00000cam 2200000zi 4500 9.964104 CaOODSP 20260909090844 m o d f cr mn||||||||| 260710e202608##onca ob f000 0 eng d 9780662440659 CaOODSP eng rda CaOODSP n-cn-qu n-cnm-- ln----- x7y2 Fs70-5/2026-050E-PDF Turcotte, F., author. State-space models for NAFO Division 4TVn fall spawning Atlantic herring (Clupea harengus) subpopulations / François Turcotte. Ottawa ON : Canadian Science Advisory Secretariat (CSAS), August 2026. ©2026 1 online resource (iv, 98 pages) : illustrations (chiefly colour). text txt rdacontent computer c rdamedia online resource cr rdacarrier Research document, 1919-5044 ; 2026/050 Issued 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. Includes bibliographical references (pages 20-22). "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. Atlantic herring populations Saint Lawrence, Gulf of Mathematical models. Fish stock assessment Saint Lawrence, Gulf of Mathematical models. State-space methods. Canadian Science Advisory Secretariat, issuing body. Canada. Department of Fisheries and Oceans. Gulf Region, issuing body. Modèles état-espace pour les sous-populations de hareng atlantique (Clupea harengus) frayant à l'automne dans la division 4TVn de l'OPANO / (CaOODSP)9.964105 Research document (Canadian Science Advisory Secretariat) 1919-5044 ; 2026/050. (CaOODSP)9.507396 PDF 3.70 MB https://publications.gc.ca/collections/collection_2026/mpo-dfo/fs70-5/Fs70-5-2026-050-eng.pdf