SARDINE EGGS AND LARVAE AND OTHER FISH LARVAE 

 PACIFIC COAST, 1957 



The first report in this series, which appeared as Special Scientific Report: 

 Fisheries No. 80, contained a record of Pacific sardine or pilchard ( Sardinops 

 caerulea ) eggs and larvae for 1950, and of larvae of the northern anchovy 

 ( Engraulis mordax) , jack mackerel ( Trachurus symmetricus ), hake (Merluccius 

 productus ) and rockfish (Sebastodes spp.). Larvae of sardine and anchovy were 

 reported by size; those of the other species by total number per station. The 

 initial paper contained a more detailed account of methods of sampling and standard- 

 ization of hauls than subsequent ones. The report has gradually evolved into its 

 present format. A record of total number of larvae of Pacific mackerel ( Pneumato - 

 phorus die go) per station was added to the report dealing with 1951 collections 

 (Spec. Sci. Rept: Fisheries No. 102). Jack mackerel larvae were reported by size 

 in the report for 1952 (Spec. Sci. Rept.: Fisheries No. 123) and subsequently. 

 Pacific mackerel larvae were reported by size since 1953 (Spec. Sci. Rept.: Fisheries 

 No. 155). Beginning with the report for 1955, yearly distribution charts were included 

 for sardine eggs, and for larvae of sardine, anchovy, jack mackerel. Pacific mackerel, 

 and hake; a series of summary tables (text tables) were added, along with a partial 

 analysis of the data on distribution and abundance of each category. The present report 

 is the eighth in a continuing series. 



As in previous reports, the basic data are presented in eight tables, designated 

 by Roman numerals: 



I. Record of standardized haul factors for oblique hauls made with 



plankton nets during cruises 5701-5712, 1957. 

 n. Record of sardine eggs, reported by age in days. 

 m. Record of all hauls containing sardine larvae, reported by size groups. 



IV. Record of all hauls containing anchovy larvae, reported by size groups, 



V. Record of all hauls containing jack mackerel larvae, reported by size 

 groups. 



VI. Record of all hauls containing Pacific mackerel larvae, reported by 

 size groups. 



VII. Hake larvae, reported by number per station. 

 Vm. Rockfish larvae, reported by number per station. 



The fish eggs and larvae included in this report were obtained in quantitative 

 plankton hauls on cruises of the California Cooperative Oceanic Fisheries Investi- 

 gations, The investigations are sponsored by the California Marine Research 

 Committee and are carried out cooperatively by the Biological Laboratory, La JoUa, 

 of the U. S, Bureau of Commercial Fisheries, the Scripps Institution of Oceanography 



