FISHERY BULLETIN; VOL. 72. NO. 1 



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1969 



1966 



1965 



1964 



1963 



1962 



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1961 



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Figure 3. — Number of Pacific herring larvae per m'* caught 

 in Clarke-Bumpus nets at Buoy 21 during January -June 

 periods, 1960-1970. 



10 



0) g 



Q. 



E 



0) 



Figure 4. — Average surface temperature at Buoy 21 during 

 and 14-17 days prior to first catches of herring larvae vs. 

 date of first catches of herring larvae, 1960-1970. 



estuary to 10 miles off the coast. Within the 

 estuary, larvae of C. /;. pallasi, L. lepidus, and 

 CottKs anper usually ranked first, second, and 

 third respectively in the catches at all five 

 stations, from 0.5 to 8 nautical miles up the es- 

 tuary. L. lepidiis was the only common species 

 revStricted to the bay; it was most numerous in 

 the upper estuary. Larvae of C. h. pallasi were 

 abundant in the bay and rare outside the bay. 

 Some of the other species that are considered 

 to be primarily bay forms are Cottus asper, 

 found in greatest numbers in the upper estuary, 

 and Eiiopliiys bison, Leptocottns armatus and 

 Pholis ornata, found mainly in the lower 

 estuary. 



Many of the larvae found in the bay were found 

 in greater numbers offshore. Larvae of the surf 

 smelt, H. pretiosKs, were sometimes abundant 

 in the lower estuary where juvenile H. pretiosus 

 were also numerous. Osmerids were most abun- 

 dant 1 mile offshore. We assume that these 

 were mainly H. pnfiosKs, a si)ecies known to 

 spawn in the surf zone. Consequently, the surf 

 smelt larvae found in the bay may be carried 

 there by tidal exchange. Larvae of A. hexap- 

 terus, Sebastes spp., pleuronectids, gadids, and 

 cyclopterids were all found in higher numbers 

 offshore than in the bay. Parophryx vetulus was 

 only found offshore. 



Eiigraulis niordax larvae were found through- 

 out the bay and to 3 miles offshore. They were 

 not found 5 or 10 miles offshore. This larval 

 di.stribution, and the large numbers of anchovy 



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