534 



Fishery Bulletin 103(3) 



tion of limited movement (Matala, 2004). Conversely, 

 Orlov (2001) proposed a synopsis of horizontal adult 

 migration (with increased size of shortraker rockfish 

 at spawning grounds) and oceanic dispersal of larvae 

 and juveniles. 



In conclusion, it appears there are species-level differ- 

 ences between the two rougheye rockfish types. We have 

 considered the darker morph Sebastes sp. cf. aleutianus 

 as the new type. The paler S. aleutianus morph con- 

 forms more to the original S. aleutianus type descrip- 

 tion, an individual of which was captured at a 55-m 

 depth in the Gulf of Alaska. It is likely that the distri- 

 bution of the new species S. sp cf aleutianus stretches 

 from the Gulf of Alaska and west to Asia. The distri- 

 bution of S. aleutianus encompasses the Gulf of Alaska 

 and extends south to California, and the species is 

 found in more shallow waters where it is sympatric with 

 S. sp cf aleutianus. An understanding of the basic life 

 history, distribution, and biomass of a species is critical 

 for successful resource management. Ito (1999) suggest- 

 ed that the major fisheries management survey effort is 

 the NMFS Gulf of Alaska triennial trawl survey, which 

 may be inadequate to assess the shortraker-rougheye 

 rockfish assemblage because its multispecies sampling 

 design covers mostly depths less than 200 m. This sur- 

 vey may, therefore, be completely missing Sebastes sp. 

 cf. aleutianus altogether. An important consideration for 

 management is knowledge of exploitation rates. Given 

 the sensitivity of long-lived rockfish species to over-ex- 

 ploitation, basic biological studies should be undertaken 

 of these species to understand characteristics such as 

 growth, maturity, and natural mortality. 



Acknowledgments 



We dedicate this article in fond memory of H. R. Carlson. 

 His research provided a highly significant contribution 

 to our understanding of juvenile rockfish life history and 

 homing in adult rockfish, and he was anxiously awaiting 

 completion of our study. We thank Hanhvan Nguyen for 

 her support in the laboratory, and we thank all partici- 

 pants in the haul and longline surveys for providing the 

 collections. We also thank James Orr, Jerry Pella, and 

 Phillip Rigby for earlier reviews of the manuscript, and 

 Adam Moles for the parasite determinations. 



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