00000cam 2200000za 4500 9.823136 CaOODSP 20260219114527 cr ||||||||||| 160823s2016 oncd ob f000 0 eng d CaOODSP eng eng fre n-cn--- Fs70-5/2016-058E-PDF Surette, T. J. The status of yellowtail flounder in NAFO division 4T to 2015 [electronic resource] / T. Surette and D.P. Swain. Ottawa : Fisheries and Oceans Canada, c2016. x, 74 p. : tables, figs., graphs. Canadian Science Advisory Secretariat research document, 1919-5044 ; 2016/058, Gulf Region “August 2016.” Includes bibliographical references. "Yellowtail flounder (Limanda ferruginea) landings in NAFO 4T peaked in 1986-1987 (400 t) and in 1997 (819 t) and declined from 305 t in 1999 to 102 t in 2015. A TAC of 300 t has been in place since 2000. Yellowtail are mainly exploited in a bait fishery located in the Magdalen Islands since 1995 and almost exclusively so since 2004. Abundance indices from a research survey have been stable since the mid-eighties. However, corresponding biomass indices have decreased due to a shift in modal size from 29 cm in the early 1970s to 22 cm in recent years. Size-at-maturity in both males and females has declined from 23-24 cm in the in the early 1970s to 12-13 cm in recent years. Annual mortality of small fish has decreased from 53% to 16-22% while that of larger fish has increased from 22% to 86% from the middle to late eighties to the present. While spawning stock biomass has increased, the proportion of older (7+ years) fish has declined from 40% in 1985-1990 to less that 0.5% since 2013. Fishing mortality is estimated to be very low and there were no perceived differences in stock projections over the next five years at catch levels of 0 t, 100 t, and 300 t annually. A limit reference point (Blim = 1.06 kg/tow) was derived from the commercial sized (≥ 25 cm) biomass index from the research vessel survey. The abundance index in 2015 was at 61% of Blim"-abstract. gccst Fisheries resources gccst Salt water fish gccst Fisheries management Swain, D. P. Canada. Department of Fisheries and Oceans. Canadian Science Advisory Secretariat. Research document (Canadian Science Advisory Secretariat) 1919-5044 ; 2016/058, Gulf Region (CaOODSP)9.507396 PDF 2.63 MB https://publications.gc.ca/collections/collection_2016/mpo-dfo/Fs70-5-2016-058-eng.pdf