496 



Fishery Bulletin 94(3). 1996 



Average net migration rates decreased with in- 

 creasing age for all stock groups of ocean- and stream- 

 type chinook salmon. This decreased migration rate 

 for older fish may be a consequence of residency in 

 the sampling area or of interception offish during a 

 circuitous return migration. Highest migration rates 

 were for age 1.0 fish from Washington and Oregon 

 (6.9 km/d). Fisher and Pearcy (1995) reported that 

 age 1.0 chinook salmon (75 km up the Columbia 

 River) migrated at an average net rate of 4.1 km/d to 

 ocean capture locations off Washington and Oregon. 

 Our higher average net migration rates for age 1.0 

 chinook salmon from Washington and Oregon may 

 have been a function of our capture locality, which 

 would favor recoveries offish from these stocks that 

 had migrated northward most rapidly. 



This study identifies the marine waters of south- 

 eastern Alaska as an important nursery area for an 

 amalgam of prerecruit chinook salmon stocks origi- 

 nating from Oregon to Alaska. Stream-type stocks 

 from southeastern Alaska and northern British Co- 

 lumbia typically use inside waters during their first 

 year at sea; at the same time stream-type stocks of 

 Washington and Oregon use both inside and outside 

 waters. Ocean-type stocks from British Columbia, 

 Washington, and Oregon first appear in marine wa- 

 ters of southeastern Alaska after their first winter 

 at sea and use waters throughout the region during 

 their second and third years at sea. Although our 

 study on prerecruit chinook salmon has contributed to 

 our understanding of the temporal and spatial occur- 

 rence of this species in southeastern Alaska, additional 

 studies of prerecruits in this region are needed to fur- 

 ther identify migration routes, distribution patterns, 

 and residency time of specific stock groups. 



Acknowledgments 



We thank the following vessel operators for their 

 excellent service and cooperation during this study: 

 L. and M. Haughton (FV China Cove), S. and J. 

 Hursey and J. Dobbins (FV Kiska), R. Dorris and C. 

 Busenius ( FV Lea II), J. and C. Goddard ( FV Lila C), 

 and R. and J. Earl (FV Northern Diver). In addition, 

 we thank D. Mortensen for his assistance on a troll 

 charter and E. Beedle for reading scales. Our special 

 thanks are extended to the anonymous journal re- 

 viewer who provided extremely useful critiques of 

 the manuscript. 



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