PARRISH ET AL.: AGE DEPENDENT FECUNDITY IN NORTHERN ANCHOVY 



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Figure 2.— The monthly percentages of grouped maturity stages for female northern anchovies sampled in A, San Pedro fishery; B, 

 Sea survey (lat. 32.5°-34.5°N); C, Sea survey (29.5°-32.5°N); D, Monterey fishery. 



the Monterey area due to the lack of data from May 

 to July. Because of the different seasonal pattern 

 of the grouped maturity stages in the Monterey 

 fishery data and because there is more than one 

 stock in this region (Vrooman et al. 1981), it was 

 decided to exclude this area from further analysis. 

 The analyses that follow are based on the combined 

 San Pedro fishery and southern California-northern 

 Baja California sea survey data sets (52,352 females 

 of which 41,930 were aged). 



To obtain a first approximation of the magnitude 

 and duration of maturity stages in the central stock 

 of northern anchovy, the monthly percentages of 

 fish with each maturity stage were calculated for 

 females and for males. The seasonal patterns were 

 found to be essentially the same for males and 

 females; however, the males tended to have some- 

 what larger percentages of fish in the higher matur- 

 ity stages. Our presentation is limited to informa- 

 tion on females. 



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