CalCOFI Reports, Vol. 27, 1986 - California Cooperative Oceanic ...

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MacGREGOR: SEEASTES ABUNDANCECalCOFI Rep., Vol. XXVII, 1986TABLE 3Rockfish Larvae 14-Year Annual AveragesCalCOFIline606367707377Total (60-77)8083879093Total (80-93)Number(billions)16,04415,77912,6855,3294,2016,15960,1977,47612,89616,3269,7915,0945 1,583Percent11.84111.6469.3623.9333.1014.54644.4295.5189.51812.0497.2263.76038.071Icz0tmU\ JAN-FEE\\,P'/'MAR-APRA/97100103107Total (97-107)110113117120Total (110-120)123127130133137Total (123-137)140143147150153157Total (140-157)Total (60-157)3,2752,9731,7751.4199,4421,4482,0143,9442,1829,5881,33688 15798245394,1591286423768817522135,4912.4172.1941.3101.0486.9691.0691.4862.9111.6107.0760.9860.6500.4280.6080.3983.0700.0940.0470.1750.0500.0060.0130.385100.000high spawning effort and/or low early mortality ratherthan random fluctuations resulting from inadequatesampling.The 14-year average number of larvae by CalCOFIline (Table 3) shows high abundance levels in the SanFrancisco-Monterey area (lines 60-67). These linesaccount for 33% of the larvae found in the main surveyarea (30 lines, 60-157). Sparse data for the six linesnorth of line 60 (lines 40-57) indicate a populationequal to about 75% of the population in the arearepresented by the six lines 60-77, with about a third oftF lo;060-77 80-93 97-107 110-120123-137CalCOFl LINESFigure 2. Percent of total year's rockfish spawning occurring in January/February and MarchiApril for five areas as measured by larvae (14-yearaverage).these larvae found on line 57. Along the exposed coastsouth of Monterey (line 70) the larval abundancedecreases to Point Conception (line 80). In the ChannelIslands area (lines 83-90) larval abundance again increases.These three lines account for 29% of the larvaefound in the main survey area. The number of larvaecontinues to decrease southward to line 157 with onesmaller increase in the area around and north of PuntaEugenia and Cedros Island (lines 113-120).The spawning season appears to be later farthersouth (Figure 2). April is the peak spawning month offMexico (lines 97-137). This area accounts for only17%% of the total average yearly production ofrockfish larvae, in contrast to 82%% for U.S. waters(lines 60-93), which tends to mask this seasonalphenomenon (Table 3). The increase in late spawningin the more southern areas is probably due to increasedproportions of late-spawning species of rockfishes likethe Mexican rockfish and the subgenus Sebastomus(Chen 1971), which become relatively more abundantin the rockfishes' southern range.Estimates of the numbers of all rockfishes, S.jordani, and S. macdonaldi were calculated by monthand line for 1956, 1966, 1972, and 1975, and of S.paucispinis and S. levis for 1956, 1969, 1972, and1975'. A summary of the estimated larval abundanceby year and month (Table 4) shows that the seasonaldistribution of all rockfish larvae for the 5 selected'Tables to be issued as an administrative report of the Southwest FisheriesCenter.124
MacGREGOR: SEBASTES ABUNDANCECalCOFI Rep., Vol. XXVII, 1986MonthJan.Feb .Mar.Apr.MayJuneJulyAug .Sept .Oct.Nov .Dec .TotalsS. paucispinisJan.Feb.Mar.Apr.MayJuneJulyAug .Sept.Oct.Nov .Dec .TotalsS. jordaniJan.Feb.Mar.Apr.MayJuneJulyAug .Sept .Oct.Nov .Dec .TotalsS. levisJan.Feb.Mar.Apr .MayJuneJulyAug.Sept.Oct.Nov .Dec .TotalsTABLE 4Estimated Larvae (Billions) from CalCOFl Lines 60-1 37 (60-1 57 for Sebastes macdonaldi) for All Rockfish,and Four Species of RockfishAll RF 1956 1966 1969 1972 1975 Mean Percent24,018 24,736 38,560 48,378 28,617 32,862 19.76663,875 27,401 77,687 30,567 46,245 49,155 29.56637,967 23,878 40,409 30,382 28,165 32,160 19.3449,886 20,845 25,792 16,617 16,573 17,943 10.7925,763 8,812 9,156 12,110 5,129 8,194 4.9294,2648,003 7,578 5,484 5,469 6,160 3.7054,295 6,075 6,363 4,886 3,252 4,974 2.9925,6831,438 3,102 2,681 2,675 3,116 1.8740 2,196 2,809 1,966 1,961 1,786 1.0752,1211,989 1,693 2,2081,805 1,963 1.1811,376474 3,755 2,620 3,241 2,298 1.3798,929 3,420 2,074 4,878 8,939 5,648 3.397168,177 129,267 218,978 162,777 152,071 166,254 100.000548351514651717000001331,6451,61114,3002,96249223000000019,38840008000000002,7618,1182,0176670000000013,563002,6512,9341,374462170200000121687,7911,61120,9324,1861,18311394230017028,07856170931 I9IS02300048 476Year3,9661,6151,38833330417000131234 17,9893,5512,4262,5413643101011001109,215214531187700000003992,0501,69395223582240006194765,5372,16010,5902,4196664630210066015,971574164144139000000001,0212,3041,6481,057274143200005112805,7422,33911,2732,8256749831110019017,24322 197896860600000487(Table 4 coniinued40.13128.71318.4134.7692.4950.3400.0000.0000.0000.0830.1874.869100.00013.56465.37816.3833.91 10.5710.0150.0050.0640.0000.0000. IO90.000100.00045.47319.90818.26114.0431.1320.0001.1830.0000.0000.0000.0000.000100.000on next page)125
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REPORTSVOLUMECICTCIBERXXVll1986
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EDITOR Julie OlfeSPANISH EDITOR Pat
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COMMITTEE REPORTCalCOFI Rep., Vol.
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FISHERIES REVIEW: 1985CalCOFl Rep.,
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FISHERIES REVIEW: 1985CalCOFI Rep.,
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BINDMAN: 1985 NORTHERN ANCHOVY SPAW
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~~ ~BINDMAN: 1985 NORTHERN ANCHOVY
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WOLF AND SMITH: MAGNITUDE OF SARDIN
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PUBLICATIONSCalCOFI Rep., Vol. XXVI
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Part I1SYMPOSIUM OF THE CALCOFI CON
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PETERSEN ET AL.: NEARSHORE HYDROGRA
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LAVENBERG ET AL.: SOUTHERN CALIFORN
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STEPHENS ET AL.: LARVAL FISH RECRUI
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Page 87 and 88: LOVE ET AL.: INSHORE SOFT SUBSTRATA
Page 109: Part 111SCIENTIFIC CONTRIBUTIONS
Page 112 and 113: BAILEY ET AL.: FORECASTING HAKE REC
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Page 116 and 117: ESPINO AND WOSNITZA-MENDO: PERUVIAN
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ARCOS AND FLEMINGER: CALANOID COPEP
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TRUJILLO-ORTIZ: ACARTlA CALIFORNIEN
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TRUJILLO-ORTIZ: ACARTIA CALIFORNIEN
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TRUJILLO-ORTIZ: ACARTIA CALlFORNlEN
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TRUJILLO-ORTLZ: ACARTIA CALIFORNIEN
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CHEN: VERTICAL DISTRIBUTION OF PELA
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CHEN: VERTlCAL DISTRIBUTlON OF PELA
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JOOCHEN: VERTICAL DISTRIBUTION OF P
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BRINTON ET AL.: GULF OF CALIFORNIA
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METHOT: FRAME TRAWLCalCOFI Rep., Vo
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