Growth of red king crabs from the Central Aleutian Islands, Alaska

Growth of red king crabs from the Central Aleutian Islands, Alaska

I. Vining, S.F. Blau, and D. Pengilly

Growth of red king crabs from the Central Aleutian Islands, AlaskaThis is part of Crabs in Cold Water Regions: Biology, Management, and Economics
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Description

Growth per molt and molting probability were estimated from male red king crabs Paralithodes camtschaticus that were tagged and released during the 1970s by Alaska Department of Fish and Game (ADFG) biologists in the Adak Island to Amlia Island area within the Adak (Aleutians) Management Area, Alaska. There were 14,742 tagged crabs released, of which 1,385 were recovered by fishermen during commercial red king crab fisheries, and by subsequent pot surveys by ADFG. Measurement error and growth per molt in carapace length (CL) were estimated using mixture model analyses. Crab stagged and released in different years had different growth rates, from an average growth of approximately 8 mm CL to 16 mm CL in a single year. The molting probability also varied between years, though high molting probabilities were estimated for crabs less than 115 mm CL, and low molting probabilities were estimated for crabs greater than 155 mm CL, for all years.

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