ZOOPLANKTON VOLUMESOFF THE PACIFIC COAST, 1956

Marine Biological Laboratory

JAN(i -1958

WOODS HOLE, MASS.

SPECIAL SCIENTIFIC REPORT- FISHERIES No. 232

UNITED STATES DEPARTMENT OF THE INTERIOR

FISH AND WILDLIFE SERVICE

EXPLANATORY NOTE

The series embodies results of investigations, usually of restricted

scope, Intended to aid or direct management or utilization practices and as

guides for administrative or legislative action. It is issued in limited quantities

for official use of Federal, State or cooperating agencies and in processed formfor economy and to avoid delay in publication

,

United States Department of the Interior, Fred A. Seaton, SecretaryFish and Wildlife Service

ZOOPIANKTON VOLUMES OFF THE PACIFIC COAST, I956

James R. ThraillcillFishery Research Biologist

Special Scientific Report—Fisheries No, 232

Washingtcxi, D. C»

October 1957

Abstract

Basic data on volumes of zooplankton off the Pacificcoast in 1956 are given, together vdth haul data for allplankton hauls taken on survey cruises of the CaliforniaCooperative Oceanic Fisheries Investigations. Distri-bution chajrts shovdng relative areal zooplankton abun-dance by month are included.

Zooplankton Volumes off the Pacific Coast, I956

The six reports in this series preceding this one have appeared under theauthorship of the staff of the South Pacific Fishery Investigations. Theycover the seven-year period, 1949 throu^ 1955. Distribution charts for allroutine cruises made during these years have been presented in Thrailkill, 1956,This report combines both the basic data on zooplankton volmnes and diatritautioncharts of zooplankton abundance for each cruise nsde in 1956 off the Pacificcoast of California and Baja California.

Plankton collections are used by the South Pacific Fishery Investigationsof the Fish and Wildlife Service in studying the distribution and abundance ofthe egg and larval stages of the Pacific sardine and other commercially impor-tant or potentially important fishes, Basic data on fish eggs and larvae aregiven in a yearly series of reports in Special Scientific Report—Fisheriesviiich parallel those on plankton volumes. Plankton collections are also usedby Scripps Institution of Oceanograf^y of the University of California instudying the productivity of spavming areas.

The research vessel. Blade Douglas . operated by the U, S. Fish andWildlife Service made all cruises betv/een February and September, Fivevessels operated by the Scripps Institution of Oceanography nade cruisesduring 1956. The vessels participating in each cinise vrere as follows:

Figure 1.—Average Plankton Volvunes

1956

AVERAGE PLANKTON VOLUMES

956

CC OF PLANKTON PER 1000 CMOF WATER STRAINED

0-33

34-100

^R 101-300

^1 301-900

^H OVER 900

o STATIONS OCCUPIED

These investigations are part of the California Cooperative OceanicFisheries Investit'ations, a program sponsored by the Marine Research Gommitteeand carried out by the Scripps Institution of Oceanography of the University ofCalifornia, the Bxireau of Marine Fisheries of the California Department of Fishand Game, the California Academy of Sciences, the Hopkins Marine Station ofStanford University and the South Pacific Fishery Investigations of the Fishand Wildlife Service.

It is vdth deep pleasure that the author acknowledges the cooperationgiven by the Scripps Institution of Oceanography in the collection of data atsea. All personnel of the South Pacific Fishery Investigations contributed tothis project—many devoting their full time to ito

The earlier publications in this series are the following:

STAFF, SOUTH PACIFIC FISHERY INVESTIGATIONS

1952 Zooplankton volumes off the Pacific coast, 1951, U. S. Dept.Interior, Fish and Wildlife Service, Spec. Sci, Kept—FisheriesNo. 73, 37 pp.

1953 Zooplankton voliunes off the Pacific coast, 1952. U. S. Dept.Interior, Fish and Wildlife Service, Spec. Sci. Repb—FisheriesNo. 100, 41 pp.

1954 Zooplankton volumes off the Pacific coast, 1949-50. U. S.

Dept. Interior, Fish and Wildlife Service, Spec. Sci. Rept

—

Fisheries No. 125, 54 pp.

1954 Zooplankton volumes off the Pacific coast, 1953. U. S. Dept.Interior, Fish and Wildlife Service, Spec. Sci. Rept—FisheriesNo. 132, 38 pp.

1955 Zooplankton volumes off tlB Pacific coast, 1954. U. S. Dept,Interior, Fish and Wildlife Service, Spec. Sci. Rept—^Fisheries

No. 161, 35 pp.

1956 Zooplankton volxmies off the Pacific coast, 1955. U. S. Dept.Interior, Fish and Wildlife Service, Spec. Sci. Rept—FisheriesNo. 177, 31 pp.

THRAILKIIL, JAMES R.

1956 Relative Areal Zooplankton Abundance off the Pacific coast,U. S. Dept. Interior, Fish and V/ildlife Service, Spec. Sci,Rept—^Fisheries, No, 188, 85 pp.

Figure 2. -Plankton VolumesJanuary 1956

PLANKTON VOLUMES

JANUARY 1956

CC OF PLANKTON PER 1000 CMOF WATER STRAINED

0-33

34-100

101-300

301-900

OVER 900

STATIONS OCCUPIED

Planlcton Volumes, Cruise 5601, JaniJary 1956

Plankton Volumes, Cruise 56OI, Jan-uary 1956 (cont'd)

Figtare 3»—^Plankton Voliomes

Febrvary 1956

Plankton Volumes , Cruise 5601, Januiry 1956 (conf d)

Plankton Volumes, Cruise 5602, February 1956 (cont'd)

Plankton Voliimes, Cruise 5602, February 1956 (cont'd)

Position

Sta. N.lat, W.long.

Time (PST) Vol.water Depth of

(1956) strained haulDate Start End CM. in meters

Vol.per 1000CM. strainedTotal Sm.org,cc. cc.

110.50110.60110.70110.80113.30113.35113.40113.50113.60113.70117.26117.30117.35117.40117.50117.60117.70118.39119.33120.25120.30120.40120.45120.50120.55120.60120.70123.37123.42123.50123.55127.34127.40127,50127.55130,30130.35130.40130.50130.60133.25133.30133.40

29°14'28° 56'

28°36'

28°l6«29°22'

29°11«

29°01«28°41'28°22«28°04»

28°55.6'28"47. 6

•

28°38.5'28°28.8«28°08»

27°47.8'27°32'28''18.5'

28°19.5'28°22.8«28°13.5'27°52.5'270421

27034127026'

27°15.5'26«'53.5'

27°24.2'27°14'26°58'

26°55.5'26°43.5'26°22.5»26°11.5'26°29'

26°19.5'26°09'

25°49»25°29'

26°04.5'

25°55.5'25°32.8'

116° 58117°38118°18118° 57115°18115''39

115° 58116°38117°15117° 52114°40114° 55115°18115°36116°15116° 52117°31115°23

1U°53114°U114°34

115°U115°32115° 50116°06116°27117°09rL4°39

1U°59115°30

114°06114°29115°07115°28113°29113 "50114°08114°42115°23112°48113 °08

113°45

6'

6«

2'

5'

5«

5«

5'

5'

5'

8'

5'

2'

5'

2'

11-1611-1611-1611-1611-1711-1711-1711-1811-1811-1711-1611-1611-1611-1711-1711-1711-1711-1711-1611-1611-1611-1611-1611-1611-1511-1511-1511-1411-1411-15

2306165612010626

1409171120060141050100411828202822560441loa155620060211101314291218

054303160026215118261316191822160211

2321171012160641141417262021015605160056183520372311045610551611202102261022

14341227

055003310041216618401331192522310226

476490456452175466463436466456284238448572412515

409471295180289282

446441475300645248415482

Occupied. Sample spoiled11-1411-1411-1411-1411-1311-1311-1311-1311-1311-1311-1211-12

144812110716041607091016

125617462256022323511851

14561226

073104310714103013111760231102310006

1905

242484470497223512

525489434207430485

0-1400-1390-1420-1440-360-1290-1330-1330-1280-1340-640-740-1290-1380-1310-1260-1530-1320-740-440-820-66

0-1360-1370-1260-1330-1330-600-1420-131

0-680-1270-1330-1300-330-1280-1290-1310-1460-640-1220-131

189196878

1155

7992814897

57301051820

4331112

424364425280798853

7858412900766

5051633161820232217236297

3224117073045

3911570184299130219

7429

441377996965200150228

4163783132599727

113

25915641243376638168

50

5046

217188

141

223

411363684598157046

U513087

11

Figure 4.—^Plankton VolumesMarch 1956

CC OF PLANKTON PER 1000 CM

OF WATER STRAINED

0-33

34-100

m 301-900

^1 OVER 900

o STATIONS OCCUPIED

12

Planlcton Volumes, Ciiii£;e 5602, February 1956 (cont'd)

PL'inkt on Volumes, Cruise 5603, March 1956 (cont'd)

Plankton Volumes, Cruise 5603, March 1956 (cont'd)

PLinkton Volumes , Cruise 56O3 , March 1956 (cont'd)

Figure 5»—Plankixjn Voltames

April 1956

CC OF PLANKTON PER 1000 CMOF WATER STRAINED

0-33

34-100

^P 101-300

^H 301-900

^M OVER 900

STATIONS OCCUPIED

18

Plankton Volumes, Cruise 5604, April 1956 (cont'd)

Plankton Volumes , Ci'uise 5604, April 1956 (cont'd)

TijDe (P3T) Vol.v.'ater Depth of

sti'ained haulStart End CM. in meters

Position

Sta N.lat .

(1956)'/.Mor.n;. Date

Vol.per 1000CM, strainedTotal Sm.crg.cc. cc,

100.29100.33100.40100.50100.60100.70100. eo100.90103.30103.35103.40103.50103,60103.70103.80103.90107.32107.35107.40107.50107.60107.70107.80107.90110.33110.35110 o40110.50110.60110.70110.80110.90113.30113.35113.40113.50113.60113.70113.80117.26117.30117.35117.40

31°42'31035,31°20.5'31°00.5'30°40.5'30°21«30°00'

29° 41'

31007130059130°47'30^^29.5'

30°08,5'

29°28.5'29°07'

30°25.9«30°20.3'30°12«29''53.6'

290321

29°12'28°52'28°32«

29° 50. 5'

29°45.2'29^36. 5'

29019,28°57'28°37'28°15.2'27053129021129° 18'

29°12»

28°54'28°28»28°03'

27037,28''55.8'

28°48'

28°37.8'28°26,2«

116°43116° 59117''26

118° 08118°47119° 27120°09120°46116°28116°47117*^11

117°46118° 25119°04119 °43120° 23116°11116°22116°44117°23118°01118°42119°22119° 55115° 52

116°00116°20117°00117°38118°20118° 5

6

U9°34115° 16115°41116°07116°37117°18117°55118° 33114°40

1U°56115° 16115°35

c.

6'

5'

5"

5'

2«

5'

1«

8«

5'

2»

IV-23IV-23IV-23IV-24IV-24IV-2i^

IV-24IV-25IV-26IV-26K-26IV-26IV-25IV-25IV-25IV-25IV-26IV-26IV-26IV-26IV-26IV-25IV-25IV-25IV-24IV-24IV-24IV-24IV-24IV-24IV-25IV-25IV-23IV-23IV-23IV-23rV-23IV-22IV-22IV-20IV-21IV -21r/-21

17^119362317042109061406195601311338104607560231212015561116064117361606130608110221223117311256005803110621

1031161121260221072119451710135609560430231017412313010703251621

175619512332043609211420201101461346110008110246

2135161111300656175116211321082502362246174613100]06032606361026162621410236073619521725141110]1

0445232517562320011703401635

418408413403486377429267kOLv

402

423413411413422511

4944465U490502

553

45922341^.

445462487545509

555154

439515578501480558269278528514

0-1390-1350-1380-1370-1390-1260-1400-1370-590-1380-1340-1340-1410-1210-1350-1330-1290-1280-1470-1150-1200-1300-1250-1390-730-1230-1240-1190-1270-1120-123O-LI70-500-1250-1250-1070-1360-1370-1220-510-350-1370-137

279246243

3311120149816546214610992

6272421256240797182631

38142838481103743489

1723245

4425

953651213

1357139514688124772559725

4591217988697206

279246

24316225822216546214610992

125

397256

240

797182

469195115481103743489

1723

245539953651213

33475U301124616

559725

4591217420280111

20

Plankton Volumes, Cruise 5604, April 1956 (cont'd)

Time (PST) Vol^water Depth of

(1956) strained haulDate Start End CM. in meters

Position

Sta. N.lat« V/.long.

Vol, per 1000CM. strainedTotal Sm.org,cc. cc.

117.50117.60117.70117.80118.39119.33120.25120.30120. itO

120.45120.50120.55120.60120.70120.80123.37123.40123.42123.50123.60127.34127.40127.50127.60130 „30

130.35130.40130.50130.60133.25133.30133.40137.23137.30137.40140,30U0.35140.40143.26U3.30143.35U3.40U7.20

28°07.8

21"hi.

5

27°24.227°06'

28°18«28° 23.

3

28°13.2270531

27°44.127^31.527023127°19*

26°53.526°33«

27°23.127°18.527''lJ!+'

26°55.526°39'

26°55.526°44'26°20«

26°03.526°28.526°16«

26°07.525 "49'25°26'

26°04.225°59.225°35.425°34'

25°19.625°00.424°47.2240371

24°24.524^19

'

24°10.824°01,223°50.523°56.2

« 116° 15

Figure 6, -Plankton Volviines

May 1956

PLANKTON VOLUMES

MAY 1956

CC OF PLANKTON PER 1000 CMOF WATER STRAINED

0-33

34-100

101-300

301-900

OVER 900

STATIONS OCCUPIED

22

Planlcton Volumes, Cruise 56O4, April I956 (cont'd)

Plankton Volumes, Cruise 5605, May 1956 (cont'd)

Plankton Volumes, Cruise 5605, May 1956 (cont'd)

Plankton Volumes, Cruise 5605, May 1956 (cont'd)

Plankton Volumes, Cruise 5605, May 1956 (cont'd)

Plankton Volumes, Cruise 5605, May 1956 (cont'd)

Figiore 7.—Plankton VolumesJune 1956

PLANKTON VOLUMES

JUNE 1956

CC OF PLANKTON PER 1000 CMOF WATER STRAINED

0-33

34-100

^m 101-300

Jl 301-900

^1 OVER 900

o STATIONS OCCUPIED

J L

130 12:

29

Plankton Volumes, Cruise 56O6, June 1956 (cont'd)

Plankton Volumes, Cruise 56O6, Jime 1956 (cont'd)

Plankton Volujaes, Cruise 56O6, June I956 (cont'd)

Position

(1956)Sta. N.lat. W.lon;S:. Date

Time (PST) Vol.v/ater Depth ofstrained haul

Start End CM. in meters

Vol. per 1000CM. strainedTotal Sm.org.

cc. cc.

107.32107.35107.40107.45107.50107.55107.60107.65107.70107.75107.80107.85107.90110.33110.35110.40110.45110.50110.55110.60110.65110.70110.75110.80110.35110,90113.30113.35113.40113.45113.50113.55113.60113.65113.70113-75113 » 80117.26117.30117.35117.40117.45117.50

30°25.8'30°20«

30°10.5'30°00'

29^50.5'29°40'

290311

29°21.5'29°04.8»28°55'

28°51.5'28°41.7'28°31.5'29°50.5'29°46.5'29°36.5'290271

29°l6.5'29°07'28°57'28°47'

28°36.5'28°26.5'28°16,5'28°06.3'

27°56.5'29°22.5»29012

«

29°01,5«28°51'28°42'28°32'28°22'

28°12»

28°02.3'27°46.8'27°36'28° 56'

28°48«28°38'28°28«28°18«

28°08«

116°11116° 23116°43117° 03117° 23117°44118°03118° 22118°45119°02119° 22

119°41120°01115°52116°00116° 19116 °39116° 59117° 17117°37117° 58118°18118°37118° 57119° 16119°36115°17115039115° 57116° 19116°37116° 57117^16117°35117''58

118° 23118°47114°40114°56115°16115°35115°55116° 15

5'

3'

7'

5'

5'

2'

5'

5'

5'

2'

5'

5'

2'

5'

8«

5'

2«

VI-16VI-16VI-16VI-16VI-16VI-16VI-15VI-15VI-15VI-15VI-15VI-15VI-14VI-12VI-12VI-13VI-13VI-13VI-13VI-13VI-13VI-13VI-14VI-lAVI-14VI-14VI-12VI-12VI-12VI-12VI-11vi-nVI-11VI-11VI-11VI-11VI-11VI-8VI-8VI-9VI-9VI-9VI-9

1740143010310746045101462146

1836

13391006

0536023622412113

22350201054608211156151120502326

03a063112411546

14430939061102462306201616411331101606060156185820470001025620312316

17561444104508000506020122001850

1354102005500251225621222249021606010836121015252104234103560645125616001449095406260300232020301656134610300620021119052058001603112C46

2331

396459421456428406418393455451433442441264448419381424376449419440421

437417456239441438316371402398410443425416154187282

422

445442

0-1450-1300-1410-1370-1410-1500-1390-1440-1390-1400-1390-1400-1400-840-1350-1420-1420-1340-1500-1370-1410-1380-1470-1400-1430-1340-420-1390-1390-1440-1460-141

0-U30-1440-1410-1420-1400-780-950-1320-1400-1420-148

290288155346551

20861167323

1302

5544206421380466

13391334662538

18111747198872

124647216661

4595516322529927

1115

55324172112

17X32173648556

143035627701071

290288

155346551

208611673231302

554420642

138046613391298662

5381811

1747198872

124647216661

4595516322529

9271115

55324172112

17132132648556

935356

2770886

33

Plankton Volumes, Cruise 56O6, June 1956 (cont'd)

Figure 8,—Plankton VolumesJuly 1956

Plankton Volumes, Cruise 5607, July 1956

Plinklon Volumes, Cruise 5607, July 1956 (cont'd)

Position Time (PST) Vol,water Depth of

Plankton Volujr.es, Cr;ise 5607, July 1956 (cont'd)

.Position

Sta. K.lat. VJ.long.

(1956)Date

Tiuie (PST)

Start End

Vol.water Depth of

strained haulCM, in meters

Vol. per 1000CM. strainedTotal Sm.org,

cc. cc»

93.8093.8593.9097.3097.3297.4097.4597.5097.5597.6097.6597.7097.7597.8097.8597.90100.29100.30100.35100.40100.45100.50100.55100.60100,65100.70100.75100,80100.85100.90103,30103.35103.40103.45103,50103.55103.60103,65103,70103.75103.80103.85103.90

31''10.5'

31°01,8'30°50'

32°15.5'32°11,5'32°03.1'31°51.9'31°40.4'31°28.8«31°17'31°05,8'30°54'30°43'30°34'

30°24.1'30°15'

31°42.731°42,731°33,531°25.231° 17.

4

31°03,930°53.330°42.530°32,330°22.930°13.430°04'

29°53.229°40.831°06.530°52.830°42.730°337'30° 24.130°15.630°08.529°51.829°44.829°35'29°26.1'29°17'29°08'

120^52'121°12'

121°33.7117°0S.4117°16.3117''52.8

118° 12'

118°32.1118° 51.1119° 11'

119°31'

119°50.3120°11'

120°30,4120°50.9121°11'

n6°43'116°46.7117°03.9117°20,9117°37.4118°07.7118°31'

118°53.9119°17,2119°37.4119°59.2120° 20,

9

120°36.8120°47'116° 24'116°52'

117° 12

«

117° 29. 7'

117°48.1'118°06«118°19'

118°39.1'118°51.1'119°13.2'

119°35.4'119°57.3'120° 19. 6'

VII-8VII-8VII-8VII-11VII-11VII-10VII-10VII-10VII-10VII-9VII-9VII-9VII-9VII-9VII-9VII-9VII-11VII-12VII-12VII-12VII-12VII-12VII-12VII-12VII-13VII-13VII-13VII-13VII-13VII-13VI1-15VII-15VII-15VII-15VII -14VII-14VII-14VII-14VII-14VII-14VII-14VII-14VII-13

12461546191616281816092606260316000620361720135610360716

0355005623460026035607161136

14361836

213501160426

0755103113111556111407060316002121261826

1541122610160726040600462136

13011611

19301634183109410641033000212050173514111051073104110111000100410410073111511451185021510131044008111046132616101119072003310035214018411556124010310741042101012151

484488463211460498481503480508531541589456485489541550493513528524485548

515

437586

525

541496195

473506502

471423522

549532

474483

548510

0-1370-1360-1460-500-1350-1200-1400-1330-1380-1240-1250-1120-126

0-U50-1500-1440-1260-1180-1370-1370-1240-1160-1350-1170-1220-1410-1260-1190-1140-1380-220-1360-1170-1330-1320-1410-1270-1200-1310-1390-1380-1210-123

2941729

103815731206130

1872

509115116711341917591

1229804736307531

1032581

12116871450599

1831IA09655

194777871369285

879877611331536

109313241520746

7732634

2312729

103815731130130

1872

509115116711341917591

1229660

654307531941581

1135687

1450599

18311409655194777871369232

790877611331536

109313241520746

7732634

3S

Plankton Volumes, Cruise 5607, July 1956 (cont'd)

Figure 9. -Plankton VolumesAugust 1956

PLANKTON VOLUMES

AUGUST 1956

CC OF PLANKTON PER 1000 CMOF WATER STRAINED

0-33

34-100

^P 101-300

|H 301-900

Hj OVER 900

o STATIONS OCCUPIED

35-

Ifi

Plankton Volumes, Cruise 5607, July 1956 (cont'd)

Figure 10.—Plankton Volxanes

September 1956

42

Planlctoa Voliuaeo, Cruise 56OB, Au;iU3t 1956 (cont'd)

Figure 11.—Plankton VolvmesOctober 1956

PLANKTON VOLUMES

OCTOBER 1956

CC OF PLANKTON PER 1000 CMOF WATER STRAINED

0-33

34-100

101-300

301-900

OVER 900

STATIONS OCCUPIED

A4

Plankton Volumes, Ciniise 5609> September 1956 (cont'd)

Figure 12.—Plankton Volume

a

November 1956

PLANKTON VOLUMES

NOVEMBER 1956

CC OF PLANKTON PER 1000 CMOF WATER STRAINED

0-33

34-100

ipl 101-300

III 301-900

^M OVER 900

o STATIONS OCCUPIED

46

Plankton Volxomes, Ciniise 5610, October 1956 (cont'd)

Figure 13.—Plankton Voltimes

December 1956

PLANKTON VOLUMES

DECEMBER 1956

CC OF PLANKTON PER 1000 CMOF WATER STRAINED

0-33

34-100

"^ 101-300

Bf^ 301-900

^M OVER 900

o STATIONS OCCUPIED

i.8

Plaiikton Volumes, Cruise 5611, November 1956 (cont'd)

Planlcton Volvimes, Cruise $6l2, December 1956 (cont'd)