CalCOFI Reports, Vol. 11, 1967 - California Cooperative Oceanic ...

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154 CALIE’ORXIA COOPERATlVE OCEAXIC FISHERIES INVESTIGATIOKSWater below the California Current and its extensionto the south-west.4. Seasonal variation of occurrence of pelagic individualsin the coastal areas is rather slight, consistingonly of a tendency for higher frequencies ofoccurrence in the first half of the year ; however, theannual variation is very striking and a very extensivemovement towards the north can be demonstratedduring the years 1958-1960, culminating in occurrencesto the north of Point Conception. This movementcan be explained by reference to the changedpatterns of transport in the oceanographic regimeduring this period, the patterns of geostrophic flowcorresponding very well to what is required to explainthe observed movements of crabs.5. The relation between the benthic and pelagicphases appears to be complex, and it is suggested thatduring the first two years of life an individual mayeither be retained within the coastal eddies andalternate between benthic and pelagic environments,or it may be flushed out to the south-west with thepossibility of returning subsequently to the coastalareas on the undercurrent within the first year or soof life; individuals older than this have not beenfound far offshore and are supposed either to havesuccumbed or to have returned to the coastal area.After the end of the second year of life the benthichabit appears to be finally adopted and no individualsolder than this have been taken in the pelagic phase.ACKNOWLEDGMENTSThis work was performed under the Scripps TunaOceanography Research (STOR) Program supportedby the Bureau of Commercial Fisheries under Contracts14-17-0007-221 and 14-17-0007-306. The manuscriptwas read by M. Blackburn, J. L. Reid, Jr. andG. I. Murphy to whom the author is grateful for anumber of useful comments.REFERENCESAhlstrom. E. H. 1948. ,4 record of pilchard eggs and larvaecollected during surveys made in 193S1941. U.S. Fish. Wild.Serv., Spec. Soi. Rept., (54) :1-54.Alverson, F. G. 1963. The food of the yellowfin and skipjacktunas in the eastern tropical Pacific. Inter-Amer. Trop. TunaComm. Bull., 7(5) :295-396.Beklemishev, K. V. 1960. The secret of concentrations of crustaceansoff the Mexican coast. Priroda (2) 397-98.Berner, L. S., and J. L. Reid, Jr. 1961. On the response to changingtemperature of the temperature-limited plankter Doliolumdenticulatum Quay and Gainard, 1835. Limnol. Oceangr.6(2) :205-215.Blackburn. M. In press. Micronekton of the eastern tropical PacificOcean : family composition, distribution, ahundance, andrelationships to tuna. U.S. Fish. Wild. Serv., Fish. Bull.Boyd, C. M. 1963. Distribution, trophic relationships, growthand respiration of a marine decapod crustacean Pleuroncodesplanipes Stimpson (Galatheidae) Ph. D. Thesis, Univ. Calif.(Sa% Diego) :67 p.California Cooperative Oceanic Fisheries Investigations. 1963.CalCOFI Atlas of 10-meter temperatures and salinities, 1949through 1959. Calif. Mar. Res. Comm., Atlas, no. 1.Glynn, P. W. 1961. First mass stranding of pelagic crabs (Pleuroncodesplanipes) at Monterey Bay, California, since 1859with notes on their biology. Calif. Fish and Game, 47(1) :97-107.Johnson, &I. W. 1960. Production and distribution of larvae ofthe spiny lobster Panzdirus interuptus (Randall) with recordson P. gracilis Streets. Scripps Inst. Oceanogr., Bull.,7(6) :413462.King, J. E., and R. T. B. Iversen. 1962. Midwater trawling forforage organisms in the Central Pacific 1951-1956. U.S. Fish.Wild. Serv., Fish. Bull., 62(210) :271321.Nicol, E. A. T. 1932. The feeding habits of the Galatheidae.Mar. Biol. Assoc. U.K., J., 18:87-106.Matthews, L. Harrison. 1932. Lobster-krill, anomuran Crustaceawhich are the food of whales. Discovery Repts., 5:467-484.McHugh, J. L. 1952. The food of albacore ((fernzo alalunga)off California and Baja California. Scripps Inst. Oceangr.,Bull., 6(4) ~161-172.Parker, R. H. 1963. Zoogeography and ecology of some macroinvertebrates,particularly molluscs, in the Gulf of Californiaand the continental slope of Mexico. Vidensk. Yeddr.Dansk. Natruh. Foren., 126 :1-178.Radovich, J. 1961. Relationships of some marine organisms ofthe northeast Pacific to water temperatures. Calif. Dept. Fishand Came, Fish. Bull., (112) :1-62.Reid, J. L., Jr. 1960. Oceanography of the northeastern PacificOcean during the last ten years. Calif. Coop. Ocean. Fish.Invest., Repts., 7 57-90.-1965. Intermediate waters of the Pacific Ocean. Johns HopkinsOceanogr. Stud., 2 :1-85.Reid, J. L., Jr., Gunnar I. Roden and John G. Wyllie. 1959.Studies of the California Current system. Calif. Coop. Ocean.Fish. Invest., Prog. Rept., 1 July 1956-1 Jan. 1958, :28-57.Scripps Institution of Oceanography. 1965. Progress report forthe year 1964-1965. Univ. Calif., SI0 Ref. 65-10, IMR Ref.65-13.Sette, 0. E., and J. D. Isaacs, (Ed.). 1960. Symposium on “Thechanging Pacific Ocean in 1957 and 1958,” Rancho Sante Fe,Calif., June 24, 1958. Calif. Coop. Ocean. Fish. Invest. Prog.Rept., 7 :13-217.Stimpson, W. 1860. Notes on North American Crustacea in theMuseum of the Smithsonian Institution. (2). Lyceum Nut.His. New York, Ann., 7 :245-246.Sverdrup, H. V., M. W. Johnson and R. H. Fleming. 1942. Theoceans, their phvsics, chemistry and general hiology. Prentice-Hall, New York. 1087 p.Thrailkill, J. R. 1956. Relative areal zooplankton abundanceoff the Pacific coast. U.S. Fish. Wild. Serv., Spec. Sci. Rept.:Fish., (188):1-185.
SUMMARY OF THERMAL CONDITIONS AND PHYTOPLANKTON VOLUMESMEASURED IN MONTEREY BAY, CALIFORNIA1 961 -1 966DONALD P. ABBOTT and RICHARD ALBEEHopkins Marine Station of Stanford UniversityFor thirteen years under the California CooperativeOceanic Fisheries Investigations Program theHopkins Marine Station of Stanford University hasmonitored the marine climate and phytoplanktonof Monterey Bay. Approximately weekly cruises tosix regular stations on the bay are made on the R/VTAGE. The information gathered is compiled anddistributed to interested organizations and individualsin the form of mimeographed quarterly and annualdata reports. A previous paper (Bolin and Abbott,1963) describes the stations occupied and theprocedures followed in sampling and analysis, andpresents a summary of results obtained through De-,cember 1960. The present report summarizes some ofthe findings in the period January 1961 through De-.cember 1966, and brings up-to-date the curves shownin Figures 2A-B and 5A of the earlier paper.Thermal conditions are shown in Figures 1A and1B of the present report. In Figure la, the middle ofthe three curves depicts the monthly average of allsurface temperatures taken on all cruises during eachmonth. The upper curve (average monthly maximum)shows monthly averages of the warmest surface temperaturerecorded on each cruise during the month.The lower curve (average monthly minimum surfacetemperature) is similarly derived.The main hydrographic seasons on the bay areclearly indicated by the curves in Figures 1A and1B. Divergence between average monthly maximumand average monthly minimum surface temperatures(upper and lower curves in Figure lA, solid line inFigure 1B) occurs when upwelling of colder waterover the Monterey Submarine Canyon lowers the temperaturesin the center of the bay without bringingabout correspondingly large drops in surface temperaturesat the northern and southern limits of thebay. Upwelling is also accompanied by a marked increasein the thermal gradient in the upper 50 meters(Figure lB, broken line). The thermal gradient maypersist for a time in the late summer and early fallafter upwelling has declined (compare solid andbroken lines, Figure lB, for August through OctoberFIGURE 1. Monthly averages of temperature conditions and the volume of the phytoplankton standing crop in Monterey Bay, California, 1961through 1966. A. Surface temperature ("C), showing monthly means, average monthly maxima, and average monthly minima. B. Solid line-temperaturedifference ("C) between average monthly maximum and average monthly minimum surface temperatures; broken line--temperature difference("C) between monthly means of temperatures at the surface and those at 50 meters depth. C. Monthly averages of the volume of the phytoplanktonstanding crop (ml/haul).( 155 )
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STATE OF CALIFORNIAMARINE RESEARCH
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STATE OF CALIFORNIADEPARTMENT OF FI
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RONALD REAGAXGovcriwr of the Slate
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PART 1REVIEW OF ACTIVITIESJuly 1,19
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REPORTS YOLUAIE SI, 1 JULY 1963 TO
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REPORTS VOLUNE XI, 1 JULY 1963 TO 3
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REPORTS YOLUME SI, 1 JULY 1963 TO 3
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REPORTS VOLUME XI, 1 JULY 1963 TO 3
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REPORTS vor,uiwIi; SI, 1 JULY 1063
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REPORTS TOT2T71\IF: SI, 1 JUJIT 196
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IiEPOHTS TOLUME XI, 1 JULY 1963 TO
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REVIEW OF THE PELAGIC WET FISHERIES
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KEI'OiiTH TOLUJIE SI, 1 JULY 1963 T
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PART IISYMPOSIUM ON ANCHOVIES, GENU
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OCEANIC ENVIRONMENTS OF THE GENUS E
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KEI'OKTS VOLIXI.: SI, 1 JULY 1963 T
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~~~REPORTS VOLUME XI, 1 JULY 1963 T
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REPORTS VOLUME SI, 1 JULY 1963 TO 3
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130'E 132' 134' 136' 138' 140' 142-
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REPORTS VOLUSIE SI, 1 JULY 1963 TO
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KI3I’ORTH VOLUJIE XI, 1 JULY 1963
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REPORTS VOLUIIE SI. 1 JULY 1963 TO
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INFLUENCE OF SOME ENVIRONMENTAL FAC
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REPORTS Y‘OLUJIE XI, 1 JULY 1963
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~table shows the values calculated
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ateREPORTS T-OLTJIT", SI, 1 JULl 19
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REPORTS POLGNE SI, 1 JU LY 1963 TO
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REPORTS VOLUXE XI, 1 JULY 1963 TO 3
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_________--_____REPORTS VOLUJIE SI,
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REPORTS TOLTIJIE SI, 1 JULY 1963 TO
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-20/5-0 10-f 5-w 25-0 20-= 15-: 10-
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REPORTS VOLUNE SI. 1 JULY 19G3 TO 3
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REPORTS VOLURlE SI, 1 JULY 1963 TO
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Page 115 and 116: FISH E RYThe California anchovy fis
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Page 190: CONTENTSI. Review of Activities Pag
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