2011 Standardized stock assessment survey

Eleven commercial longline vessels, seven Canadian and four U.S., were chartered by the International PaciÞ c Halibut Commission for survey operations in 2011. During a combined 73 trips and 694 charter days, these vessels Þ shed 28 charter regions and two bait experiments, covering habitat from southern Oregon, to the island of Attu in the Aleutian Islands, and north along the Bering Sea continental shelf edge. Of the 1,315 stations planned for the 2011 survey, 1,314 (99.9%) were completed, and 1,299 (98.7%) survey stations were effective for stock assessment analysis. Approximately 664,821 pounds of halibut, 160,899 pounds of PaciÞ c cod, and 49,034 pounds of rockÞ sh were landed from the standardized survey stations and bait experiments combined. Compared to the 2010 survey, WPUE increased in Regulatory Areas 2A, 2C, and 3A. WPUE decreased in areas 2B, 3B, 4A, 4C, and 4D. WPUE in Area 4B was unchanged.