Growth and mortality of rockfishes (Scorpaenidae) from Alaska waters

Abstract

Growth and mortality were estimated for seven rockfish species of the genus Sebastes found in the Gulf of Alaska, Bering Sea, and Aleutian Islands region.  When data allowed, von Bertalanffy growth parameters were compared between various collection locations and years. Significant differences in growth were detected for most species between locations and years. Most notable was a longitudinal trend for increasing length-at-age among Pacific ocean perch (S. alutus). Mortality rates estimated from life history parameters were similar to previously published estimates. Among samples of S. alutus and northern rockfish (S. polyspinis), mortality rates in the Gulf of Alaska were greater than in the Aleutian Islands region.


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