00000nam 2200000zi 4500 9.871678 CaOODSP 20221107163443 m o d f cr ||||||||||| 190426s2019 bcca o f000 0 eng d 9780660305332 CaOODSP eng rda CaOODSP eng fre n-cn--- Fs97-6/3306E-PDF Anderson, Erika D., author. Comparison of juvenile salmon catch in Cantrawl 250 and LFS 7742 mid-water trawl nets / E.D. Anderson, T.B. Zubkowski, and J.R. King. Nanaimo, British Columbia : Fisheries and Oceans Canada, Science Branch, Pacific Region, Pacific Biological Station, 2019. ©2019 1 online resource (v, 87 pages) : illustrations (some colour). text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian technical report of fisheries and aquatic sciences, 1488-5379 ; 3306 Includes bibliographical references (page 6). "In October 2018, a mid-water trawl gear comparison study was completed in the Strait of Georgia on the FV Sea Crest using Cantrawl 250 and LFS 7742 nets. Captured juvenile salmon abundance, biomass and size were used as metrics to test for differences in net catchability and selectivity. After 16 net adjustments tows, the following net protocols were recommended: an adjustable setback of 17 links plus hammer lock at the surface, and 36 links at depth; two floats attached to the headrope at the surface on the wingtips, and no floats at depth; and two chain clumps, one attached to each of lower wingtips on all tows. In 32 additional tows, abundance, biomass, and fork length of juvenile salmon showed no significant differences when standardized by swept volume"--Abstract, page iv. Includes abstract in French. gccst Salt water fish Zubkowski, T. B., author. King, J. R. (Jacquelynne R.), 1968- author. Canada. Department of Fisheries and Oceans. Pacific Biological Station (1972- ) Canadian technical report of fisheries and aquatic sciences, 1488-5379 ; 3306. (CaOODSP)9.504449 PDF 3.46 MB https://publications.gc.ca/collections/collection_2019/mpo-dfo/Fs97-6-3306-eng.pdf