FISHERY BULLETIN: VOL. 82. NO. 1 



MARKET SQUID 



x=127mm (Weight = 47.0 g) 



SD = 17 mm 



Range = 62-185 mm 



n = 76 



PACIFIC WHITING 



x= 166 mm (Weight = 42.6 g) 



SD = 60 mm 



Range = 89-261 mm 



n = 222 



BOCACCIO (Rockfish) 



x=171mm (Weight = 45.4 g) 



SD = 22 mm 



Range = 129-227 mm 



n = 155 





^7*V 



4tZ 



NORTHERN ANCHOVY 



x = 95 mm (Weight = 10.8 g) 



SD = 8 mm 



Range = 55-141 mm 



n = 94 



Fir.i re 1 .—Relative length and weight estimates of the four major prey species identified in California sea lion scats collected on San Miguel 

 Island, Calif., spring and summer, 1978-79. Methods used to calculate these estimates are shown in Table 2. 



The number of prey species occurring in individual 

 scats changed from spring to summer. For combined 

 years, the percentages of scats containing single or 

 multiple prey are shown in Figure 3. In the spring, the 

 percentage of singly occurring prey species in scats 

 was 59.7%; in the summer the percentage dropped 



to 34.6%. Scats containing more than one prey 

 increased from 17 species combinations occurring in 

 40.3% of the scats in the spring to 23 in 65.4% during 

 the summer. 



The percentages of the total estimated weight of the 

 four major prey species for spring and summer are 



70 



