PACIFIC SARDINE (PILCHARD) EGGS AND LARVAE AND OTHER FISH LARVAE, 

 PACIFIC COAST, 1952 



The results of quantitative sampling of eggs and larvae of the Pacific 

 sardine or pilchard ( Sardinops caerule a) off the west coast of California and 

 3a ja California during 1952 are given in this report, the third in a continu- 

 ing yearly series. Also included, are records of the larvae of 5 other 

 species: northern anchovy ( Engraulis mordax) , jack mackerel ( Trachurus sym - 

 aetricus) , hake (Merluccius productus ) , Pacific mackerel ( Pneumatophorus diego), 

 md rockfish ( Sebastode s spp.). 



The material was collected on biological-oceanographical cruises being 

 itade by agencies participating in the California Cooperative Oceanic Fisheries 

 (Investigations (formerly called the California Cooperative Sardine Research 

 3 rogram). The investigations are sponsored by the Marine Research Committee, 

 md are carried out cooperatively by the South Pacific Fishery Investigations 

 >f the United States Fish and Wildlife Service, the Scripps Institution of 

 oceanography of the University of California, the Bureau of Marine Fisheries 

 )f the California Department of Fish and Game, and the Hopkins Marine Station 

 )f Stanford University, 



The data are presented in 8 tables. Standardized haul factors for plank- 

 ion hauls made on survey cruises during 1952 are listed in table I. Additional 

 iata concerning these hauls may be found in "Zooplankton volumes off the Paci- 

 ric coast, 1952", Special Scientific Report: Fisheries, No. 100; these include 

 sosition of occupancy, date, hour, depth of haul, and volume of water strained, 



A record of all collections containing Pacific sardine eggs in 1952 is 

 jiven in table II. The eggs are enumerated by age (in days) since spawning, 

 ind for each haul the average number of eggs spawned per day has been determined. 



The larvae of 3 species are enumerated by size: Pacific sardine in table 

 [II, anchovy in table IV, jack mackerel in table V. The larvae of the remain- 

 ing species are tabulated by number only: hake in table VI, Pacific mackerel 

 i.n table VII, and rockfish in table VIII, 



It is a pleasure to acknowledge the wholehearted cooperation given by the 

 participating agencies. All personnel of the South Pacific Fishery Investi- 

 gations contributed to this project, many devoting their full time to it. 

 )avid Kramer, Robert Counts and James Thrailkill aided in the identifications, 

 enumerations , and measurements included in this report. 



