U.S. West Coast Bottom Trawl Survey of Groundfish Resources (2005) Off Washington, Oregon, and California: Estimates of Distribution, Abundance, and Length Composition; Technical memo

摘要

The Northwest Fisheries Science Centerfs Fishery Resource Analysis and Monitoring Division (FRAM) completed the eighth in an annual series of groundfish bottom trawl surveys in 2005. The survey was conducted from 23 May to 25 October 2005 and targeted the commercial groundfish resources inhabiting depths of 55 to 1,280 m (30.700 fathoms) from the area off Cape Flattery, Washington (lat 4810N), to the U.S.-Mexico border (lat 3230N) using chartered West Coast commercial trawl vessels. This ongoing series of annual surveys, conducted by FRAM since 1998, are designed to monitor long-term trends in the distribution and abundance of West Coast groundfish, especially those species of management concern. The 2005 survey represents the third year in which the depth range was expanded to include both the continental shelf (55.183 m) and continental slope (183.1,280 m) and the third year in which a stratified random sampling design was adopted.