ABUNDANCE OF SARDINE LxARVAE, 

 1951-64 



Relative abundance of sardine larvae in the 

 CalCOFI survey area, 1951-64, based on av- 

 erage quarterly estimates of abundance is 

 given in table 9. Sardine larvae were nnost 

 abundant in 1954, decreased to about a fourth 

 of this abundance by 1959-60, and have re- 

 mained at a low level of abundance since then. 



In recent years (1961-64) most sardine larvae 

 have been collected off central Baja California 

 (station lines 110-137). 



We know from genetic studies utilizing 

 blood antigens that the sardines off central 

 Baja California are distinct from the stock off 

 southern California. The latter has markedly 

 decreased in abundance even relative to the 

 "southern" stock of sardines off central Baja 

 California. 



Table 9. 



-Relative abundance of sardine larvae in CalCOFI survey area, 1951-64, based on average quarterly estimates 



of abundance 



Year 



January 

 March 



April 

 June 



2,351 



4,304 



2,667 



5,042 



1,848 



1,160 



812 



381 



329 



180 



96 



154 



54 



28 



TABLES CONTAINING INFORMATION 

 ABOUT SARDINE AND ANCHOVY LARVAE 



In the tables that follow, information on 

 sardine larvae is presented before that for 

 anchovy larvae. The sequence of tables is as 

 follows: 



Tables 10-18, Size composition of sardine 

 larvae, summarized by monthly cruise for 

 individual years, 1951-59. 



Tables 19-23, Numbers of sardine larvae, 

 tabulated by station, for 1958, 1959, 1960, 

 1961-62, and 1963-64. 



Tables 24-37, Occurrence and abundance of 

 sardine larvae summarized by cruise and 

 area for individual years, 1951-64, 



Tables 38-46, Size composition of anchovy 

 larvae, summarized by monthly cruise for 

 individual years, 1951-59. 



Tables 47-51, Numbers of anchovy larvae, 

 tabulated by station, for 1958, 1959, 1960, 

 1961-62, and 1963-64. 



Tables 52-65, Occurrence and abundance 

 of anchovy larvae summarized by cruise and 

 area for individual years, 1951-64. 



Table 66, Numbers of stations occupied on 

 CalCOFI surveys, summarized by cruise and 

 area, 1951-64. 



It should be noted that small differences in 

 cruise and yearly totals in some tables result 

 from rounding off of values that originally 

 were reported to the first decimal place. 



15 



