ABSTRACT 



This report provides ichthyoplankton and associated station 

 and tow data from California Cooperative Oceanic Fisheries 

 Investigations (CalCOFI) cruises conducted off California and 

 Baja California in 1958. It is the eighth report in a series 

 that presents these data for all biological-oceanographic CalCOFI 

 surveys from 1951 to the present. A total of 1884 stations was 

 occupied during 12 monthly multivessel cruises over the quarter- 

 million square mile survey area which extends from the 

 California-Oregon border to Cape San Lucas, Mexico and seaward to 

 several hundred miles. The data are listed in a series of 6 

 tables; the background, methodology, and information necessary 

 for interpretation and quantitative analysis of the data are 

 presented in an accompanying text. All pertinent station and tow 

 data, including volumes of water strained and standard haul 

 factors are listed in the first table. Another key table lists, 

 by station and month, standardized counts of each of the 151 

 larval fish categories identified from survey samples. This and 

 previous and subsequent reports make the CalCOFI ichthyoplankton 

 and station data available to all investigators and serve as 

 guides to the newly developed computer data base. 



INTRODUCTION 



This report, the eighth of a series, provides 

 ichthyoplankton and associated station and tow data from 

 California Cooperative Oceanic Fisheries Investigations (CalCOFI) 

 joint biological-oceanographic survey cruises conducted in 1958. 

 This program was initiated in 1949, under the sponsorship of 

 the Marine Research Committee of the State of California, to 

 study the population fluctuations of the Pacific sardine 

 (Sardinops sagax) and the environmental factors that may play a 

 role in such fluctuations. CalCOFI, known as the California 

 Cooperative Sardine Research Program from 1949 to 1953, was made 

 up of representatives of the South Pacific Fisheries 

 Investigations (SPFI) of the U.S. Fish and Wildlife Service [now 

 the La Jolla Laboratory, National Marine Fisheries Service 

 (NMFS) ] , the Scripps Institution of Oceanography (SIO) , the 

 California Department of Fish and Game (CDFG) , the California 

 Academy of Sciences (CAS) and the Hopkins Marine Station of 

 Stanford University. The first three of these agencies supplied 

 ships and personnel to conduct the sea surveys. NMFS processed 

 the plankton samples and analyzed the ichthyoplankton from them. 

 SIO processed and analyzed the hydrographic samples and 

 measurements and also analyzed invertebrate groups from the 

 plankton samples. 



The boundaries, station placement, and sampling frequency 

 for the CalCOFI survey area were based on the results of joint 

 biological and oceanographic cruises conducted by NMFS and SIO 

 during 1939-41. Those cruises were designed to collect sardine 

 eggs and larvae and associated hydrographic data over the entire 

 areal and seasonal spawning range of the species. On these 



