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

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132 CALIF0RhTTIA COOPERATIVE OCEANIC FISHERIES INVESTIGATIONSThe problem then is to account for the highernumber of each species in hauls in which they cooccurred-todetermine whether they mere obtainedin centers of heavier spawning for both species orwhether survival was better in areas of co-occurrence.If the latter were true, it would be difficult to justifyany hypothesis that postulates that competition betweenthe two species would adversely affect theirsurvival.The average numbers of larvae per positive haulare summarized by size and year in Tables 10 to 15.For each species these data are summarized in threeways : (1) for all occurrences, (2) for hauls in whichthe larvae of one species eo-occurred with those ofthe other, and (3) for hauls in which the larvae ofa species occurred alone.A semi-log plot (Figures 11 and 12) gives a simplemethod of illustrating changes in abundance withSARDINE LARVAE-OCCURRINGSize class (mm) 1I1951TABLE 12ALONE (NO ANCHOVY LARVAE): AVERAGE NUMBER PER POSITIVE HAUL (X lo'), SUMMARIZEDBY SIZE AND YEAR, 195140-3.3----Year1952 1953 1954 1955 I 1956 1957 1958I810 2,604 1,922 1,276 1,217 1.257 1,826 222357 2,619 2,237 1,562 1,236 2,306 1,552 505249 1,307 859 746 820 696 712 510166 503 266 346 436 201 448 465129 298 158 267 340 1 198 699 32672 212 183 199 154 198 407 22683 149 101 144 132 158 318 17148 78 192 73 78 146 286 6851 71 72 42 74 61 204 6831 48 120 33 69 54 173 2747341319.619.63.38.2--02,140.744742143.943.613.020.2_-1438,291.761564346.610.7--__--06,327.34234106.26.04.5-___04,790.758592936.49.599473889.884.862.98.7__0 15______4,751.2 5,720.250181439.238.9-_-___66,791.11393448.112.2---__-02,704.31959 11960;li I 1,352.7i! 1 256.0Unweightedaverage~ ~ _ _ _11,580 1,059 1,377.3952228 626.9140 303.762578257389142262827.014.014.0--2529-_364428173.3136.7102.671.769.048.435.7_- 35.7:: 1 23.0:: 1 3.7__ I 23.910.1_- 0.0TABLE 13ANCHOVY LARVAE-ALL OCCURRENCES: AVERAGE NUMBER PER POSITIVE HAUL (x lo2), SUMMARIZED BY SIZE AND YEAR, 1951-60Size class (mm) I1951Year1952 1953 1954 1955 1956 1957195819591960Unweightedaverage2,2661,7681,3801,5401,4712,3562,9742,6111.8521,5924,3963,2212,6252,5642,6373,1984,7242,7893,0092,5542,6113,9642,8852,7323,1203,4474.0763.4323,1562,9564,1815,4763,4933,3172,8374,7915,1042,6882,4122,1737,2665.5364,2403,6242,9083,538.33,771.42,722.42,537.02,335.51,2678465613702411,18289 16764242681,9251,4189135813762,0521.5731,1127123882,8182,3061,8571,2737512,5152,0551,4518885582,2431,6801,1357644941.8091,3491,0317024072,0061,34092857839 11,854.01,391.1996.7647.9401.813574644362.912988513035.2239132844940.2237136854966.84021941005157.83121621015467.53111771096567.02771811209291.32431541156381.3236.1134.185.751.558.428.420.913.72312.57.811.62123.54.44.23623.47.08.62740.52.87.4416.811.36.81329.18.93.11037.89.93.08836.89.511.437825.38.58.270.612,174.9 15,212.1 21,268.3 22,750.8 25,176.525,278.426,400.123,366.029,909.020,874.5--
~~~~REPORTS VOLUME XI, 1 JULY 1963 TO 30 JUNE 1966 133increase in size. Two curves are plotted for each species,one illustrating abundance of eo-occurring larvae,the other of the species taken alone.The two curves for anchovy larvae tend to convergewith increase in size. This convergence would be expectedif survival were better in hauls in which thelarvae of a species occurred alone, free from competition.It is well to remember that the upper curverepresents the average of 1,489 hauls and the lowerthe average of 5,266 hauls-large amounts of data.Data on changes in relative abundance with increasein size are less consistent for sardines. Theupper curve, sardine larvae in eo-occurrences withanchovy larvae, necessarily is based on the same numberof hauls as is its counterpart graph for anchovies(1,489), but the lower curve is based on considerablyANCHOVY LARVAE-CO-OCCURRINGTABLE 14WITH SARDINE LARVAE: AVERAGE NUMBER PER POSITIVE HAUL (x 10% SUMMARIZED BySIZE AND YEAR, 1951-6019521953 1954______1955Year1956 1957 1958 I 1959 1960--Unweightedaverage2,8362,6002,2112,5972,6082,6484,5782,5092,2181,9926,7734,3103,7913,4153,9542,9975,8773,6183,6873,7232,4715,0574,8184,7893,9961,3263,3363,5994,7414,0156,83214,6349,1168,5507,13811,38512,8544,6554,0513,46111,1898,7807,4786,9205,4374,998.16,355.14,422.74,325.03,802.42,3751,4959346243541,4451,0167465463602,7082,0631,4068594683,2252,3981,9001,0226443,3642,7021,9751,4601,1173,5793,7002,8791,8191,2465.020 3.0113;559 2,6072,292 2,0081.485 1.294974 6903,7082,2321,3137285702,963.72,249.81,587.61,007.3660.516969945576.3184149994851.5261132914457.641322616294137.05612661635684.861926916294149.966838119210050.246322115610969.13252191194549.8372.3197.8126.965.474.241.127.525.42712.24.417.11829.24.9_-3045.714.913.02825.0_-__013.07.77.5628.111.05.8534.59.54.027516.113.6__34324.69.57.378.519,218.318,641.230,396.730,224.632,904.831,568.161,041.147,357.149,485.533,328.8TABLE 15ANCHOVY LARVAE-OCCURRING ALONE (NO SARDINE LARVAE): AVERAGE NUMBER PER POSITIVE HAUL (X ld), SUMMARIZED BY SIZEAND YEAR, 1951-60I-Size class (mm) I 1951I-3,269 2,6464,324 3,6852.502 2.3922;7742,1482;2062,8961,6451,286838604299IYear___I Un-1952 1953 1954 1955 I 1956 1957 1958 19591,9941,3719841,03793074053638425018711976503856.522.417.78.1222,2732,5212,6401,7481,4791,10785565739024311470372630.612.68.710.0223,3432,7392,1092,1872,0541,5791,133694458335229132825132.421.04.26.138175105583342.415.74.27.0272,6782,2051,8271,225658362175845050.844.53.59.353,9454,2503,3942,7862,7092,2671,6701,117670397241137874448.317.612.16.6143,4592,9751,9581,8881,6631,4851,168820568363214121875671.629.48.32.4123,4173,4902,2772,0711,9041,5591,0888285793482391731128996.038.59.92.8498,822.7 14,243.9 17,226.7 20,156.3 I 23,202.1 23,812.6 16,948.7 18,370.2weighted1960 average--6,7115,0773,7943,1582,5511,7661,2148735573662311451156585.83,166.43,103.92,258.62,056.81,920.11,535.51,149.7829.2546.8332.5200.6117.673.947.552.724.713.1 8.3
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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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~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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Page 85 and 86: _________--_____REPORTS VOLUJIE SI,
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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
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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
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Page 124 and 125: CALIFORNIA COOPERATIVE OCEANlC FISH
Page 128 and 129: 126CALIFORNIB COOPERATIVE OCEANIC F
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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
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Page 172 and 173: 170 CALIFORNIA COOPERATIVE OCWIC FI
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182 CALIFORNIA COOPERATIVE OCEANIC
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184CALIFORNIA COOPERATIVE OCEANIC F
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186 CALIFORNIA COOPERATIVE OCEANIC
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CONTENTSI. Review of Activities Pag
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