20 CALIFORNIA COOPERATIVE OCEBPTIC FISHERIES ISVESTIGATIONSgiven size the rate of intake by weight on small foodorganisms is constant for as long as 1 hour after thestart of feeding, whereas the rate of intake on largeorganisms starts at a much higher level and declinesrapidly. In less than an hour it is at a lower level thanthe constant rate on small organisms. Such information,along with the answers to a number of relatedquestions, the effect of light intensity and temperatureon feeding rates, for example, will lead to an understandingof what variations in plankton abundancemeans to the fish in terms of food availability.Feeding, Growth, Bespiration, and Carbon Ctilizaiionof Eupliaicsiid Nzrinap. An experimental studywas made of the biology of the euphausiid shrimp,Eicphnnsia pacifica, describing growth, feeding, respiration,molting, and the efficiency with which it incorporatescarbon from its food into body tissue.Among planktonic organisms in the food web of theoceans, euphausiid crustaceans rank high in abundanceand importance. They are food for a varietyof fishes, ranging from sardine and jack mackeralto tunas and salmon, and are the chief food of baleenwhales.The experimental studies were dependent uponsuccessful maintenance of euphausiids in the laboratory.Techniques were developed that permitted normalgrowth and development of euphausiids in thelaboratory j some experimental animals were kept forover one year.The euphausiid shrimp studied. E. pacifica, is anomnivorous feeder, utilizing both algae and smallzooplankton animals. In the laboratory, crustaceannauplii seemed to be preferred food over unicellularalgae, but both were eaten when arailable.Growth in euphausiids, as in all crustaceans, is accompaniedby molting. Euphausiids kept in the laboratoryat temperatures similar to those at which theanimal lives in the sea (9-15°C) were observed tomolt on the average every 5 days. The dry weight ofeach molt is approximately 10 percent (range 4-14percent) of the dry weight of the tininial which producedit. Molts contained approximately 46 percentash, 17 percent organic carbon, and 2.5 percent organicnitrogen. Each molt contained about 4 percent of theorganism’s carbon, 2 percent of its nitrogen.Assimilation of ingested carbon (digestion) appearedto be high, usually over 80 percent, as judgedfrom tracer experiments with carbon-14. Respirationaccounted for the major portion of the assimilatedcarbon-62 to 87 percent. The long tertii loss of carbondue to molting ranged from 6 to <strong>11</strong> percent. Thefraction of assimilated carbon calculated to appearin eggs was 9 percent. In young individuals withrapid growth, incorporation of assimilated carbon intobody tissue was as high as 30 percent, in older individualswith slower growth it was as low as 6 percent.Calculations from an oceanic population gave 9 percentas level of incorporation of organic carbon intotissue (excluding eggs and molts) over the life spanof the animal.
REVIEW OF THE PELAGIC WET FISHERIESFOR THE 1963-64, 1964-65, 1965-66 SEASONSDuring the past 20 years the Pacific mackerel,jack mackerel and sardine fisheries have been majorcontributors to <strong>California</strong>’s pelagic wet-fish landings.In the same period the northern anchovy fishery wasconsiderably less important, being relegated primarilyto fresh fish and live-bait landings. In recent yearsthe sardine population has declined drastically andthe anchovy has taken on new significance with theauthorization of a fishery for reduction in 1965(Table 1).TABLE 1LANDINGS OF PELAGIC WET-FISHESIN CALIFORNIA IN TONS, 1962-1966I Sar- I An- I Pacific 1 1 JackYear dines chovies mackerel mackerel Herring Squid1962 _ ____1963 ____1964 ____1965 _____1966* ____7,682 1,382 24,289 44,990 653 4,6843,566 2,285 20,121 47,721 315 5,7806,569 2,488 13,414 44,846 175 8,217962 2,866 3,525 33,333 258 9,310450 31,089 2,004 20,580 120 8,798Total__-83,68079,78875,70950,25463,041Point Lopez. The southern <strong>California</strong> catch cameprincipally from Santa Catalina Island, with smallerquantities taken at Horseshoe Kelp, San NicolasIsland and between Santa Cruz and Anacapa Islands.Year <strong>California</strong> Baja <strong>California</strong>_____1962-63__._.._.__._ 4,172 14,6201963-64---------_-- 2,942 18,3841964-65 ___......... 6,103 27,1201965-66*--_--__-_-_ 719 22,247Total18,79221,32633,22322,966a Preliminary.The vessels harvesting these species consist primarilyof purse seiners, lampara boats. and scoopboats. During the past 4 years, vessels have continuedto leave the fishery; the fleet declining from 69 vesselsin 1963 to 54 in 1966. Most of the loss was in the largepurse seine group (over GO feet) which decreasedfrom 38 to 29 vessels.The fleet operating from Baja <strong>California</strong> portsduring the period 1963 through 1966 remained fairlystable, between 30 and 32 boats.The demand for wet-fish was good during the past4 years with cannery imposed vessel limits generally50 tons or more. Concomitantly there was a gradualincrease in the price paid to the fishermen withsardines increasing from $60 to $75 per ton and jackmackerel and Pacific mackerel rising from $42.50 to$75 per ton.SARDINES1963-64 Period (June through May)For the second consecutive year, cannery seasonlandings dropped to an all-time-low. Central <strong>California</strong>landings (August 1, 1963 to March 1, 1964)amounted to only 943 tons. Southern <strong>California</strong> landings(September 1, 1963 to March 1. 1964) wereslightly higher at 1,089 tons. Samples from both areasindicated 62 percent of the catch was produced bythe 1958 and 1959 year-classes. Statewide landingsfor the 1963-64 period were 2,942 tons,In central <strong>California</strong>, primary areas of catch wereMonterey Bay and the coastal areas from Point Sur to(21)
- Page 1 and 2: STATE OF CALIFORNIAMARINE RESEARCH
- Page 3 and 4: STATE OF CALIFORNIADEPARTMENT OF FI
- Page 5 and 6: RONALD REAGAXGovcriwr of the Slate
- Page 7 and 8: PART 1REVIEW OF ACTIVITIESJuly 1,19
- Page 9 and 10: REPORTS YOLUAIE SI, 1 JULY 1963 TO
- Page 11 and 12: REPORTS VOLUNE XI, 1 JULY 1963 TO 3
- Page 13 and 14: REPORTS YOLUME SI, 1 JULY 1963 TO 3
- Page 15 and 16: REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 17 and 18: REPORTS vor,uiwIi; SI, 1 JULY 1063
- Page 19 and 20: REPORTS TOT2T71\IF: SI, 1 JUJIT 196
- Page 21: IiEPOHTS TOLUME XI, 1 JULY 1963 TO
- Page 25 and 26: KEI'OiiTH TOLUJIE SI, 1 JULY 1963 T
- Page 27 and 28: REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 29 and 30: PART IISYMPOSIUM ON ANCHOVIES, GENU
- Page 31 and 32: OCEANIC ENVIRONMENTS OF THE GENUS E
- Page 33 and 34: KEI'OKTS VOLIXI.: SI, 1 JULY 1963 T
- Page 35 and 36: REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 37 and 38: REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 39 and 40: REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 41 and 42: ~~~REPORTS VOLUME XI, 1 JULY 1963 T
- Page 43 and 44: REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 45 and 46: REPORTS VOLUME SI, 1 JULY 1963 TO 3
- Page 47 and 48: 130'E 132' 134' 136' 138' 140' 142-
- Page 49 and 50: REPORTS VOLUSIE SI, 1 JULY 1963 TO
- Page 51 and 52: REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 53 and 54: REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 55 and 56: REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 57 and 58: KI3I’ORTH VOLUJIE XI, 1 JULY 1963
- Page 59 and 60: REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 61 and 62: REPORTS VOLUME SI, 1 JULY 1963 TO 3
- Page 63 and 64: REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 65 and 66: REPORTS VOLUIIE SI. 1 JULY 1963 TO
- Page 67 and 68: REPORTS T’OLUME XI, 1 JULY 1963 T
- Page 69 and 70: INFLUENCE OF SOME ENVIRONMENTAL FAC
- Page 71 and 72: REPORTS Y‘OLUJIE XI, 1 JULY 1963
- Page 73 and 74:
REPORTS VOLUME XI, 1 JULY 1963 TO 3
- 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 93 and 94:
REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 95 and 96:
REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 97 and 98:
REPORTS VOLURlE SI, 1 JULY 1963 TO
- Page 99 and 100:
REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 101 and 102:
REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 103 and 104:
REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 105 and 106:
REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 107 and 108:
THE PREDATION OF GUANO BIRDS ON THE
- Page 109 and 110:
iod and after 8 AM during the rest
- Page 111 and 112:
REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 113 and 114:
REPORTS VOLUME XI, 1 JULY 1963 TO 3
- 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 126 and 127:
124 CALIFORNIA COOPERATIVE OCEANIC
- Page 128 and 129:
126CALIFORNIB COOPERATIVE OCEANIC F
- Page 130 and 131:
128 CALIFORNIA COOPERATIVE OCEANIC
- Page 132 and 133:
~~ ~130 CALIFORNIA COOPERATIVE OCEA
- Page 134 and 135:
132 CALIF0RhTTIA COOPERATIVE OCEANI
- Page 136 and 137:
134 CALIFORNIA COOPERATIVE OCEANIC
- Page 138 and 139:
THE ACCUMULATION OF FISH DEBRIS IN
- Page 140 and 141:
138 CALIFORNIA COOPERATIVE OCEANIC
- Page 143 and 144:
PART IllSCIENTIFIC CONTRIBUTIONS
- Page 145 and 146:
REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 147 and 148:
REPORTS VOLUME SI, 1 JULY 1963 TO 3
- Page 149 and 150:
REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 151 and 152:
REPORTS VOLU&IE XI, 1 JULY 1963 TO
- Page 153 and 154:
REPORTS VOLUME XI, 1 JULY 1963 TO 3
- Page 155 and 156:
REPORTS VOLUME SI, 1 JULY 1963 TO 3
- Page 157 and 158:
SUMMARY OF THERMAL CONDITIONS AND P
- Page 159 and 160:
SEASONAL VARIATION OF TEMPERATURE A
- Page 161 and 162:
REPORTS VOLUME SI, 1 JULY 1963 TO 3
- Page 163 and 164:
including the semiannual harmonic?
- Page 165 and 166:
REPORTS VOLUME XI, 1 JULY 1983 TO 3
- 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
- Page 176 and 177:
174 CALIFORNIA COOPERATIVE OCEANIC
- Page 178 and 179:
176 CALIFORNIA COOPERATIVE OCEANIC
- Page 180 and 181:
178 CALIFORNIA COOPERATIVE OCEANIC
- Page 182 and 183:
180 CALIFORNIA COOPERATIVE OCEANIC
- Page 184 and 185:
182 CALIFORNIA COOPERATIVE OCEANIC
- Page 186 and 187:
184CALIFORNIA COOPERATIVE OCEANIC F
- Page 188 and 189:
186 CALIFORNIA COOPERATIVE OCEANIC
- Page 190:
CONTENTSI. Review of Activities Pag