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040 |aCaOODSP|beng|erda|cCaOODSP
043 |an-cn-nf
0861 |aFs70-5/2019-052E-PDF
1001 |aMorgan, M. Joanne |eauthor.|q(Mary Joanne), |d1961-
24510|aChanges in productivity of Northern Cod (Gadus morhua) stock in NAFO Divisions 2J3KL / |cM. Joanne Morgan.
264 1|aOttawa : |bFisheries and Oceans Canada, Canadian Science Advisory Secretariat, |c2019.
264 4|c©2019
300 |a1 online resource (iv, 12 pages) : |bcharts.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aResearch document, |x1919-5044 ; |v2019/052
500 |aIssued also in French under title: Évolution de la productivité du stock de morues du Nord (Gadus morhua) dans les divisions 2J3KL de l’OPANO.
500 |aCover title.
500 |a"October 2019."
504 |aIncludes bibliographical references (page 4).
5203 |a"An extended period of low productivity could be a signal that a population may not return to productivity conditions that would allow it to grow to historic levels used to set a biomass limit reference point. Length at age, weight at age, condition, spawner per recruit, recruits per spawner, potential population growth rate and surplus production were all examined for evidence that Div. 2J3KL cod has been in an extended period of low productivity. All metrics of productivity showed variation over the time series. Short periods of low (and high) productivity are evident, particularly a low productivity period from the mid 1980s to mid 1990s, including 4 consecutive years with the lowest productivity in the time series. Since the mid 1990s there have been years of both high and low productivity. Overall, there is no evidence that Div. 2J3KL cod is experiencing a prolonged period of low productivity that would indicate that historic levels of biomass cannot be reached in the future under environmental conditions similar to the past"--Abstract.
69207|2gccst|aFisheries
7101 |aCanada. |bDepartment of Fisheries and Oceans. |bNewfoundland and Labrador Region.
7102 |aCanadian Science Advisory Secretariat.
77508|tÉvolution de la productivité du stock de morues du Nord (Gadus morhua) dans les divisions 2J3KL de l’OPANO / |w(CaOODSP)9.882067
830#0|aResearch document (Canadian Science Advisory Secretariat)|x1919-5044 ; |v2019/052.|w(CaOODSP)9.507396
85640|qPDF|s635 KB|uhttps://publications.gc.ca/collections/collection_2019/mpo-dfo/fs70-5/Fs70-5-2019-052-eng.pdf