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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)
Recommended