Comparison of approaches for incorporating depredation on fisheries catches into Ecopath
| Autor: | Sophie Gourguet, Bertrand Le Gallic, Martin P. Marzloff, Pierre-Yves Hernvann, Catherine M. Bulman, Johanna Faure, Paul Tixier, Verena M. Trenkel, Clara Péron, Lyndsay Clavareau, Nicolas Gasco |
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| Přispěvatelé: | Ifremer, BP 70, 29280 Plouzané, France, Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), IFREMER EMH Nantes [France], CSIRO Agriculture and Food (CSIRO), Aménagement des Usages des Ressources et des Espaces marins et littoraux - Centre de droit et d'économie de la mer (AMURE), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Deakin University, Burwood, Australia, Deakin University [Burwood] |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Ecology 010604 marine biology & hydrobiology Fishing Aquatic Science Oceanography Fish stock 010603 evolutionary biology 01 natural sciences Predation Fishery Geography Ecosystem model Marine ecosystem 14. Life underwater Fisheries management [SDE.BE]Environmental Sciences/Biodiversity and Ecology Population dynamics of fisheries Ecology Evolution Behavior and Systematics Trophic level |
| Zdroj: | ICES Journal of Marine Science ICES Journal of Marine Science, Oxford University Press (OUP), 2020, 77 (7-8), pp.3153-3167. ⟨10.1093/icesjms/fsaa219⟩ |
| ISSN: | 1095-9289 1054-3139 |
| DOI: | 10.1093/icesjms/fsaa219 |
| Popis: | Ecosystem-based approaches are increasingly used in fisheries management to account for the direct trophic impacts of fish population harvesting. However, fisheries can also indirectly alter ecosystem structure and functioning, for instance via the provision of new feeding opportunities to marine predators. For instance, marine depredation, where predators feed on fishery catches on fishing gear, is a behaviour developed by many marine species globally. This behaviour can modify both the ecological role of predators and fisheries performance. Yet, these ecosystem-wide effects of depredation are rarely considered holistically. In this study, we explored different ways of incorporating depredation into an Ecopath trophic model. We assessed, through a subantarctic case study, how three alternative model structures can account for depredation effects on fishery catches, predator and non-commercial prey populations, as well as target fish stocks. While none adequately addresses all facets of depredation, the alternative models can to some extent capture how depredation can lead to increased fishing pressure on stocks. As structural specificities of Ecopath prevented us from representing other depredation effects such as provisioning effects for predator populations, we conclude this study with a set of guidance to effectively capture the complex effects of depredation in marine ecosystems and fisheries models. |
| Databáze: | OpenAIRE |
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