Jaenicke and Celewycz: Marine distribution and size of juvenile Pacific salmon 



83 



By distance offshore in outside waters Dis- 

 tribution of juvenile salmon varied by distance off- 

 shore. Substantial numbers offish were captured up 

 to the maximum distance fished offshore (74 km, 

 Fig. 4A). At intervals offshore, abundance and pres- 

 ence of each species is shown by the 3RSSH 

 smoothed (Tukey, 1977) natural logarithms (In) of 

 CPUE (Fig. 4B) and smoothed FO (Fig. 4C) respec- 

 tively. Highest In CPUE of pink and chum salmon 

 was near the center of the distance fished offshore 

 (Fig. 4B). The transformed CPUE of sockeye salmon, 

 the least abundant species nearshore (Fig. 4B), was 

 greatest 37-74 km offshore, indicating they may 

 have been abundant beyond 74 km. The In CPUE 

 of coho salmon suggests it was the least abundant 

 species beyond 56 km (Fig. 4B). 



Table 2 

 Morisita's Index of Aggregation (J 8 ) and the asso- 

 ciated F-value for seine catches of juvenile pink, 

 chum, sockeye, and coho salmon taken in indi- 

 vidual habitats (inside waters, outer coast inlets, 

 outside waters I and all these habitats pooled in 

 Southeast Alaska in August 1983, July and Au- 

 gust 1984. Dashes indicate no fish captured. 



Sockeye 3 Inside waters 



Outer coast inlets 



Coho-' 



11.8 



22.7* 



F-value is significant for P < 0.001. 

 7 Oncorhynchus gorbuscha. 



2 0. keta 



3 O. nerka. 



4 O. kisutch. 



