 21.2 21.4 1 13 2 0950 7.5 30.2 — 0 10 3 0950 7.5 21.3 21.9 11 105 3 0925 7.5 29.7 — 143 17 4 1030 7.5 24.3 22.5 0 77 4 1010 7.5 26.8 25.2 0 22 5 1055 7.5 13.3 23.3 5 132 5 1020 7.5 25.9 25.7 0 12 6 1120 7.5 6.1 24.3 0 163 6 1035 7.5 25.5 26.0 0 75 7 1210 7.5 4.5 26.3 1 39 7 1100 7.5 23.3 26.2 2 30 8 1300 7.5 2.3 27.4 75 208 8 1125 7.5 24.1 26.5 9 28 6/10/57 1 0925 7.5 28.1 19.0 0 12 7/3/57 1 0830 7.5 31.5 24.2 0 40 2 0935 7.5 27.1 19.6 0 4 2 0855 7.5 29.7 24.5 0 102 3 1000 7.5 26.2 19.9 0 58 3 0920 7.5 29.2 24.8 0 65 4 1025 7.5 23.4 20.1 0 46 4 0940 7.5 28.1 25.1 0 20 5 1040 7.5 16.4 20.5 70 66 5 1020 7.5 25.9 25.7 0 41 6 1100 7.5 13.2 21.4 7 12 6 1035 7.5 24.9 26.0 0 56 7 1115 7.5 10.4 21.6 0 53 7 1055 7.5 23.7 26.2 2 15 8 1140 7.5 6.2 21.7 0 59 8 1110 7.5 19.4 27.4 0 18 6/12/57 1 0800 7.5 28.0 21.7 0 45 7/5/57 1 0820 7.5 30.7 25.5 0 74 2 0825 7.5 26.4 22.2 10 37 2 0960 7.5 30.1 25.5 0 49 3 0845 7.5 24.8 22.9 1 62 3 0935 7.5 28.9 26.0 0 65 4 0920 7.5 22.2 23.8 8 139 4 1005 7.5 27.7 26.3 106 31 5 0945 7.5 20.4 24.3 3 47 5 1040 7.5 25.0 27.5 12 44 6 0955 7.5 19.1 24.5 0 7 6 1120 7.5 20.0 28.7 8 54 7 1010 7.5 16.7 25.2 0 12 7 1150 7.5 16.3 29.5 0 99 8 1020 7.5 12.1 25.6 31 65 8 ~ 7.5 — — — — 6/14/57 1 0808 7.5 28.2 23.7 0 40 7/8/57 1 0830 7.5 30.3 25.1 0 42 2 0830 7.5 26.3 25.2 0 30 2 0850 7.5 29.7 26.2 0 113 3 0850 7.5 25.4 25.8 0 63 3 0920 7.5 28.9 26.6 0 42 4 0920 7.5 24.1 26.4 0 14 4 0950 7.5 28.6 28.0 0 59 5 0950 7.5 22.0 28.1 0 44 5 1015 7.5 25.4 28.6 1 76 6 1010 7.5 21.2 28.2 1 10 6 1035 7.5 24.2 28.1 0 70 7 1025 7.5 20.7 28.7 0 14 7 1055 7.5 21.3 29.6 0 72 8 1045 7.5 16.0 29.3 0 58 8 1115 7.5 13.8 29.9 0 184 6/17/57 1 0905 7.5 28.4 28.1 2 44 7/10/57 1 0805 7.5 30.3 23.4 0 8 2 0930 7.5 27.9 28.8 0 135 2 0820 7.5 30.1 23.3 0 19 3 1015 7.5 27.4 30.4 3 174 3 0835 7.5 29.8 24.8 1 26 4 1100 7.5 24.7 31.6 0 71 4 0855 7.5 28.5 26.2 1 20 5 1120 7.5 23.7 32.2 0 316 5 0935 7.5 27.5 27.9 0 43 6 1145 7.5 20.9 33.3 0 172 6 0950 7.5 26.0 26.7 1 22 7 1215 7.5 19.5 35.5 1 45 7 1005 7.5 25.1 27.4 0 33 8 1235 7.5 16.8 35.8 0 95 8 1025 7.5 22.0 27.3 0 77 6/19/57 1 0805 7.5 28.7 27.9 9 50 7/12/57 1 0810 7.5 31.0 24.0 0 46 2 0830 7.5 28.3 28.4 14 88 2 0830 7.5 30.7 23.8 0 40 3 0850 7.5 27.5 29.4 6 52 3 0855 7.5 29.8 24.6 0 119 4 0915 7.5 26.3 30.5 42 136 4 0920 7.5 29.1 25.3 0 12 5 0945 7.5 22.6 31.0 0 136 5 0950 7.5 27.7 25.6 0 39 6 1010 7.5 20.2 31.6 0 274 6 1010 7.5 26.0 26.7 1 39 7 1035 7.5 17.9 32.2 76 84 7 1025 7.5 25.1 27.5 0 42 8 1055 7.5 12.4 33.5 0 43 8 1050 7.5 18.7 26.8 0 40 i/l^/il 1 0810 7.5 29.4 26.4 0 63 7/15/57 1 0825 7.5 30.1 26.0 0 37 2 0835 7.5 28.3 26.3 0 145 2 0845 7.5 30.1 26.7 2 12 3 0900 7.5 28.2 27.3 0 44 3 0910 7.5 29.8 27.7 0 49 4 0920 7.5 26.7 27.6 0 62 4 0935 7.5 28.5 28.2 9 11 5 0935 7.5 23.1 28.3 0 466 5 0955 7.5 27.7 28.5 0 64 6 0955 7.5 18.1 28.8 124 64 6 1015 7.5 26.6 28.7 0 17 7 1015 7.5 14.9 29.6 64 54 7 8 1030 1050 7.5 7.5 26.2 24.3 29.7 30.1 0 0 25 6 fi/2l>/51 1 0845 7.5 29.0 27.0 0 41 2 0905 7.5 28.1 26.9 251 47 7/19/57 1 0825 7.5 30.9 25.5 0 65 3 0935 7.5 25.8 27.5 0 163 2 0850 7.5 30.5 25.3 0 34 4 1000 7.5 26.4 28.4 2 178 3 0915 7.5 30.2 26.3 0 32 5 1025 7.5 21.8 28.9 1 33 4 0935 7.5 29.5 26.3 0 109 6 1045 7.5 18.5 30.6 27 131 5 1005 7.5 27.2 26.7 0 23 7 1115 7.5 14.6 32.0 36 172 6 7 1030 1055 7.5 7.5 26.6 25.1 27.2 27.6 6 5 14 44 li/li/bl 1 0805 7.5 29.6 24.8 0 101 2 0830 7.5 28.4 26.1 0 50 7/22/57 1 0810 7.5 31.1 27.1 0 50 3 0900 7.5 27.2 26.2 0 51 2 0830 7.5 30.1 27.1 0 170 4 0910 7.5 26.3 27.2 0 46 3 0855 7.5 29.8 27.6 0 132 5 0930 7.5 24.6 27.1 0 84 4 0915 7.5 29.2 28.1 1 19 6 0955 7.5 23.2 26.9 7 49 5 0935 7.5 26.8 28.1 3 75 7 1015 7.5 22.2 27.0 25 41 6 0955 7.5 24.2 29.6 5 75 8 1030 7.5 17.9 26.6 128 80 7 1025 7.5 20.7 32.7 0 0 13 Appendix table 1. --Continued Sta- T^ma Seine Salin- Temper- Menha- Other Date Sta- Time Seine Salin- Temper- Menha- Other tion length ity ature den fishes tion length ity ature den fishes E.s.t. !k PrP-t: Is.- Number Number E.a.t. M. P.p.t. °C. Number Number 7/26/57 1 0925 30.0 31.1 25.1 252 204 9/9/57 I 0935 30.0 30.7 22.9 0 348 2 0900 30.0 31.3 25.7 10 316 2 0950 30.0 31.2 22.8 0 11 3 0940 30.0 31.1 26.6 417 42 3 1010 30.0 31.2 22.9 0 122 4 1020 30.0 30.3 26.8 169 87 4 1030 30.0 30.1 23.0 1 307 5 1225 30.0 28.0 28.3 0 183 5 1045 30.0 29.7 23.1 17 98 6 1330 30.0 26.4 30.1 0 342 6 7 1100 1126 30.0 30.0 28.1 26.3 23.1 23.2 99 10 59 82 7/29/57 1 2 0820 0850 30.0 30.0 31.3 31.0 24.2 24.9 75 328 215 175 8 1140 30.0 24.2 23.1 58 82 3 0935 30.0 30.7 25.9 631 78 9/11/57 I 0900 30.0 31.0 23.1 0 137 4 1110 30.0 30.5 26.9 1,038 144 2 0920 30.0 30.8 23.6 0 134 5 1150 30.0 30.5 27.4 1 82 3 0940 30.0 30.8 23.7 0 198 6 1230 30.0 29.7 27.6 0 48 4 5 0955 1015 30.0 30.0 29.3 28.8 24.0 24.4 35 7 124 161 8/2/57 I 0830 15.0 32.3 25.7 0 45 6 1035 30.0 27.9 25.1 92 98 2 0915 15.0 32.5 27.3 0 368 7 1055 30.0 26.0 25.8 46 87 3 0945 15.0 32.2 27.5 22 103 8 1115 30.0 25.3 25.1 18 68 4 1015 15.0 31.5 28.2 40 93 5 1100 15.0 29.8 28.6 1 82 9/13/57 1 0830 30.0 30.8 25.5 0 121 6 1115 15.0 29.0 29.3 11 78 2 3 0950 0920 30.0 30.0 30.5 30.2 25.8 26.1 457 656 80 154 8/5/57 1 0810 15.0 32.5 25.5 0 33 4 0950 30.0 29.3 27.0 17 153 2 0830 15.0 32.6 25.8 0 319 5 1020 30.0 27.6 27.4 39 102 3 0915 15.0 32.2 26.6 0 90 6 1035 30.0 28.5 27.8 198 237 4 0940 15.0 30.5 26.6 0 69 7 1055 30.0 27.3 28.0 63 71 5 1005 15.0 29.3 27.0 0 58 8 1115 30.0 25.8 28.6 67 17 6 1025 15.0 28.4 27.4 4 92 7 1045 15.0 27.3 29.7 4 123 9/16/57 1 2 0900 0925 30.0 30.0 30.9 30.6 26.7 26.0 0 1,445 167 18 8/9/57 1 0900 15.0 32.7 23.7 0 138 3 1010 30.0 30.1 26.9 0 162 2 0930 15.0 32.9 23.8 0 450 4 1030 30.0 28.8 27.2 62 245 3 1015 15.0 33.2 25.3 0 126 5 1100 30.0 27.6 27.7 88 435 4 1045 15.0 33.0 25.3 0 91 6 1125 30.0 26.8 28.2 188 306 5 1140 15.0 29.8 25.3 0 67 7 1150 30.0 26.0 28.8 79 261 6 1200 15.0 28.8 25.3 0 103 8 1225 30.0 23.6 29.9 391 127 8/12/57 1 0925 30.0 32.5 24.8 1 150 9/18/57 1 0840 30.0 31.2 22.2 0 82 2 1005 30.0 33.0 25.4 1 267 2 0855 30.0 31.2 22.6 0 64 3 1050 30.0 32.7 26.2 247 188 3 0915 30.0 30.4 23.3 0 140 4 1135 30.0 32.7 26.9 153 103 4 0935 30.0 29.6 23.0 360 456 5 1245 30.0 31.7 27.3 97 108 5 1010 30.0 28.4 22.7 337 67 6 1330 30.0 30.4 27.3 0 67 6 7 1025 1045 30.0 30.0 26.3 25.3 22.8 23.0 100 8 68 212 8/16/57 I 2 0755 0825 30.0 30.0 32.6 32.9 24.3 25.0 18 79 156 350 8 1100 30.0 21.3 23.1 10 194 3 0855 30.0 32.6 25.3 156 115 9/20/57 1 0905 30.0 31.5 22.6 0 354 4 0930 30.0 32.2 26.2 49 163 2 0925 30.0 31.5 22.6 0 117 5 1015 30.0 30.9 27.6 0 199 3 0945 30.0 31.0 23.1 158 116 6 1045 30.0 30.0 28.3 0 140 4 5 1005 1045 30.0 30.0 30.5 26.6 23.7 23.6 51 489 192 206 8/20/57 1 0853 30.0 31.4 20.5 0 127 6 1105 30.0 24.9 23.8 0 195 2 0930 30.0 31.2 20.8 587 179 7 1120 30.0 23.2 25.1 0 310 3 1100 30.0 30.9 21.5 327 129 8 1135 30.0 20.1 24.1 0 486 4 1120 30.0 30.4 21.6 37 125 5 1155 30.0 22.5 21.8 235 222 9/23/57 1 0920 30.0 31.7 24.1 0 47 6 1215 30.0 26.0 22.2 4 65 2 3 0940 1010 30.0 30.0 31.2 31.0 24.4 24.4 202 0 62 920 8/26/57 1 0810 30.0 31.4 22.4 0 102 4 1025 30.0 30.2 24.6 110 298 2 0825 30.0 30.6 22.3 0 105 5 1105 30.0 28.9 24.7 24 112 3 0845 30.0 31.2 22.7 0 129 6 1125 30.0 26.6 24.7 37 110 4 0905 30.0 30.4 22.9 235 301 7 1150 30.0 26.2 25.1 5 118 5 0940 30.0 29.5 22.9 5 73 8 1210 30.0 24.3 24.6 0 210 6 0955 30.0 28.9 23.1 6 101 7 1015 30.0 28.5 23.3 0 43 9/25/57 1 0920 30.0 32.1 20.0 0 1,022 8 1030 30.0 27.0 23.3 21 22 2 3 0935 0950 30.0 30.0 31.8 31.4 19.9 20.5 0 0 17 342 8/30/57 1 0825 30.0 31.0 23.3 0 133 4 1005 30.0 30.9 20.5 61 148 2 0845 30.0 31.2 23.4 223 186 5 1035 30.0 30.1 20.7 0 141 3 0910 30.0 30.6 23.8 0 165 6 1045 30.0 30.0 21.1 1 29 4 0930 30.0 29.6 24.3 0 214 7 1100 30.0 28.8 21.1 0 21 -5 0950 30.0 28.0 24.5 0 328 8 1115 30.0 28.5 21.2 286 12 6 1005 30.0 26.7 25.0 32 303 7 1030 30.0 26.2 25.3 4 567 9/27/57 1 2 0855 0915 30.0 30.0 32.2 31.7 16.4 16.1 0 0 16 606 9/3/57 1 0845 30.0 30.6 25.9 0 182 3 0935 30.0 31.4 17.0 0 338 2 0905 30.0 30.5 25.8 324 107 4 0950 30.0 31.2 16.6 0 71 3 0930 30.0 30.2 26.2 0 94 5 1015 30.0 30.4 16.6 0 91 4 0950 30.0 29.0 26.6 32 113 6 1025 30.0 29.8 16.5 0 25 5 1020 30.0 26.4 27.1 109 237 7 1035 30.0 29.6 16.5 9 23 6 1040 30.0 22.8 28.1 532 384 8 1055 30.0 29.3 16.5 8 11 7 1110 30.0 17.7 29.7 9 795 10/2/57 1 0950 30.0 30.9 17.1 0 42 9/6/57 1 0915 30.0 32.2 23.9 0 492 2 1005 30.0 30.9 17.1 0 220 2 0945 30.0 31.9 24.2 0 77 3 1025 30.0 30.4 17.3 0 138 3 1005 30.0 31.4 24.6 0 192 4 1050 30.0 29.7 17.6 0 155 4 1030 30.0 30.6 24.8 114 124 5 1120 30.0 26.4 18.1 0 225 5 1100 30.0 27.7 24.6 829 436 6 1140 30.0 23.6 18.3 1,562 95 6 1130 30.0 27.0 25.1 28 389 7 1220 30.0 23.2 20.9 0 692 7 1155 30.0 25.3 25.2 17 247 8 1250 30.0 16.4 21.6 66 150 14 Appendix table 1, —Continued Date Sta- Time Seine Salin- Temper- Menha- Other Date Sta- Time Seine Salin- Temper- Menha- other tion length ity ature den fishes tion length ity ature den fishes E.s.t. M. P.p.t, " C. Ninsber Number E.s.t. M. P.p.t. Is, Number Number 10/4/57 1 1005 30.0 31.4 15.8 0 74 10/28/57 1 1310 30.0 30.9 8.4 0 884 2 1035 30.0 31.2 16.1 0 37 2 1320 30.0 30.6 8.1 — — 3 1050 30.0 30.9 16.5 0 238 3 1250 30.0 30.6 8.4 0 155 4 1110 30.0 30.1 16.4 0 190 4 1215 30.0 29.8 8.6 0 22 5 1135 30.0 29.5 16.7 0 40 5 1200 30.0 28.0 8.5 0 26 6 1150 30.0 27.2 16.5 1 154 6 1145 30.0 27.7 8.6 0 211 7 1205 30.0 25.9 16.7 0 98 7 1130 30.0 27.0 8.3 0 97 8 1220 30.0 22.2 16.4 0 159 8 1115 30.0 25.9 8.0 0 185 Vl/l/bl 1 1140 30.0 30.8 17.2 0 209 11/14/57 1 1020 30.0 28.2 9.7 0 183 2 1155 30.0 30.5 17.4 — — 2 1045 30.0 27.2 9.9 0 116 3 1200 30.0 30.5 17.0 0 58 3 1110 30.0 27.0 9.4 1 243 4 1215 30.0 30.0 17.3 0 13 4 1130 30.0 26.2 9.9 0 283 5 1235 30.0 28.9 17.8 5 1155 30.0 27.5 10.0 2 194 6 1240 30.0 28.0 17.8 — — 6 1210 30.0 21.5 11.5 0 627 7 1245 30.0 27.1 17.8 — 7 1230 30.0 22.0 11.7 0 160 S 1246 30.0 25.6 18.2 - ~ 8 1245 30.0 19.9 12.5 0 307 10/9/57 1 0935 30.0 31.0 16.8 0 63 11/19/57 1 1110 30.0 — 14.7 0 70 2 0950 30.0 30.5 17.0 0 7 2 1125 30.0 27.7 15.5 — — 3 1010 30.0 30.4 17.1 0 39 3 1130 30.0 27.0 15.6 0 104 4 1030 30.0 29.6 17.4 0 138 4 1150 30.0 25.9 15.5 0 199 5 1055 30.0 29.5 17.8 0 63 5 1220 30.0 24.1 16.0 0 199 6 1110 30.0 28.8 18.2 0 48 6 1230 30.0 20.4 16.0 0 488 7 1125 30.0 27.7 18.2 0 355 7 1245 30.0 17.4 16.5 1 762 8 1140 30.0 28.0 18.5 65 112 8 1300 30.0 13.4 16.4 0 307 10/11/57 1 1025 30.0 31.2 15.8 0 453 11/22/57 1 1025 30.0 30.1 10.2 0 131 2 1055 30.0 30.6 15.8 — — 2 1045 30.0 28.3 10.5 0 547 3 1105 30.0 30.8 16.3 0 85 3 1105 30.0 27.6 10.4 0 29 4 1120 30.0 30.0 16.5 0 124 4 1120 30.0 26.0 10.6 0 709 5 1145 30.0 29.7 16.7 0 153 5 1210 30.0 23.9 10.7 0 1,501 6 1200 30.0 29.5 16.8 6 1220 30.0 23.7 10.6 0 527 7 1210 30.0 27.9 16.8 0 55 7 1240 30.0 22.5 10.8 0 1,548 8 1225 30.0 28.4 17.0 1 12 8 1255 30.0 19.9 10.2 0 291 10/14/57 1 1015 30.0 30.5 12.4 0 65 11/26/57 1 1355 30.0 29.5- 6.5 0 174 2 1035 30.0 30.5 13.5 0 146 2 1340 30.0 27.1 6.6 — — 3 1100 30.0 30.4 14.0 0 309 3 1330 30.0 27.0 7.2 0 6 4 1125 30.0 29.3 14.0 0 419 4 1230 30.0 25.8 7.2 0 0 5 1150 30.0 28.3 14.5 0 367 5 1215 30.0 21.6 6.3 0 751 6 1205 30.0 27.7 14.8 0 37 6 1200 30.0 23.4 6.8 0 262 7 1240 30.0 27.5 15.3 0 40 7 1145 30.0 17.5 6.3 0 1 8 1255 30.0 26.2 15.4 39 416 8 1130 30.0 18.6 6.5 0 1,774 10/16/57 1 1120 30.0 30.4 14.9 0 42 12/2/57 1 1040 30.0 26.3 5.5 0 1 2 1140 30.0 30.4 15.1 0 780 2 1105 30.0 24.7 6.6 0 52 3 1200 30.0 30.1 15.4 0 378 3 1135 30.0 20.7 5.4 0 96 4 1225 30.0 29.3 15.8 0 41 4 1200 30.0 23.3 7.4 0 355 5 1250 30.0 27.9 16.7 0 252 6 1305 30.0 26.6 17.9 291 42 12/6/57 1 1040 30.0 29.7 3.5 0 2 7 1330 30.0 23.8 18.1 41 121 2 3 1105 1110 30.0 30.0 24.5 25.5 1.7 2.4 — ~" 10/18/57 1 1115 30.0 30.1 16.7 0 106 4 1120 30.0 26.6 3.3 0 0 2 1140 30.0 29.8 16.9 0 47 5 1155 30.0 23.9 3.6 0 5 3 1155 30.0 29.1 17.2 0 56 6 1205 30.0 22.1 3.5 — — 4 1210 30.0 28.4 17.3 490 74 7 1225 30.0 18.1 3.3 — — 5 1255 30.0 26.8 18.2 0 208 8 1235 30.0 15.2 3.2 0 73 6 1310 30.0 24.5 18.8 1,350 70 7 1335 30.0 24.2 19.5 1,636 114 12/17/57 1 2 1040 1115 30.0 30.0 26.8 26.6 4.9 5.5 0 0 10 111 10/21/57 1 1025 30.0 30.6 12.4 0 100 3 1140 30.0 23.9 5.2 0 29 2 1040 30.0 30.1 11.8 0 249 4 1230 30.0 14.7 5.6 0 144 3 1105 30.0 29.8 12.5 0 31 5 1345 30.0 3.6 6.5 0 50 4 1130 30.0 28.8 12.8 0 14 6 1505 30.0 2.7 7.7 0 195 5 1210 30.0 26.8 13.1 0 93 6 1225 30.0 26.0 13.2 0 79 12/27/57 1 1110 30.0 26.8 7.5 0 3 7 1250 30.0 23.8 13.8 35 342 2 1135 30.0 21.1 7.4 0 13 8 1310 30.0 19.6 13.6 0 97 3 4 1150 1205 30.0 30.0 22.6 13.2 7.9 7.2 0 0 41 25 10/23/57 1 1130 30.0 30.4 14.5 0 127 5 1220 30.0 9.5 7.8 0 142 2 1150 30.0 30.1 14.6 0 340 6 1235 30.0 7.5 8.3 1 120 3 1215 30.0 29.3 15.0 0 114 7 1250 30.0 4.9 8.6 2 610 4 1235 30.0 29.6 15.1 0 234 8 1300 30.0 0.8 9.1 0 122 5 1310 30.0 27.3 16.1 0 115 6 1325 30.0 26.8 16.3 3 195 12/30/57 1 1530 30.0 25.4 6.9 29 1 7 1345 30.0 25.5 16.6 1 233 2 1510 30.0 26.4 7.4 0 8 8 1410 30.0 21.5 16.0 15 134 3 4 1450 1435 30.0 30.0 23.8 20.3 7.1 7.8 0 1 4 501 10/25/57 1 2 1145 1125 30.0 30.0 30.4 29.7 14.8 0 233 5 6 1415 1210 30.0 30.0 9.7 4.2 6.7 6.0 2 3 19 19 3 1110 30.0 29.7 15.1 0 24 7 1200 30.0 1.4 6.4 2 574 4 1040 30.0 28.0 15.4 0 79 8 1145 30.0 0.4 6.3 0 606 5 1025 30.0 28.0 15.1 0 46 6 1005 30.0 27.1 15.2 0 117 7 0950 30.0 25.9 15.1 0 55 8 0935 30.0 24.6 15.2 5 25 15 Appendix table 1, — Continued Sta- tion Seine length Salin. ity Temper- ature Menha den Other fishes Sta- tion Seine length Salin- ity Temper- ature Menha- den Other fishes 1315 U5S 1150 1135 1115 1055 1035 1135 1150 1210 1345 1220 1305 1300 1240 1020 1035 1050 1110 1145 1200 1215 1230 1045 1105 1125 1145 1225 1240 1255 1300 1015 1040 1055 1115 1215 1230 1240 1255 1150 1200 1215 1305 1225 1252 1250 1240 1320 1250 1235 1155 1135 1120 1105 1050 1025 1040 1055 1145 1110 1135 1130 1120 it. 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 26.6 22.5 22.4 19.0 12.2 4.9 11.5 3.0 19.4 16.2 12.2 6.2 4.5 3.2 3.3 2.0 26.8 22.5 22.9 17.0 10.0 11.6 7.6 0.8 23.4 20.0 10.2 7.7 6.7 5.5 1.9 1.0 22.8 22.5 11.8 6.9 5.8 3.0 0.8 0.2 24.5 23.0 17.3 15.4 13.8 8.7 6.8 3.0 11.1 18.1 15.4 7.7 5.5 5.2 3.3 3.2 25.6 10.1 10.6 4.5 3.7 3.6 2.4 0.8 C. 4.4 3.2 4.0 4.1 3.3 4.9 3.4 0.0 1.9 1.5 1.4 1.1 1.2 1.4 3.2 3.2 3.2 2.9 3.7 4.1 5.3 6.6 4.0 4.2 4.1 4.6 5.4 5.7 6.2 6.3 3.8 4.6 3.9 4.3 5.3 5.3 5.8 6.0 1.6 1.7 1.4 2.1 2.3 2.7 2.9 2.9 3.7 3.0 3.3 3.7 3.8 3.4 3.8 3.3 0.6 0.7 0.8 0.5 0.3 0.6 0.7 0.5 1100 30.0 22.0 0.2 1110 30.0 21.1 0.7 1130 30.0 8.2 0.5 1255 30.0 3.2 0.7 1145 30.0 4.1 1.1 1235 30.0 3.8 1.8 1230 30.0 3.0 2.4 1200 30.0 - 1.8 1.6 1010 30.0 23.9 2.2 1020 30.0 9.2 1.7 1035 30.0 14.1 1.8 1155 30.0 16.9 3.9 1050 30.0 16.7 5.9 1135 30.0 20.5 6.7 1125 30.0 15.8 7.4 1105 30.0 9.2 7.7 13 11 160 20 223 ,049 0 2 0 2 0 3 0 18 0 35 0 250 1 314 1 354 3 61 8 10 17 83 2/28/58 3/5/58 3/7/58 3/11/58 3/13/58 3/18/58 3/24/58 4/2/58 4/4/58 4/7/58 E.s.t. 1120 1110 1055 0925 0920 0915 0910 0905 1200 1212 1230 1110 1100 1050 1045 1035 1135 1110 1050 1015 1000 0945 0930 0915 1045 1055 1100 1110 1122 1130 1135 1142 1425 1410 1405 1330 1315 1300 1235 1240 1119 1114 1106 1044 1040 1033 1027 1020 1300 1055 1230 1100 1050 1025 1005 0955 1131 1116 1112 1052 1049 1047 1044 1040 1049 1045 1041 1028 1025 102 3 1020 1018 1255 1245 1150 1145 1120 1115 1050 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 30.0 P.p. t. 24.7 21.6 18.6 19.6 8.2 3.6 1.6 0.8 25.0 24.5 21.1 17.9 15.6 15.0 13.2 10.4 24.3 22.8 22.2 19.4 16.2 14.5 11.8 11.5 23.6 22.5 21.1 13.6 8.3 2.8 4.5 2.0 22.2 20.0 14.8 12.2 8.6 4.5 3.6 1.2 21.2 22.5 22.0 15.8 13.1 12.7 10.8 18.8 18.1 8.S 6.0 3.7 2.2 1.6 1.4 24.1 21.9 21.3 9.0 8.2 6.4 7.2 4.1 13.6 15.5 15.1 14.8 11.4 10.0 10.2 5.9 23.4 22.6 15.2 10.8 12.2 10.2 7.8 6.5 6.7 5.8 6.3 6.4 6.5 6.5 5.6 5.8 6.4 6.2 6.8 6.6 5.8 6.3 6.5 6.8 6.4 6.5 6.4 6.6 6.0 6.5 7.0 5.9 7.1 7.3 8.1 8.9 6.0 5.4 5.9 6.0 5.4 6.4 5.7 6.4 6.2 5.9 6.7 7.4 7.3 6.4 8.0 7.9 6.8 7.9 8.3 7.8 8.5 9.8 10.4 10.5 11.0 11.3 11.8 12.1 11.3 11.6 11.7 13.3 13.5 12.9 13.1 13.2 16 Appendix table 1. —Continued Date Sta- Tiae Seine Salin- Temper- Menha- Other Date Sta- Time Seine Salin- Temper- Menha- Other tion length ity ature den fishes tion length ity ature den fishes E.s.t. tk p.p,";- V. Number Number E.s.t. tL P.p.t. °C. Number Number 4/10/58 1 1040 30.0 17.5 10.1 0 5 5/20/58 I 1215 30.0 21.7 19.7 0 712 2 1050 30.0 17.8 10.7 0 56 2 U50 30.0 22.9 20.1 0 695 3 1115 30.0 10.9 10.6 0 77 3 1140 30.0 18.2 20.6 0 810 4 1130 30.0 8.0 10.7 0 67 4 1105 30.0 12.9 21.1 1 534 5 1205 30.0 5.5 10.9 0 103 5 1050 30.0 12.7 21.3 1,300 299 6 1220 30.0 2.6 10.6 0 46 6 1040 30.0 11.0 21.3 425 678 7 1235 30.0 2.0 10.9 0 16 7 1025 30.0 8.4 21.2 300 931 8 1255 30.0 1.2 12.7 0 474 8 1015 30.0 5.9 20.8 0 1,510 U/Vt/iS 1 1240 30.0 19.6 12.9 0 2 5/27/58 1 1205 7.5 25.9 18.7 0 39 2 1215 30.0 13.6 13.3 0 48 2 1140 7.5 23.9 18.9 0 62 3 1145 30.0 9.1 12.9 0 29 3 1135 7.5 22.6 19.7 0 2 4 1045 30.0 5.4 12.8 0 194 4 1110 7.5 16.2 19.1 0 87 5 1025 30.0 3.8 12.9 1 330 5 1100 7.5 6.9 18.3 215 26 6 1010 30.0 1.4 12.1 1 454 6 1055 7.5 2.6 18.5 0 25 7 0955 30.0 0.6 11.5 0 87 7 1050 7.5 1.3 19.0 3 35 8 0940 30.0 0.4 11. 1 0 3 8 1045 7.5 0.6 18.7 0 15 4/17/58 1 1020 30.0 23.4 11.8 0 6 5/29/58 1 0930 7.5 26.2 17.9 0 1 2 1035 30.0 23.3 12.8 0 28 2 0940 7.5 24.3 18.1 0 39 3 1100 30.0 22.8 13.6 0 5 3 0945 7.5 24.3 18.9 0 3 4 1120 30.0 20.0 13.5 0 320 4 0955 7.5 22.5 19.3 0 4-8 5 1205 30.0 9.5 15.1 0 326 5 1015 7.5 17.0 19.9 2 45-19 6 1220 30.0 5.6 15.3 6 365 6 1025 7.5 12.7 20.1 0 8-29 7 1230 30.0 2.8 15.9 3 459 ^ 1040 7.5 9.0 20.6 21 16-29 8 1245 30.0 0.6 15.9 0 78 8 1050 7.5 2.8 20.1 0 6-15 4/21/58 I 1315 30.0 25.4 16.6 0 37 6/2/58 1 1130 7.5 23.3 21.6 0 3 2 1305 30.0 22.0 19.6 0 123 2 1110 7.5 18.3 23.2 1 36 3 1235 30.0 18.8 18.8 0 133 3 1100 7.5 16.8 23.1 0 12 4 1155 30.0 15.9 19.2 2 87 4 1020 7.5 14.8 22.6 25 33-28 5 1140 30.0 16.7 19.7 0 266 5 1005 7.5 15.1 22.7 12 31-14 6 1120 30.0 16.9 19.8 9 155 6 0955 7.5 13.7 22.8 28 34-14 7 1105 30.0 10.2 20.3 27 303 7 0945 7.5 13.3 22.7 2 38-31 8 1040 30.0 4.0 19.3 0 644 8 0925 7.5 7.8 22.8 15 64-38 4/24/58 1 UOO 30.0 24.9 16.2 0 12 6/5/58 1 30.0 — .. _. __ 2 1045 30.0 20.7 16.5 0 245 2 — — — — — — 3 1035 30.0 20.3 16.8 0 182 3 — — 4 0950 30.0 18.2 17.5 0 100 4 1355 30.0 21.5 22.7 134 433 5 0940 30.0 12.3 17.8 0 652 5 1405 30.0 15.8 24.2 130 687 6 0930 30.0 7.0 17.0 30 379 6 1420 30.0 11.9 24.3 124 339 7 0915 30.0 5.1 17.0 0 411 7 1500 30.0 9.0 25.3 5 397 8 0900 30.0 1.0 15.4 0 368 8 1530 30.0 7.0 24.9 0 1,242 4/29/58 1 1145 30.0 21.2 18.2 0 129 6/6/58 1 1125 7.5 27.3 20.2 0 13 2 1120 30.0 19.2 17.8 0 293 2 1115 7.5 24.2 21.3 0 53 3 1105 30.0 18.6 18.2 0 406 3 1105 7.5 24.1 21.6 7 84 4 1015 30.0 19.0 17.0 0 224 4 1050 7.5 18.8 21.9 0 36 5 1000 30.0 10.3 17.3 185 678 5 1040 7.5 18.7 22.5 4 45 6 0950 30.0 6.3 17.4 245 570 6 1030 7.5 17.8 22.3 2 51 7 0935 30.0 2.6 16.8 0 216 7 1025 7.5 13.6 22.7 28 13 » 0925 30.0 0.8 16.3 0 988 8 1015 7.5 8.8 22.5 0 39 5/1/58 1 0945 7.5 20.3 14.4 0 15 i 6/9/58 1 0820 30.0 23.4 22.1 0 218 2 0935 7.5 16.5 14.6 0 79 2 0835 30.0 21.5 22.3 43 633 3 0930 7.5 16.4 15.8 0 0 : 3 0915 30.0 18.8 22.6 6 247 4 0920 7.5 17.9 17.5 0 7 4 0935 30.0 19.5 23.4 305 248 5 0910 7.5 8.3 16.5 1 3 5 1020 7.5 14.2 25.6 63 63 6 0905 7.5 10.5 16.4 0 88 [ 6 1030 7.5 9.2 26.3 42 77 7 0900 7.5 2.7 15.2 0 124 1 7 1045 7.5 2.4 25.7 1 155 8 0850 7.5 1.0 13.8 0 0 j 8 — — — — - 5/7/58 1 1051 7.5 25.9 11.7 __ __ 6/11/58 1 0850 30.0 26.3 25.0 0 347 2 1040 7.5 24.6 11.8 — — 2 0900 30.0 22.8 26.3 38 591 3 1035 7.5 24.1 11.9 — — 3 0935 30.0 22.5 27.0 65 329 4 1015 7.5 12.0 11.7 — — i 4 0955 30.0 21.1 27.3 0 124 5 1010 7.5 4.4 11.5 — — 1 5 1040 30.0 17.3 28.9 164 485 6 1000 7.5 1.7 11.4 — — 1 6 1105 30.0 13.1 29.9 25 365 7 0955 7.5 1.3 11.4 — — 1 7 1130 30.0 8.9 31.1 11 179 8 0950 7.5 0.2 11.3 - - 1 8 — — — — — -- 5/9/58 1 0955 7.5 19.9 14.4 0 9 1 6/13/58 1 1045 30.0 26.2 26.5 0 600 2 0935 7.5 11.9 14.6 1 9 2 1005 30.0 21.1 26.1 36 1,015 3 09 35 7.5 11.5 14.6 0 1 3 0945 30.0 19.6 26.4 0 390 4 0905 7.5 13.4 14.5 0 0 4 0905 30.0 20.5 26.9 25 581 5 0900 7.5 2.7 13.6 0 15 5 0845 30.0 17.9 27.1 252 362 6 0855 7.5 1.0 13.2 0 1 6 0830 30.0 11.6 26.1 109 494 7 0835 7.5 0.5 13.2 20 5 7 0813 30.0 11.9 26.5 4 390 8 0840 7.5 0.2 13.3 0 0 8 0755 30.0 7.0 25.5 0 367 5/14/58 1 1205 7.5 22.9 19.0 0 35 6/18/58 1 0835 30.0 25.4 21.0 1 309 2 1145 7.5 21.5 19.2 0 38 2 0905 30.0 24.2 21.2 180 262 3 1120 7.5 20.8 19.1 0 4 3 0930 30.0 22.6 22.1 0 155 4 1055 7.5 17.9 19.8 0 58 4 0950 30.0 21.9 23.1 84 194 5 1045 7.5 9.4 20.1 308 67 5 1020 30.0 19.5 24.2 14 277 6 1040 7.5 3.3 18.9 0 30 6 1035 30.0 18.8 25.0 465 159 7 1035 7.5 4.2 18.9 8 42 7 1050 30.0 17.5 25.0 597 201 8 -1030 7.5 0.5 17.2 0 25 8 1145 30.0 19.4 26.0 363 309 17 Appendix table 2, --Number of fish caught per seine haul, grouped by 3-month periods; White Creek, Del. (A 1957; B = July--September, 1957; C = October--December, E = April--June, 1958) 1957; D - January- -March, 1958; April--June, Species 3-month period Station Dasvatis sayi Elops saurus Alosa aestivalis \ A. pseudoharengus Brevoortia tvrannus Anchoa hepsetus. A, mitchilli. Anchoviella eurvstole. Umbra pygmaea. ........ Cyprinids Anguilla rostrata Strongylurus marina. Hvphorhamphus unifasciatus. Cyprinodon variegatus, . . . . . Fundulus diaphanus. P. heteroclitus. F, maialis. Lucania parva. 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.4 0.0 0.1 0.0 0.0 0.0 0.0 1.1 1.9 0.0 0.0 0.0 0.0 0.0 11.4 196.4 0.0 0.9 16.7 0.0 0.0 0.0 0.0 0.0 0.0 2.3 85.3 0.1 2.0 4.3 0.0 0.2 0.0 0.1 10.0 9.3 3.5 48.0 32.5 21.2 2.5 6.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.6 0.7 0.0 0.4 0.0 0.1 0.1 0.0 0.0 0.0 0.0 0.4 1.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.0 0.0 0.1 0.1 0.0 0.0 0.0 0.1 0.0 0.8 1.9 1.0 0.6 0.0 0.0 1.6 3.4 3.0 0.1 1.0 0.1 1.2 0.5 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 13.8 59.6 16.4 10.2 18.0 13.0 0.6 50.2 22.0 1.1 0.4 0.0 70.8 137.9 77.8 3.4 2.4 1.2 16.0 1.4 0.8 3.4 6.6 3.2 0.1 0,0 1.0 17.1 13.1 0.9 0.1 0.8 1.9 1.1 55.6 0.4 0.2 7.2 0.4 0.4 1.1 0.1 8.2 27.0 0.3 0.0 0.0 0.0 0.0 0.1 8.9 105.1 23.4 0, 27. 26.0 30.6 19.3 17.8 0.0 0.0 0.0 0.0 0.0 0.2 0.1 0.0 0.0 0.1 0.0 0.2 0.0 0.0 0.0 0.2 0.0 10.3 0.7 3.3 0.0 0.0 0.0 0.0 0.0 27.9 13.8 3.1 0.0 43.4 1.5 3.1 0.9 0.2 6.0 1.2 0.1 0.4 0.0 0.7 0.0 0.0 0.0 0.1 0.1 114. 72. 0. 0. 140. 0. 0. 8.5 15.0 7.5 25.6 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.4 0.0 0.0 0.0 0.0 0.0 8.4 2.1 6.9 5.3 6.8 0.0 0.0 0.0 0.0 0.1 50.3 31.1 22.7 0.1 90.6 4.1 2.3 5.6 0.6 8.7 1.5 0.1 0.6 0.1 1.5 0.0 0.0 0.0 0.0 0.1 149.4 62.0 169.0 0.3 75.5 0 1 0 0 11 8 7 1 4 2 21 6 0.0 0.0 0.0 0.1 0.5 0.1 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 9.4 6.4 22.4 9.6 7.0 0.0 0.0 0.1 0.0 0.0 28.6 48.3 37.2 2.7 89.0 1.8 3.6 9.1 1.0 7.5 1.0 0.5 1.8 0.7 0.9 0.0 0.1 0.0 0.0 0.0 201. 13. 7. 0. 54. 0. 0, 7. 2, 0, 1 0.0 0.1 0.0 0.0 0.6 0.0 0.0 0.1 3.1 0.0 0.0 0.1 0.0 0.0 118.4 54.3 12.8 0.2 2.7 0.0 0.0 2.4 1.1 0.1 0.2 0.0 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.9 3.6 3.3 2.6 134.7 149.6 38.5 53.1 11.3 35.5 0.0 0.2 0.0 0.1 0.0 0.1 0.0 0.1 0.1 0.0 36.0 22.4 78.5 31.7 120.2 35.7 1.6 6.1 217.0 271.7 0.9 3.6 5.2 5.8 5.6 11.3 0.4 4.1 1.2 1.2 0.7 0.2 0.4 1.6 4.2 17.7 3.6 12.2 1.5 1.3 18 Appendix table 2. --Continued Spec ies 3-month period Gambusia af finis Pollachius virens Apel tes quadracus Gasterosteus aculeatus. , , . Hippocampus erectus Syngnathus fuscus Roccus americanus Pomatomus saltatrix Caranx crvsos C^. hippos Decapterus punctatus Trachinotus falcatus Eucinostomus argenteus. . . . Orthopristis chrvsopterus. Bairdiella chrvsura Cynoscion nebulosus Leiostomus xanthurus Menticlrrhus saxatilis, . , , Micropogon undulatus , Pogonias cromis , Gobiosoma bosci G. Rlnsburgi Microgobius thai las inus. . Prionotus carol inus 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.2 0.1 0.0 0.4 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.1 0.0 0.0 0.1 0.0 0.0 3.9 2.5 0.0 0.6 0.0 0.0 0.0 2.1 0.4 0.2 0.0 0.0 0.1 0.0 0.0 0.1 0.1 0.0 4.2 0.2 0.2 0.0 0.0 0.8 0.0 0.0 0.1 0.1 0.1 2.5 0.5 0.0 2.3 0.0 0.0 0.0 5.8 0.1 2.0 0.0 0.0 0.0 0.3 0.1 0.0 0.0 0.2 0.2 1.2 0.8 0.0 2.2 0.0 0.0 0.1 8.6 0.6 2.1 0.0 0.0 0.0 0.1 0.1 0.1 0.1 0.4 0.3 0.6 0.0 0.0 0.1 5.2 0.3 1.1 0.1 D 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 E 0.1 0.0 0.1 0.0 0.0 0.0 0.0 0.0 A 0.0 0.5 0.0 0,0 0.0 0.0 0.0 0.0 B 0.0 1.4 0.0 0.0 0.0 0.0 0.0 0.0 : c 0.1 1.6 0.2 0.1 0.1 0.0 0.0 0.1 D 0.1 1.1 0.3 0.0 0.3 0.1 0.0 0.3 E 1.1 3.6 0.5 0.3 0.6 0.3 0.2 0.1 A 0.0 0.1 0.0 0.0 0.1 0.0 0.0 0.0 E 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 C 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 A 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 B 0.0 0.6 0.2 0.0 0.0 0.0 0.0 0.0 C 0.0 0.3 0.1 0.0 0.0 0.0 0.0 0.0 ! E 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 E 0.0 0.0 0.0 0.0 0.2 0.1 0.1 0.0 A 0.0 0.1 0.0 0.0 0.0 0.1 0.0 0.0 B 0.1 0.0 0.1 0.0 0.1 0.1 ; 0.0 0.0 E 0.2 0.1 0.3 0.2 0.2 0.4 ; 0.0 0.0 C 0.0 0.0 0.0 0.0 0.0 0.1 ; 0.0 0.0 B 0.0 0.0 0.4 0.1 0.1 0.0 0.0 0.0 C 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 B 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 B 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 B 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 C 0.3 0.4 0.0 0.1 0.1 0.0 0.0 0.0 B 0.5 0.0 0.1 0.0 0.0 0.0 0.0 0.0 C 0.1 0.0 0.0 0.0 0.1 0.0 0.0 0.0 ; B 0.1 13.1 3.4 9.6 8.8 4.5 5.8 0.8 1 c 0.1 0.1 0.2 0.1 1.1 2.0 1.7 0.3 > E 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0.3 1.0 1.9 0.0 1.5 0.0 0.0 0.0 2.7 1.1 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.1 0.2 0.1 0.1 0.5 0.0 0.0 0.0 0.1 0.1 0.0 0.0 19 Appendix table 2, — Continued Species 3 -month period P. evolans Astroscopus Ruttatus , Chasmodes bosquianus , Mugil cephalus Membra martinica. . Menidia beryllina. M. menidia. Paralichthys dentatus. Pseudopleuronectes americanus Trinectes maculatus . . , Symphurus plagiusa. . . . Sphaeroides maculatus. Opsanus tau 0.0 0.1 0.0 0.0 0.0 0.1 0.4 0.2 0.0 1.4 0.2 3.5 0.1 9.4 0.0 13.4 2.8 2.2 0.0 14.6 24.7 116.0 125.3 0.1 9.5 0.0 0.0 0.1 0.1 2.0 1.2 0.0 1.4 0.0 0.0 0.1 0.2 0.0 0.5 0.1 0.0 0.0 0.0 0.1 0.1 0.0 0.1 30.1 10.3 21.9 0.0 39.4 2, 37, 61. 0, 6, 0, 0, 0, 0.0 0.1 0.4 0.0 0.1 0.0 0.0 0.0 0.0 0.0 2.6 0.1 0.2 0.0 0.0 0.0 0.1 0.0 0.0 0.0 1.3 0.6 29.2 0.9 2.1 0.4 1.3 0.3 57.7 10.0 5.4 0.3 21.7 2, 61. 48. 1, 16. 0.0 0.3 0.0 0.2 0.5 0.5 0.3 1.9 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.3 0.8 1.0 36.3 0.4 4.5 1.1 4.8 0.0 45.9 3.8 16.6 0.0 35.3 1. 54. 123. 20.7 0.1 0.5 0.0 0.1 0.1 0.3 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 1.9 0.4 0.4 0.1 37.3 0.0 3.1 0.5 4.2 0.0 63.6 25.5 31.7 0.3 37.4 0.8 31.0 38.8 19.4 29.4 0.1 0.1 0.2 0.5 0.0 0.0 0.0 0.2 0.0 0.5 0.0 0.0 0.0 0.0 0.4 0.2 0.0 0.0 0.0 0.0 0.0 0.0 2.2 0.2 0.4 0.0 22.7 2.7 3.5 0.4 0.3 0.0 69.7 24.2 26.1 6.9 50.0 0.7 17.0 112.8 88, 23, 9 9 0.1 0.5 0.1 0.2 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.1 0.0 0.0 0.1 0.0 0.7 0.2 0.3 0.3 4.5 0.0 1.0 1.4 1.3 0.0 24.8 35.0 41.1 6.1 40.8 0.1 9.8 93. 40, 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.3 0.0 48.0 50.7 60.8 174.3 41.2 0.3 3.3 28.5 534.3 40.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 20 Appendix table 3. — Number and fork length ranges (mm. in parentheses) of fishes, grouped by station and by month of collection White Creek, Del. Species Dasyatis sayi Elops saurus Alosa aestivalis. . . A. pseudqharenfius. . ^revoorti_a tyrannus Station Month of col- 8 lection Anchoa hepsetus. (735) (122-130) 1 (89) (28-30) 339 (32-62) (123) 907 (75-131) 4,983 (92-145) 30 (28-31) 1 (36) (26-30) 1 (29) 299 (26-57) 55 (27-33) 12 (32-48) 1,351 (48-98) 551 (74-128) 656 (94-121) 1 (27) 14 (26-30) 247 (26-43) 11 (33-52) 1,157 (50-108) 714 (61-123) 1,281 (73-128) 490 (87-114) 1 (27) (27-29) 1 (92) 1 (263) 179 (24-33) 3,121 (23-59) 126 (29-51) 363 (51-81) 322 (67-133) 1,502 (68-135) (94-113) ; 2 ! (30) 1 (240) (102) 145 (23-44) 4,071 (22-60) 267 (28-57) 351 (39-116) 76 (74-116) 1,432 (72-140) 3,207 (78-136) 78 (28-43) 1 (52) (59-60) 4 (67-78) 1 (31) 1 (46) 550 (28-61) 6 (52-80) 186 (26-32) 1,826 (26-54) 662 (26-63) 1 (73) (73-76) 1 (61-76) 4 (32) (150-170) (93-113) 291 (24-32) (222) 425 (33-45) 793 (28-77) (49-68) 1 (66) (26-36) 5,279 (25-54) 146 (28-55) 9 (51-68) (70-108) 290 (68-136) 107 (67-122) 1 (149) 4 (32-33) (91-92) 1 (34) 30 (27-32) 352 (26-51) 653 (26-67) 7/57 10/57 1 4/57 (59) U/57 4/58 6/58 4/57 921 5/57 (26-42) 736 6/57 (26-54) 9 (48-55) (32,104) I 7/57 21 8/57 (87-128) 838 9/57 (53-137) 192 10/57 (59-127) 11/57 12/57 1/58 4/58 5/58 49 6/58 (28-69) - ! 7/57 - ! 8/57 - ■ 9/57 10/57 Pectoral width 21 Appendix table 3. --Continued Species Station Month of col- 1 2 3 4 5 6 7 8 lection A. mitchilli ...••••>>>•• < - 96 (50-89) - 500 (54-85) 18 (47-71) 149 (37-90) 2 (51-56) _ 4/57 - 199 (45-76) 190 (46-70) 183 (42-64) 194 (33-81) 203 (31-70) 185 (33-80) 32 (45-67) 5/57 - 2 (53-55) 80 (49-68) 71 (47-62) 42 (44-75) 1 (60) 6 (48-62) 1 (65) 6/57 - 8 (41-69) 11 (58-78) 18 (56-79) 11 (56-72) 18 (54-69) 14 (51-79) 1 (78) 7/57 2 (35) 19 (22-52) 8 (28-66) 119 (27-90) 52 (25-87) 30 (33-82) 2 (63-64) 2 (38-73) 8/57 1 (42) 79 (22-74) 1,420 (23-84) 782 (22-81) 387 (23-85) 164 (22-77) 38 (22-76) 14 (23-47) 9/57 21 (43-59) 5 (56-70) 421 (28-58) 400 (25-86) 66 (23-59) 46 (24-86) 3 (53-76) 1 (51) 10/57 (59) 450 (40-76) 3 (50-60) 5 (56-64) 74 (45-80) 34 (29-80) 5 (33-75) 1 (43) 11/57 - - - - 2 (39-44) - 1 (44) - 12/57 - 3 (55-80) 3 (61-81) 2 (69-73) 58 (53-81) 79 (37-80) - - 4/58 4 (35-50) 6 (55-61) 6 (43-63) 22 (47-70) 72 (43-65) 81 (45-69) 1 (48) - 5/58 31 (53-64) 36 (49-65) 108 (46-68) 332 (40-80) 357 (43-72) 272 (44-70) 33 (44-65) 4 (50-57) 6/58 Aachoviella eurystole. - - - 1 (36) - - - - 7/57 Umbra pvfflnaea . - - - - - - 1 (80) 6/57 Cvprinids, ............... . . . - - 1 (48) 1 (44) 2 (38-60) 4/57 - . . . - . 1 (50) - 5/57 - 1 (20) - - - - - - 8/57 . - - - - 1 (32) - - 12/57 Anguilla rostrata 2 (50-60) - - - 1 (50) - 7 (57-139) - 4/57 2 (57-59) 3 (53-62) - 2 (57) 4 (56-300) 2 (56-136) 26 (57-200) 1 (64) 5/57 - 15 (55-67) 19 (60-70) 1 (58) - 2 (60-78) 9 (60-145) 14 (57-114) 6/57 • 4 (60-450) - - - 2 (200-350) - 2 (102-124) 7/57 1 (600) 5 (71-143) - 1 (430) - 1 (600) - - 8/57 - 2 (450-600) - 1 (500) I (600) - - - 9/57 - 1 (83) 1 (450) - . - - - 10/57 - _ - - - - 1 (78) 12/57 22 Appendix table 3. —Continued Species . . . . Station Month 1 2 3 4 5 6 7 8 lection Anguilla roscrata--Continued - - . _ _ . 1 3/58 " - - - - - (55) - 2 (56-60) 5 (510-580) - - - 7 (241-600) - 4 (60-190) 4/58 - 1 (52) - 1 (175) 5 (52-61) 2 (56-60) 28 (57-182) 24 (52-67) 5/58 5 (55-96) 12 (52-370) - - 3 (54-360) - ! 31 1 (60-168) 79 (58-155) 6/58 ScronEvlura marina - - 1 (56) - - 1 (61) - - 6/57 - 1 (190) - 2 (87-98) - 1 (81) - - 7/57 1 (145) 1 (134) 3 (155-362) (137-310) - 1 (89) - - 8/57 - 2 (212-266) - - - - - _ 9/57 - - - 1 (119) - . _ _ 10/57 HvDorhamDhus unifasciaCus. 4 (103-117) 1 (112) - - - - . _ 8/57 - 1 (143) - . - _ _ 6/58 Cvprinodon variegatus - 2 (35-57) 13 (37-56) 2 (39-41) 19 (34-60) U (33-62) - - 4/57 17 (42-62) 5 (42-58) 11 (34-55) 2 (43-49) 112 (30-65) 177 (35-69) 57 (35-63) 3 (52-58) 5/57 8 (48-57) 50 (49-63) 4 (45-56) 2 (55-62) 120 (44-65) 95 (37-64) 47 (39-62) 48 (31-63) 6/57 1 (60) - - - 59 (45-68) 145 (47-66) 38 (39-63) 16 (34-62) 7/57 16 (49-58) 1 (57) - - 3 (50-61) 24 (51-61) 7 (48-59) - 8/57 - - 1 (37) - 24 (29-63) 30 (34-68) 26 (17-60) 9/57 2 (36-46) 20 (26-48) 8 (31-46) 174 (26-53) 25 (26-59) 45 (28-46) 454 (21-53) 258 (20-66) 10/57 23 (28-42) 4 (22-31) 8 (25-56) 1 (30) 24 (25-66) 311 (23-59) 1,686 (24-67) 1,381 (21-72) 11/57 8 (33-47) 24 (24-58) 44 (29-53) 42 (27-51) 82 (24-60) 70 (22-60) 15 (27-61) 605 (26-65) 12/57 - 6 (36-50) 1 (31) 4 (27-33) 32 (23-40) 52 (24-42) 249 (22-65) 251 (23-62) 1/58 - - - - 3 (30-33) 3 (29-41) 7 (27-56) 55 (25-60) 2/58 1 (34) 1 (41) - 2 (35-38) 7 (28-32) 31 (25-39) 52 (26-65) 172 (27-65) 3/58 8 (33-44) 6 (28-52) 1 (41) 64 (26-49) 85 (25-64) 67 (26-65) 37 (26-59) 217 (27-60) 4/58 6 (33-53) - 2 (36-47) - 18 (37-62) 20 (31-59) 53 (32-64) 135 (29-67) 5/58 8 (45-64) 3 (49-58) 2 (52-58) 1 (50) 27 (42-61) 52 (34-55) 124 (33-66) 287 (34-62) 6/58 23 Appendix table 3, — Continued Month Species Station of col- 1 2 3 4 5 6 7 8 lection Fundulus diaphanus . . . . . . . 1 5/57 - - - - - - - (54) - - - - - 1 - 2 6/57 - - - - - (78) - (52-62) - - - - - - - 1 7/57 - - - - " - - (53) _ _ 1 _ _ . . 8/57 - - (90) - - - - - . . . . 1 - 1 10/57 - - - - - (66) - (65) . . . . . . . 1 1/58 - - - - - - (60) _ _ _ _ 1 . 1 . 4/58 - - - - (30) - (77) - F. heteroclitus 5 (43-76) 416 (36-113) 96 (24-96) 181 (45-95) 317 (39-106) 189 (28-105) 53 (40-90) - 4/57 169 762 160 336 410 375 607 99 5/57 (38-95) (31-114) (37-103) (30-122) (33-109) (2 9-104) (26-109) (31-87) 239 611 219 292 782 294 313 214 6/57 (40-95) (45-113) (44-108) (43-114) (45-102) (30-109) (38-100) (25-90) 181 240 138 148 330 388 208 117 7/57 (37-107) (51-112) (44-101) (55-111) (48-118) (29-102) (30-90) (38-88) 105 261 179 221 421 466 501 2 8/57 (51-114) (25-lU) (47-106) (53-105) (42-110) (43-107) (35-100) (75-80) 21 40 74 46 183 596 1,097 388 9/57 (33-111) (69-115) (40-108) (42-107) (23-100) (24-109) (33-95) (27-99) 5 684 338 62 173 349 863 330 10/57 (36-96) (19-112) (31-120) (44-105) (27-122) (32-105) (25-110) (30-81) 5 6 34 2 259 356 1,060 199 11/57 (38-57) (41-82) (34-100) (53-72) (24-104) (28-115) (35-200) (36-113) 2 13 68 1 - 1 . 6 12/57 (38-46) (35-104) (25-97) (50) - (65) - (39-115) ^ _ _ _ . 1 _ 6 1/58 - - - - - (94) - (36-85) - - - - - - - ■ 2/58 8 3 . . 1 23 13 49 3/58 (44-82) (49-79) - (77) (39-85) (40-94) (33-85) 61 227 275 95 931 833 2,592 2,163 4/58 (40-102) (37-100) (33-96) (32-97) (22-107) (31-119) (33-102) (26-120) 624 558 480 158 157 352 630 1,136 5/58 (31-113) (30-106) (33-105) (40-112) (39-106) (29-107) (35-104) (33-107) - 590 1,698 646 615 634 594 901 1,592 6/58 (41-108) (45-120) (45-111) (35-116) (35-99) (41-107) (23-107) (34-108) F. ma ialis............... 1 (63) 1 (105) 16 (29-148) - 38 (44-72) 1 (70) - - 4/57 72 35 18 30 67 17 16 12 5/57 (62-152) (44-128) (32-129) (65-160) (37-137) (60-89) (73-134) (72-121) 30 35 10 12 19 36 9 39 6/57 (70-140) (66-125) (79-121) (66-97) (55-96) (73-130) (76-140) (68-134) 179 9 5 5 5 16 5 21 7/57 (50-155) (77-115) (78-131) (77-138) (75-119) (39-133) (104-140) (81-109) 24 Appendix table 3.— Continued Species -+- Month of col- lection F_. maialiS"Cont ^nued. Lucania parva. Gambusia af finis. 149 (43-153) 153 (34-160) (53-150) 161 (33-90) (58-55) 29 (44-153) (109-139) 5 I (32-52) 87 (52-114) 1 (63) 1 (47) 12 I (40-142) 49 (51-150) 246 (65-161) 1 (40) 13 (23-37) 17 (20-28) 4 (26-30) (27-30) 2 (30) (27-33) 2 (32-37) 39 (25-38) 106 (25-42) 97 (55-143) 54 (55-150) (56-134) (30-36) 19 (26-39) 2 (32-33) 378 (20-42) 1,200 (15-31) 89 (21-34) 29 (19-31) 36 (24-33) 36 (21-35) 4 (25-32) 1 (30) 3 (25-30) 73 (23-36) 134 (25-39) 279 (25-44) 11 (49-111) (36-133) 23 (45-141) 24 (42-144) 15 (44-103) (44-54) (54-149) (48-160) (64-80) 4 (90-137) 6 (28-30) (32-38) 44 (22-41) (23-25) 12 (38-150) 75 (20-95) (34-146) I (41-111) 4 (40-47) 1 i (114) i 1 . (150) : 14 (45-125) 28 (63-138) 77 (69-152) 7 ! (29-40) I 29 (24-39) ! i 1 I (25) (48-153) I (53-144) 58 (23-147) 56 (27-151) 47 (39-74) 4 (31-60) 84 (21-153) 98 (40-151) 75 (33-143) 1 (53) 11 (34-147) 103 (42-150) 26 (38-128) 64 I (47-160) (38-128) 68 (31-145) 84 (23-156) 71 (50-154) 14 (50-146) 35 (43-149) (44-133) (47-113) (54-126) I (56-66) 125 (37-150) 28 (52-148) 13 (56-142) 12 (34-39) 67 (30-145) 50 (48-149) 33 (62-140) (34-37) (41-150) I (48-115) 4 (69-129) I (25-37) ; (28-39) 28 (23-38) 1 (24) (20-25) (24-28) j (29-30) , 1 (23) 1 (32) (25-35) 4 (28-31) 1 (28) (25-36) 1 (35) 1 (29) (27-32) I (27-30) (32-33) (25-35) 9 (24-39) 4 (29-33) (26-40) 1 (26) 22 (27-37) I (29) (25-34) 19 (25-35) 2 (22-27) 12 (20-37) 3 (25-38) (29-40) 24 (23-34) 3 (29-33) (28-33) (28-35) (32-34) (25-38) 13 (74-142) 5 (27-34) 13 (28-38) 12 (74-127) 1 (28) (28-38) 4 (20-36) 2 (38-41) 1 (26) 1 (33) 3 (26-39) 22 (27-42) 51 (25-39) 78 (25-40) 6 (29-37) 10 (26-33) i 24 (27-35) 3 (28-32) 2 (31) 12 (26-35) (31-40) 13 (25-38) 63 (24-36) 125 (22-37) 72 (25-39) 14 (25-35) 24 (25-34) 16 (25-34) 8 (27-37) 1 (31) 8/57 9/57 10/57 11/57 12/57 1/58 3/58 4/58 5/58 6/58 4/57 5/57 6/57 7/57 8/57 9/57 10/57 11/57 12/57 1/58 2/58 3/58 4/58 5/58 5/58 6/57 25 Appendix table 3. --Continued Species Station Month of col- 1 2 3 4 5 6 7 8 lection Pollachius virens - (39) - - - - - - 3/58 2 (63-70) - 2 (49-57) - - - - - 4/58 Apeltes quadracus . 15 (22-32) - - - - - - 6/57 - 16 (27-36) - - - - - _ 7/57 - 25 (24-37) - - - - - - 8/57 - 1 (32) - - - - - - 9/57 1 (33) 9 (28-49) - - - - - - 10/57 5 (39-46) 1 (34) 1 (42) - - - - 11/57 2 (40-46) 7 (36-49) 3 (37-54) - 1 (34) - - 1 (47) 12/57 - 2 (34-37) 2 (34-49) - 1 (35) - - 2 (38-44) 1/58 - 1 (35) " - - 1 (35) - - 2/58 1 (48) 5 (36-53) - - 1 (37) - - 1 (35) 3/58 - 5 (32-49) 7 (33-52) - 2 (33-34) 1 (47) - 1 (43) 4/58 " 8 (20-49) - - 3 (22-24) 1 (24) 1 (19) - 5/58 19 (22-36) 50 (25-34) 2 (29-30) 6 (23-31) 6 (28-33) 4 (22-31) 3 (25-29) - 6/58 GasCerosteus aculeatus - 4 (19) - - 2 (20) - - - 5/57 - 1 (21) - - - - - - 5/58 Hippocampus erectus - 1 (70) - - - - - 11/57 SvnRnathus fuscus - 2 (41-69) - - - - - - 6/57 - 8 (89-130) 2 (70-96) - - - - - 7/57 - 8 (112-170) 4 (128-144) - - - - - 8/57 -" . 3 (143-198) . - - - - - 9/57 . 4 (127-195) 2 (169-179) - - - - - 10/57 6 (145-195) - - - - - - - 6/58 Roccus americanus - - - - 3 (147-220) 1 (130) 1 (92) - 4/58 26 Appendix table 3. --Continued Species Station Month 1 2 3 4 5 6 7 8 lection Pomacomus salcacrix - - - - 1 (39) 2 (49-64) - - 5/57 - 2 (83-86) - - - - - - 6/57 2 (93-129) 1 (123) 2 (98-137) 1 (81) 2 (94-107) 3 (91-104) - - 9/57 3 (54-62) 1 (55) 5 (39-78) 3 (57-69) 4 (43-65) 7 (35-83) - 6/58 - - - - 1 (135) - - 10/57 C. hippos - 1 (107) 13 (59-92) 2 (44-53) 3 (42-46) 1 (52) - 7/57 - - - - - - 1 (131) - 9/57 - - - - - 1 (60) - - 10/57 Decapterus puncCaCus - - 1 (68) - - - - - 7/57 Trachinotus falcatus 1 (52) - - - - - - - 7/57 Eucinostomus arRenCeus, . . - 1 (32) - - - - - - 8/57 - 3 (72-76) - - 1 (77) - - - 9/57 6 (44-88) 5 (51-86) - 2 (33-91) 1 (41) - - - 10/57 Orchopristis 2 (32-35) _ - - . _ - : 8/57 13 (32-83) - 3 (49-62) - - - - - 9/57 2 (63-76) - - - - - - - 10/57 Bairdlella chrysura - 68 (21-69) 6 (18-42) 8 (8-32) 54 (22-58) 12 (28-62) - - 7/57 1 (27) 234 (7-106) 63 (48-89) 162 (53-105) 113 (51-105) 48 (44-91) 51 (44-89) 2 (76-79) 8/57 1 (32) 92 (20-116) 32 (60-115) 117 (60-114) 97 (67-115) 75 (57-116) 83 (60-110) 10 (85-109) 9/57 I (72) 2 (47-72) 3 (56-71) 2 (90-100) 20 (73-111) 38 (79-125) 27 (66-110) 5 (62-98) 10/57 - - - - - 1 (20) - - 6/58 Cvnoscion nebulosus - - - - - - 1 (192) - 9/57 LeiosComus xanthuras - - - - 1 (48) - 1 (63) - 5/57 - - 1 (195) 3 (169-184) 3 (190-200) 1 (75) - - 7/57 1 (179) - - 9 (113-200) 1 (200) 2 (81-207) - - 8/57 2 (149-212) 3 (136-162) 2 (142-148) 11 (148-200) 5 (150-211) - - - 9/57 27 Appendix table 3.-- Continaed Species Station Month of col- 1 2 3 4 5 6 7 8 lection Menticirrhus saxacllis. . . 1 (122) - - - - - - - 7/57 2 (155-158) - - - - - - - 9/57 MicropoKon undulatus - - " - 1 (48) - 1 (22) - 10/57 - . - - 1 (28) 2 (20-47) - 11/57 - - - - 1 (17) 1 (26) " - 12/57 - - - - - 1 (19) - - 1/58 PoKonias cromis - . - - . 1 (72) - - 7/57 - . 1 (104) 1 (117) - - - - 8/57 1 (140) 3 (127-147) 3 (145-200) 1 (169) 1 (115) 2 (145-155) - 1 (171) 9/57 - - - 3 (182-208) 3 (164-176) 8 (149-218) - - 10/57 Goblosoma boscl . - - 1 (33) - - 1 (34) - 4/57 - - - 2 (34-45) 6 (28-52) 6 (25-45) 6 (28-45) 1 (34) 5/57 1 (54) 1 (39) 1 (39) - 1 (56) 2 (37-52) 2 (37-43) 1 (39) 6/57 - 1 (54) 9 (22-44) 60 (U-32) 7 (14-28) - - - 7/57 1 (26) 61 (15-42) 31 (21-36) 9 (22-37) 15 (28-36) 10 (23-40) 1 (33) - 8/57 4 ■(36-46) 56 (20-43) 40 (15-48) 5 (27-38) 15 (17-44) 7 (21-44) 21 (20-45) 3 (27-45) 9/57 3 (27-30) 32 (25-48) 40 (21-47) 6 (23-44) 5 (18-31) 1 (29) 20 (24-45) 2 (26-43) 10/57 - 2 (47-53) 2 (31-36) 1 (33) 8 (26-42) 2 (25-43) 7 (26-42) - 11/57 . 1 (32) 4 (30-34) 4 (24-31) 3 (27-44) 3 (25-35) 3 (26-41) - 12/57 • . - - - - - 1 (30) 3/58 1 (21) 5 (28-54) 2 (49-52) 1 (31) 11 (24-51) 14 (25-54) 5 (33-57) - 4/58 - 2 (29-43) 4 (35-53) 6 (29-41) 12 (29-57) 2 (42-46) - - 5/58 7 (32-68) 3 (30-58) 26 (30-64) 39 (23-59) 19 (31-62) 8 (30-50) 23 (34-55) 9 (29-53) 6/58 G. Rinsburfii - - 1 (10) - - - - - 7/57 • _ 1 (42) - - - - - 9/57 - - 1 (30) - - - - - 12/57 28 Appendix table 3. — Continued Month Species Station of col- 1 2 3 4 5 6 7 8 lection Microgobius thalassinus. , _ _ _ « 3 (38-39) - - - 5/57 - - - - - 4 (41-55) - - 6/57 - 1 (29) 6 (26-46) 30 (8-47) 42 (16-48) - - - 7/57 - 23 (20-37) 74 (17-44) 95 (21-51) 108 (17-36) 65 (21-37) 4 (23-33) - 8/57 - 39 (23-43) 45 (20-42) 50 (21-43) 107 (21-44) 91 (28-45) 59 (23-42) 1 (32) 9/57 - 5 (34-44) 3 (40-42) 1 (33) 5 (37-45) 5 (36-45) 17 (36-46) 1 (34) 10/57 1 (47) - - - 6 (27-43) - - - 11/57 - - 1 (44) 4 (44-48) 16 (38-45) 2 (40) - 4/58 - - 3 (38-45) 4 (40-45) 3 (45-48) 1 (46) - - 5/58 - 4 (40-53) 1 (40) 34 (40-51) 32 (42-51) 4 (39-50) 2 (46-48) - 6/58 PrionoCus carolinus - - - - - 2 (183-189) - - 10/57 P. evolans 1 (51) - - - - - - 8/57 Astroscopus guttatus 1 (28) - " - - - - 11/57 Chasmodes bosquianus - 2 (70) - - - - - - 9/57 - - 1 (78) - - - - - 10/57 _ 2 (78-81) - - - - 1 (60) - 12/57 - - - 1 (83) - - - - 3/58 Muftil cephalus, 4 (29-30) 18 (29-38) - - 43 (31-38) 55 (25-41) 8 (30-39) - 4/57 _ » _ 1 (48) 14 (33-70) 11 (6-63) 9 (46-63) 6 (58-67) 5/57 - 1 (72) - 1 (78) 1 (76) - 1 (91) 4 (66-87) 6/57 6 (156-170) 3 (152-178) . 1 (108) 1 (75) 2 (123-156) - - 7/57 1 (177) 2 (186-189) 1 (189) 3 (187-198) 7 (82-194) 2 (76-175) - - 8/57 5 (187-205) 1 (191) - 4 (199-220) 5 (190-208) 1 (185) 5 (189-217) 1 (192) 9/57 4 (202-209) . 22 (165-204) 16 (170-201) 2 (192-193) 2 (185-195) 2 (126) - 10/57 - 1 (233) 1 (25) - - 1 (24) 2 (167-197) - 11/57 29 Appendix table 3. --Continued Month Species Station of col- I 2 3 4 5 6 7 8 lection Mugil cephalus—Continued - - 2 (27-28) . 6 (25-30) 5 (26-30) - _ 12/57 - 8 (27-28) (232) 4 (24-28) 9 (28-29) 1 (26) - 2 (26-27) - 1/58 23 (27-31) 8 (28-32) 201 (24-33) 134 (26-34) 295 (25-31) 159 (27-34) 5 (29-31) (215) 1 (29) 4/58 2 (26-34) - 251 (30-46) 271 (30-49) 18 (27-34) 77 (25-52) 25 (30-49) 87 (33-48) 5/58 - 101 (55-74) 74 (55-70) 320 (43-84) 395 (30-93) 217 (37-72) 55 (39-88) 15 (33-58) 6/58 M. curema 6 (26-28) - 26 (25-32) 11 (24-30) 1 (25) 81 (27-35) - - 6/57 2 (76-91) 12 (73-89) 1 (79) 57 (51-105) 44 (20-94) 71 (26-102) 3 (65-85) I (41) 7/57 33 (80-129) 7 (100-137) 41 (86-131) 43 (97-136) 20 (82-134) 25 (85-129) 10 (89-133) 1 (109) 8/57 69 (UO-141) 8 (115-138) 20 (117-135) 34 (112-144) 30 (100-138) 8 (85-134) 9 (112-132) 9 (100-122) 9/57 1 (82) 18 (95-131) 8 (69-112) 22 (84-120) 10 (91-140) 8 (80-115) 22 (72-126) 6 (92-134) 10/57 170 (24-32) - 24 (27-36) 96 (26-33) 80 (26-34) 6 (29-31) 24 (28-34) 60 (26-35) 5/58 Membras martiaica - 3 (29-45) 8 (29-45) - - - - - 9/57 Menidia bervllina 6 (45-52) 144 (38-63) 200 (35-57) 135 (45-75) 537 (38-69) 815 (33-73) 41 (33-55) - 4/57 119 (40-57) 397 (39-76) 547 (38-69) 684 (39-77) 697 (39-68) 787 (37-69) 392 (34-70) 97 (39-59) 5/57 276 (42-67) 361 (39-71) 825 (35-70) 513 (35-79) 573 (38-66) 488 (28-70) 237 (38-70) 575 (33-66) 5/57 71 (41-65) 232 (44-89) 232 (40-70) 57 (36-66) 91 (40-58) 134 (22-72) 79 (40-64) 189 (23-53) 7/57 4 (50-60) 45 (40-59) 52 (45-60) 23 (44-55) 174 (40-55) 143 (40-54) 99 (40-60) 10 (40-47^ 8/57 8 (42-54) 33 (40-62) 15 (41-61) 33 (40-55) 500 (40-65) 449 (40-65) 626 (40-63) 612 (40-61) 9/57 35 (40-46) 305 (40-54) 98 (40-52) 332 (40-62) 502 (40-65) 351 (40-60) 288 (40-70) 408 (40-68) 10/57 12 (40-55) - 4 (42-59) 8 (35-50) 98 (40-52) 134 (40-61) 365 (40-70) 455 (40-66) 11/57 - . 1 (51) 5 (40-44) 8 (40-53) 2 (56-57) 10 (41-63) 5 (46-56) 49 (40-60) 12/57 . _ 1 (41) . - 2 (40-49) 12 (40-61) 627 (40-60) 1/58 - _ 1 (43) - 1 (59) 41 (40-70) - 42 (40-52) 2/58 _ - _ - 1 (48) 19 (41-58) 37 (37-68) 900 (34-65) 3/58 6 (43-50) 248 (36-56) 37 (38-61) 274 (35-61) 255 (37-68) 384 (35-68) 221 (38-72) 458 (34-60) 4/58 30 Appeadix table 3- — Continued Species Sea ion Month of col- 1 2 3 4 5 6 7 8 lection M. bervllina — Continued. . 67 (44-73) 153 (42-69) 65 (46-62) 197 (44-70) 158 (40-65) 270 (39-75) 432 (45-72) 208 (44-68) 5/58 189 (42-78) 308 (43-69) 289 (40-63) 234 (43-67) 296 (41-76) 345 (41-73) 123 (43-66) 75 (44-62) 6/58 M, menidia 39 (49-116) 2 (87-114) 32 (63-109) 21 (59-121) 17 (58-98) 19 (69-105) - - 4/57 86 (43-117) 48 (36-109) 20 (85-142) 9 (83-102) 3 (74-104) 3 (94-110) 1 (120) - 5/57 616 (27-118) 27 (36-100) 13 (36-111) 18 (37-50) 4 (39-54) - 1 (45) 4 (34-44) 6/57 324 (40-128) 101 (40-114) 238 (40-115) 150 (40-117) 43 (39-58) 18 (40-72) 9 (40-55) 1 (40) 7/57 506 (40-122) 213 (40-89) 548 (39-109) 432 (40-87) 210 (40-77) 109 (40-69) 46 (40-70) 1 (47) 8/57 2,650 (40-109) 817 (40-105) 1,062 (40-117) 1,047 (40-91) 676 (40-118) 382 (40-87) 170 (40-82) 51 (40-108) 9/57 2,280 (40-119) 698 (40-108) 645 (40-131) 466 (40-108) 678 (35-127) 242 (40-107) 274 (40-104) 18 (41-103) 10/57 349 (45-108) 71 (57-110) 300 (52-115) 1,165 (53-137) 2,125 (52-180) 982 (47-123) 74 (43-102) 409 (42-103) 11/57 3 (58-83) 98 (55-100) 22 (58-90) 965 (52-131) 112 (49-100) 919 (50-120) 1,150 (52-129) - 12/57 1 (70) 1 (62) 6 (60-74) 61 (55-103) 151 (58-117) 6 (60-176) 202 (55-104) 4,805 (44-103) 1/58 - - - - - 19 (45-84) _ - 2/58 - 2 (52-63) 1 (106) 27 (48-82) 4 (93-112) 775 (40-106) 125 (48-76) 4 (53-63) 3/58 71 (58-117) 113 (61-116) 287 (57-120) 407 (51-118) 556 (53-123) 476 (53-123) 155 (54-115) 726 (45-138) 4/58 20 (51-115) 5 (62-110) 1 (83) 5 (74-110) - 1 (65) - - 5/58 80 (61-117) 6 (71-101) 5 (78-106) 2 (80-95) 2 (83-93) 1 (100) - - 5/58 Paralichthvs dentatus. . . . - - - - 3 (49-60) 1 (95) 1 (84) - 5/57 - - - - - 1 (150) - - 6/57 - - 1 (149) - - - - - 7/57 1 (143) 4 (145-183) 4 (75-200) 1 (194) 1 (167) 6 (150-255) - - 8/57 - 3 (199-204) 3 (191-273) 2 (165-182) 2 (193-289) 9 (189-220) 1 (198) - 9/57 2 (206-235) 1 (225) - 1 (182) 3 (156-212) 2 (226-258) 4 (182-245) - 10/57 - - - 1 (208) - - - - 11/57 - - - 1 (169) 5 (23-30) (169) 3 (25-32) - - 4/58 - - - 2 (54-67) 3 (55-55) - - - 5/58 31 Appendix table 3.— Continued Species Station Month of col- 1 2 3 4 5 6 7 8 lection Paraltchthvs dentatus— Continued 2 (68-98) : 3 (71-103) 6 (78-108) 1 (107) : : : 6/58 Pseudopleuronectes amerlcanus 2 (78-86) _ 2 (67-81) _ - _ ■ - 7/57 33 (75-121) - 3 (84-114) - - - - - 8/57 24 (65-118) 3 (99-116) 11 (70-119) - 1 (86) - _ - 9/57 22 (44-136) 4 (101-118) 5 (92-131) 1 (100) - - - - 10/57 3 (140-160) - 3 (142-174) _ - - - - 11/57 . 1 (148) 1 (177) 1 (143) - - - - 12/57 - - 2 (161-168) - - - - - 1/58 . - - 1 (140) - 1 (171) - - 3/58 1 (200) 1 (189) 3 (155-179) 1 (173) - - - - 4/58 - - 5 (50-54) 4 (42-52) - - - - 5/58 25 (65-80) 1 (62) 26 (44-76) 1 (45) 4 (44-65) - - - 6/58 Trinectes maculatus - - - - - - - 1 (47) 6/57 - _^ - - 1 (57) - - - 10/57 Svmphunis plaKiusa - - 1 (58) - - - - - 9/57 Sphaeroides maculatus. . . . 1 (152) - - - - - .— - 7/57 1 (82) - - - - - - - 8/57 3 (170-200) - - - - - - - 6/58 Opsanus tau. ............. - - - 1 (250) 1 (113) - - - 5/57 _ _ . . - 1 (73) - - 6/57 2 (31-38) 18 (33-58) 4 (36-55) 3 (43-54) - - - - 7/57 4 (53-56) 53 (37-300) 13 (43-173) 19 (45-124) 4 (54-64) - - - 8/57 8 (52-188) 7 (60-103) 22 (59-195) 16 (38-307) 9 (62-76) 4 (70-74) 5 (69-104) - 9/57 2 (61-63) 1 (300) 4 (71-83) 2 (58-65) 4 (70-83) - - - 10/57 - 1 (280) - - - - - - 4/58 - 2 (110-225) 1 (225) - - 1 (87) - - 6/58 3Z 5 WHSE 01630 Created in 1849, the Department of the Interior — a depart- ment of conservation — is concerned with the management, conservation, and development of the Nation's water, fish, wildlife, mineral, forest, arid park and recreational re- sources. It also has major responsibilities for Indian and Territorial affairs. As the Nation's principal conservation agency, the De- partment works to assure that nonrenewable resources are developed and used wisely, that park and recreational re- sources are conserved for the future, and that renewable resources make their full contribution to the progress, pros- perity, and security of the United States — now and in the future. UNITED STATES DEPARTMENT OF THE INTERIOR FISH AND WILDLIFE SERVICE BUREAU OF COMMERCIAL FISHERIES WASHINGTON, D.C. 20240 U.S. POSTAGE AND FEES PAID DEPARTMENT OF-THE INTERIOR OFFICtAL. BUSINESS Return this sheet to above address, if you do NOT wish to receive this material □, or if change of address is needed [^ (indicate change). Llbrjii'lan, Uarine Diologlcal Lab.. ggjj 7 tooda !lole, Mass.