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0861 |aFs70-5/2026-050E-PDF
1001 |aTurcotte, F., |eauthor.
24510|aState-space models for NAFO Division 4TVn fall spawning Atlantic herring (Clupea harengus) subpopulations / |cFrançois Turcotte.
264 1|aOttawa ON : |bCanadian Science Advisory Secretariat (CSAS), |cAugust 2026.
264 4|c©2026
300 |a1 online resource (iv, 98 pages) : |billustrations (chiefly colour).
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aResearch document, |x1919-5044 ; |v2026/050
500 |aIssued also in French under title: Modèles état-espace pour les sous-populations de hareng atlantique (Clupea harengus) frayant à l'automne dans la division 4TVn de l'OPANO.
504 |aIncludes bibliographical references (pages 20-22).
5203 |a"The last stock assessment of the Northwest Atlantic Fisheries Organization (NAFO) Division 4TVn fall spawning Atlantic Herring raised significant concerns that triggered a review of the assessment framework. This assessment framework review evaluates a state-space modeling approach to better capture time-varying productivity and selectivity and improving robustness over prior models. Key advancements include transitioning from statistical catch-at-age models to a state-space framework, developing separate models for each subpopulation (North, Middle, South) rather than a single aggregated model and disaggregating catch by fixed and mobile gear fleets with independently estimated selectivity. These structural changes enhance biological realism, reduce parameter confounding, and improve diagnostic performance. For each subpopulation, objectives included developing base and sensitivity models and identifying best-fitting models. Overall, the state-space models performed well and are recommended for future stock assessments and management"--Abstract, page iv.
650 0|aAtlantic herring populations|zSaint Lawrence, Gulf of|xMathematical models.
650 0|aFish stock assessment|zSaint Lawrence, Gulf of|xMathematical models.
650 0|aState-space methods.
7102 |aCanadian Science Advisory Secretariat, |eissuing body.
7101 |aCanada. |bDepartment of Fisheries and Oceans. |bGulf Region, |eissuing body.
77508|tModèles état-espace pour les sous-populations de hareng atlantique (Clupea harengus) frayant à l'automne dans la division 4TVn de l'OPANO / |w(CaOODSP)9.964105
830#0|aResearch document (Canadian Science Advisory Secretariat)|x1919-5044 ; |v2026/050.|w(CaOODSP)9.507396
85640|qPDF|s3.70 MB|uhttps://publications.gc.ca/collections/collection_2026/mpo-dfo/fs70-5/Fs70-5-2026-050-eng.pdf