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008161004s2016    oncbd   ob   f000 0 eng d
040 |aCaOODSP|beng
041 |aeng|bfre
043 |an-cn---
0861 |aFs70-5/2016-066E-PDF
1001 |aSwain, D. P.
24510|aAssessment framework for fall-spawning Atlantic herring (Clupea harengus) in the southern Gulf of St. Lawrence (NAFO div. 4T) |h[electronic resource] : |bpopulation models and status in 2014 / |cDouglas P. Swain.
2461 |iTitle at head of French abstract : |aCadre d'évaluation de la composante des reproducteurs d'automne du hareng de l'Atlantique (Clupea harengus) dans le sud du golfe du Saint-Laurent (division 4T de l'OPANO) : |bmodèles de population et état en 2014
260 |aOttawa : |bFisheries and Oceans Canada, |cc2016.
300 |ax, 58 p. : |bcol. map
4901 |aCanadian Science Advisory Secretariat research document, |x1919-5044 ; |v2016/066, Gulf Region
500 |a“September 2016.”
504 |aIncludes bibliographical references (p. 11).
520 |a"The fall spawning component of Atlantic herring (Clupea harengus) in the southern Gulf of St. Lawrence has been assessed using virtual population analysis (VPA). A review of assessment inputs and models was undertaken due to poor model fit and unresolved model uncertainties. This document compares alternate model formulations (using revised data inputs described elsewhere) and presents status in 2014 based on the preferred model. The base model treated fall spawners as a single population and assumed that population dynamics parameters (e.g., natural mortality, M) and observation parameters (e.g., catchability) were stationary over time. A model incorporating process error in fully-recruited catchability to the gillnet fishery (q) provided the best fit to the data and eliminated the strong pattern in residuals. To address management requests, models treating fall spawners as three putative populations, based on three groups of spawning grounds (North, Middle and South), was examined. The greatest improvement in model fit and reduction in residual patterns occurred using a three-population model with process error in q, allowing q to vary independently among populations. This model was chosen as the preferred model for the provision of advice"--Abstract.
69207|2gccst|aFisheries resources
69207|2gccst|aSalt water fish
69207|2gccst|aFishing area
69207|2gccst|aFisheries management
7101 |aCanada. |bDepartment of Fisheries and Oceans.
7101 |aCanada. |bEcosystems and Oceans Science.
7102 |aCanadian Science Advisory Secretariat.
830#0|aResearch document (Canadian Science Advisory Secretariat)|x1919-5044 ; |v2016/066, Gulf Region|w(CaOODSP)9.507396
85640|qPDF|s6.24 MB|uhttps://publications.gc.ca/collections/collection_2016/mpo-dfo/Fs70-5-2016-066-eng.pdf