000 03238nam  2200397zi 4500
006m     o  d f      
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008191217t20192019oncdb   ob   f000 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
043 |an-cn-nf
0861 |aFs70-5/2019-066E-PDF
1001 |aWheeland, Laura, |eauthor.
24510|aAssessment of Witch Flounder (Glyptocephalus cynoglossus) NAFO Divisions 2J3KL / |cL. Wheeland, B. Rogers, R. Rideout, D. Maddock Parsons.
264 1|aOttawa : |bFisheries and Oceans Canada, Canadian Science Advisory Secretariat, |c2019.
264 4|c©2019
300 |a1 online resource (iv, 57 pages) : |bfigures.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aResearch document, |x1919-5044 ; |v2019/066
500 |aIssued also in French under title: Évaluation de la plie grise (Glyptocephalus cynoglossus) dans les divisions 2J3KL de l’OPANO.
500 |aCover title.
500 |a"November 2019."
504 |aIncludes bibliographical references (page 8).
516 |aElectronic monograph in PDF format.
5203 |a"Information available to evaluate stock status of Witch Flounder (Glyptocephalus cynoglossus) in NAFO Divisions 2J3KL consisted of commercial landings data (1960-2017) and information from Canadian fall RV trawl surveys (1977-2017). This stock has been under moratorium in Canadian waters since 1995, and in the NAFO regulatory area since 1998. Following a contraction of the stock to shelf slope areas through the 1990s, the distribution of the stock has expanded in recent years, returning to deep channels occupied in the mid-1980s. A general increase has been observed in indices of both abundance and biomass since the early 2000s, however variability in RV survey coverage has resulted in increased uncertainty in indices, particularly given recent coverage issues in the deep water of Div. 3L. A series of positive prerecruit anomalies indicate improved recruitment in this stock since 2013, with a time series high in 2016. Bivariate habitat associations indicate that distribution of this stock is largely driven by temperature, with Witch Flounder consistently seeking out waters warmer (i.e. within 3.2 to 3.6°C, across Divs. 2J, 3K and 3L) than the median available (-0.3 to 2.7°C). A Limit Reference Point was set for this stock at 40% BMSY, with a proxy for BMSY calculated as the mean of survey biomass indices from 1983-1984"--Abstract.
650 0|aGlyptocephalus cynoglossus fisheries|zNewfoundland and Labrador.
650 0|aFish stock assessment|zNewfoundland and Labrador.
7101 |aCanada. |bDepartment of Fisheries and Oceans. |bNewfoundland and Labrador Region.
7102 |aCanadian Science Advisory Secretariat.
77508|tÉvaluation de la plie grise (Glyptocephalus cynoglossus) dans les divisions 2J3KL de l’OPANO / |w(CaOODSP)9.882975
830#0|aResearch document (Canadian Science Advisory Secretariat)|v2019/066.|w(CaOODSP)9.507396
85640|qPDF|s8.44 MB|uhttps://publications.gc.ca/collections/collection_2019/mpo-dfo/fs70-5/Fs70-5-2019-066-eng.pdf