Xing L. auteur aut IRD Tang J. Y. auteur aut IRD Tian S. Q. auteur aut IRD Barrier Nicolas auteur aut IRD text journalArticle eng text/pdf born digital access There is increasing attention to the use of Antarctic toothfish (Dissostichus mawsoni) and Patagonian toothfish (Dissostichus eleginoides). Understanding the responses of toothfish and other species to fishing activities favors the sustainable use of natural resources. We developed an end-to-end model OSMOSE-CooperationSea to simulate the food web dynamics in the Cooperation Sea and evaluate the impact of toothfish fishery. Fishes and cephalopods played important roles in the energy pathways from krill species and other zooplankton species to toothfish and Weddell seal (Leptonychotes weddellii) whose trophic levels were higher than 5.0. Ade ' lie penguin (Pygoscelis ade ' liae), Crabeater seal (Lobodon carcinophaga), and Baleen whales were strongly krill-reliant. The spawning stock of toothfish decreased more quickly than the recruitments with increasing fishing pressure. Fishing impacts on the recruitments of toothfish were hysteretic due to the fishing selectivity. The model considered an ontogenetic diet shift of toothfish that mesopelagic fish was influential to toothfish juveniles. The overexploitation of toothfish stock might result in a trophic cascade that mesopelagic fish biomass increased and krill biomass declined. Ade ' lie penguin, Crabeater seal, and Baleen whales preyed on more small fishes in response to the decline of krill biomass. Considering the impacts of changes in Antarctic krill availability, the biomass of Ade ' lie penguin, Crabeater seal, and Baleen whales declined with a heavy toothfish fishery. The study highlights the importance of precautionary and ecosystem-based management to toothfish fishery. specialized Toothfish fishery Ecosystem impacts Cooperation Sea OSMOSE-Cooperation Sea model OCEAN AUSTRAL 040 036 68 103227 [18 p.] 2023 2352-4855 https://www.documentation.ird.fr/hor/fdi:010088684 10.1016/j.rsma.2023.103227 2352-4855 [F B010088684] https://www.documentation.ird.fr/hor/fdi:010088684 https://www.documentation.ird.fr/intranet/publi/2024-01/010088684.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2024-01-12 2025-02-24 fdi:010088684 fre