FISHERY BULLETIN: VOL. 72. NO. 3 



Table 5. — Mean lengths (mm NLi of silver hake larvae collected during Do/p/j in cruise 

 D-66-10 (August 1966), arranged by transect, net 1 (0-15 m) or net 2 ( 18-33 ml, and station. 



Table 6. — Mean lengths (mm NL) of silver hake larvae collected during Dolphin cruise 

 D-66-11 (September, 1966), arranged by transect, net 1 (0-15 m) or net 2 (18-33 m), and 

 station. 



eluded in the table to demonstrate the possibility 

 that the temperature relationship is simply an 

 artifact created by our cruise schedule. The 

 probability of collecting these temperature-tol- 

 erant larvae at any temperature increases as 

 sampling at that temperature increases. 



Our maximum sampling depth was below the 

 thermocline on all stations where we captured 

 larval silver hake. Larvae apparently were more 

 concentrated near the thermocline than near the 

 surface during the summer months. Table 9 

 compares the percentage of the total catch con- 



tributed by the deep net (which sampled near the 

 thermocline) during each cruise with observed 

 surface temperatures and indicates that during 

 August and September, when surface tempera- 

 tures were highest, silver hake larvae were dis- 

 tributed more deeply where temperatures were 

 lower. 



Our cruise schedule and sampling sequence 

 resulted in many consecutive stations being 

 sampled during the same light regime. Thus, 

 opportunities for comparing the diel differences 

 in the captures of silver hake larvae are limited. 



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