|Document Type:||Technical Memorandum|
|Title:||The Northwest Fisheries Science Center's West Coast Groundfish Bottom Trawl Survey: History, Design, and Description|
|Author/Editor:||A. A. Keller, J. R. Wallace, R. D. Methot|
|Tech Memo Number:||NMFS-NWFSC-136|
Information on the abundance and distribution of most Pacific Coast groundfish is obtained principally by bottom trawl surveys. The annual bottom trawl survey in this region is conducted by the NMFS Northwest Fisheries Science Center from four chartered fishing vessels that each conduct over 150 trawls during early summer to early autumn, and cover trawlable habitats from the US-Mexico to the US-Canada borders, at depths of 55 m to 1,280 m. This document covers the history of this survey, including descriptions of predecessor surveys in the region, statistical design, and survey protocols.
Historical Overview of the West Coast Groundfish Bottom Trawl Survey
|Theme:||Recovery and rebuilding of marine and coastal species|
Characterize the population biology of species, and develop and improve methods for predicting the status of populations.
Keller, A. A., J. R. Wallace, and R. D. Methot. 2017. The Northwest Fisheries Science Center's West Coast Groundfish Bottom Trawl Survey: History, Design, and Description. U.S. Department of Commerce, NOAA Technical Memorandum NMFS-NWFSC-136.