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

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124 CALIFORNIA COOPERATIVE OCEANIC FISHERIES INVESTIGATIONS1 and 2 show census estimates for sardine and anchovylarvae, respectively, for 1951-59, summarized by yearand area. Census estimates for 1960 are not included,simply because they have not been workedup as yet. The estimates of sardine larvae rangedfrom a high of about 7.3 trillion in 1954 to a low ofabout 1.2 trillion in 1959. Anchovy larvae increasedfrom 15.1 trillion to more than 38 trillion between1951 and 1954, remained at this level through 1957,and then increased further to about 55 trillion in1958 and 1959 (Figure 5). Anchovy abundance appearsto have almost quadrupled during the 1950’s,while sardine abundance progressively decreasedafter 1954. Whereas anchovy larvae outnumberedsardine larvae by less than 3:l in 1951, the ratio hadincreased to more than 45: 1 by 1959. Abundance ofanchovy larvae increased further from 1960 to 1965.Although this change is not shown or expressed inAREA TOTALIILINE 77 81 NORTHN FRANCISCO140 & SOUTHFIGURE 6. Sardine larvae: Annual census estimates by area, 1951-59.
REPORTS VOLUME XI, 1 JULY 1963 TO 30 JUNE 1966125terms of census estimates (only four cruises weremade per year after 1960, rather than 10 to 12),other methods of evaluating the increase indicate thatabundance more than doubled between 1958 and1965.The census estimates permit a better evaluation ofabundance of sardine and anchovy larvae in the 7areas of the CalCOFI region during 1951-59.As already noted, sardine eggs and larvae wereobtained more consistently off central Baja California(lines 110-137) than off northern Baja California andsouthern California (Figure 6). Sardine larvae wereproportionately more abundant, however, off lowercentral Baja California (station lines 123-137) during1951-54 than later. Off northern Baja California(lines 97-107) and southern California (lines 80-93)abundance was low in 1951-53 but proportionatelyhigher during 195659.Throughout the decade only negligible numbers ofsardine larvae were taken off central California (lines60-77) and none off northern California. The numberstaken off southern Baja California (lines 140-157)undoubtedly would have been higher if this area hadN FRANCISCOINT CONCEPTION140 81 SOUTHFIGURE 7. Anchovy larvae: Annual census estimates by area, 1951-59.
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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 VOLUME SI, 1 JULY 1963 TO 3
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REPORTS VOLUIIE SI. 1 JULY 1963 TO
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REPORTS T’OLUME XI, 1 JULY 1963 T
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INFLUENCE OF SOME ENVIRONMENTAL FAC
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REPORTS Y‘OLUJIE XI, 1 JULY 1963
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Page 75 and 76: ~table shows the values calculated
Page 77 and 78: ateREPORTS T-OLTJIT", SI, 1 JULl 19
Page 79 and 80: REPORTS POLGNE SI, 1 JU LY 1963 TO
Page 81 and 82: REPORTS VOLUXE XI, 1 JULY 1963 TO 3
Page 83 and 84: REPORTS VOLUME XI, 1 JULY 1963 TO 3
Page 85 and 86: _________--_____REPORTS VOLUJIE SI,
Page 87 and 88: REPORTS TOLTIJIE SI, 1 JULY 1963 TO
Page 89 and 90: -20/5-0 10-f 5-w 25-0 20-= 15-: 10-
Page 91 and 92: REPORTS VOLUNE SI. 1 JULY 19G3 TO 3
Page 97 and 98: REPORTS VOLURlE SI, 1 JULY 1963 TO
Page 107 and 108: THE PREDATION OF GUANO BIRDS ON THE
Page 109 and 110: iod and after 8 AM during the rest
Page 115 and 116: FISH E RYThe California anchovy fis
Page 117 and 118: ~~ ::REPORTS VOLUME XI, 1 JULY 1963
Page 119: CO-OCCURRENCES OF SARDINE AND ANCHO
Page 122 and 123: 120 CALIFORNIA COOPERATIVE OCEANIC
Page 124 and 125: CALIFORNIA COOPERATIVE OCEANlC FISH
Page 128 and 129: 126CALIFORNIB COOPERATIVE OCEANIC F
Page 132 and 133: ~~ ~130 CALIFORNIA COOPERATIVE OCEA
Page 134 and 135: 132 CALIF0RhTTIA COOPERATIVE OCEANI
Page 138 and 139: THE ACCUMULATION OF FISH DEBRIS IN
Page 143 and 144: PART IllSCIENTIFIC CONTRIBUTIONS
Page 147 and 148: REPORTS VOLUME SI, 1 JULY 1963 TO 3
Page 151 and 152: REPORTS VOLU&IE XI, 1 JULY 1963 TO
Page 157 and 158: SUMMARY OF THERMAL CONDITIONS AND P
Page 159 and 160: SEASONAL VARIATION OF TEMPERATURE A
Page 163 and 164: including the semiannual harmonic?
Page 167 and 168: REPORTS VOiLUME XI, 1 JULY 1983 TO
Page 169: REPORTS VOLUME XI, 1 JULY 1963 TO 3
Page 172 and 173: 170 CALIFORNIA COOPERATIVE OCWIC FI
Page 174 and 175: 172 CALIFORNIA COOPERATIVE OCBANIC
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174 CALIFORNIA COOPERATIVE OCEANIC
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184CALIFORNIA COOPERATIVE OCEANIC F
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CONTENTSI. Review of Activities Pag
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