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NOAA Technical Memorandum NMFS-AFSC-216

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The 2010 Eastern Bering Sea continental shelf bottom trawl survey: Results for commercial crab species

Abstract

The eastern Bering Sea bottom trawl survey has been conducted annually since 1975 by the National Marine Fisheries Service’s Alaska Fisheries Science Center’s Resource Assessment and Conservation Engineering Division. The purpose of this survey is to collect data on the distribution and abundance of crab and groundfish resources in the eastern Bering Sea. These data are used to estimate population abundances for the management of commercially important species in the region. In 2010, 376 standard stations were sampled along with four extra tows at a hot spot station and 23 stations were resampled in Bristol Bay at the end of the standard survey to adequately account for female red king crab maturity. The 2010 biomass estimates reported in metric tons (t) and pounds (lbs) with 95% confidence intervals (CI = 1.96 SE) for legal-sized males of commercial crab stocks in the EBS were as follows:   

  2010 legal-sized male biomass
Metric tons Pounds
Bristol Bay District red king crab (Paralithodes camtschaticus) 21,347 (7,504) 47,062 (16,544)
Pribilof District red king crab (P. camtschaticus) 2,881 (2,049) 6,351 (4,517)
Pribilof District blue king crab (P. platypus) 202 (191) 445(421)
St. Matthew Island Section blue king crab (P. platypus) 4,317 (2,165) 9,517 (4,773)
Southern Tanner crab, all Districts (Chionoecetes bairdi) 7,955 (3,172) 17,536 (6,993)
Snow crab, all Districts (C. opilio) 136,140 (31,567) 300,134 (69,593)
Snow crab, all Districts > 4.0 inches 88,788 (24,996) 195,472 (55,106)



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