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| 02687cam 2200325za 4500 |
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001 | 9.823136 |
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003 | CaOODSP |
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005 | 20221107143830 |
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007 | cr ||||||||||| |
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008 | 160823s2016 oncd ob f000 0 eng d |
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040 | |aCaOODSP|beng |
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041 | |aeng|bfre |
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043 | |an-cn--- |
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086 | 1 |aFs70-5/2016-058E-PDF |
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100 | 1 |aSurette, T. J. |
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245 | 14|aThe status of yellowtail flounder in NAFO division 4T to 2015 |h[electronic resource] / |cT. Surette and D.P. Swain. |
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260 | |aOttawa : |bFisheries and Oceans Canada, |cc2016. |
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300 | |ax, 74 p. : |btables, figs., graphs. |
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490 | 1 |aCanadian Science Advisory Secretariat research document, |x1919-5044 ; |v2016/058, Gulf Region |
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500 | |a“August 2016.” |
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504 | |aIncludes bibliographical references. |
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520 | |a"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. |
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692 | 07|2gccst|aFisheries resources |
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692 | 07|2gccst|aSalt water fish |
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692 | 07|2gccst|aFisheries management |
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700 | 1 |aSwain, D. P. |
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710 | 1 |aCanada. |bDepartment of Fisheries and Oceans. |
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710 | 2 |aCanadian Science Advisory Secretariat. |
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830 | #0|aResearch document (Canadian Science Advisory Secretariat)|x1919-5044 ; |v2016/058, Gulf Region|w(CaOODSP)9.507396 |
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856 | 40|qPDF|s2.63 MB|uhttps://publications.gc.ca/collections/collection_2016/mpo-dfo/Fs70-5-2016-058-eng.pdf |
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