Section: Ecology
Topic:
Ecology,
Biology of interactions
Effects of adaptive harvesting on fishing down processes and resilience changes in predator-prey and tritrophic systems
Corresponding author(s): Tromeur, Eric (eric.tromeur@gmail.com)
10.24072/pcjournal.268 - Peer Community Journal, Volume 3 (2023), article no. e52.
Get full text PDF Peer reviewed and recommended by PCIMany world fisheries display a declining mean trophic level of catches. This “fishing down the food web” is often attributed to reduced densities of high-trophic-level species. We show here that the fishing down pattern can actually emerge from the adaptive harvesting of two- and three-species food webs, where changes in fishing patterns are driven by the relative profitabilities of the harvested species. Shifting fishing patterns from a focus on higher trophic levels to a focus on lower trophic levels can yield abrupt changes in the system, strongly impacting species densities. In predator-prey systems, such regime shifts occur when the predator species is highly valuable relative to the prey, and when the top-down control on the prey is strong. Moreover, we find that when the two species are jointly harvested, high adaptation speeds can reduce the resilience of fisheries. Our results therefore suggest that flexibility in harvesting strategies will not necessarily benefit fisheries but may actually harm their sustainability.
Type: Research article
Tromeur, Eric 1, 2; Loeuille, Nicolas 1
@article{10_24072_pcjournal_268, author = {Tromeur, Eric and Loeuille, Nicolas}, title = {Effects of adaptive harvesting on fishing down processes and resilience changes in predator-prey and tritrophic systems}, journal = {Peer Community Journal}, eid = {e52}, publisher = {Peer Community In}, volume = {3}, year = {2023}, doi = {10.24072/pcjournal.268}, language = {en}, url = {https://peercommunityjournal.org/articles/10.24072/pcjournal.268/} }
TY - JOUR AU - Tromeur, Eric AU - Loeuille, Nicolas TI - Effects of adaptive harvesting on fishing down processes and resilience changes in predator-prey and tritrophic systems JO - Peer Community Journal PY - 2023 VL - 3 PB - Peer Community In UR - https://peercommunityjournal.org/articles/10.24072/pcjournal.268/ DO - 10.24072/pcjournal.268 LA - en ID - 10_24072_pcjournal_268 ER -
%0 Journal Article %A Tromeur, Eric %A Loeuille, Nicolas %T Effects of adaptive harvesting on fishing down processes and resilience changes in predator-prey and tritrophic systems %J Peer Community Journal %D 2023 %V 3 %I Peer Community In %U https://peercommunityjournal.org/articles/10.24072/pcjournal.268/ %R 10.24072/pcjournal.268 %G en %F 10_24072_pcjournal_268
Tromeur, Eric; Loeuille, Nicolas. Effects of adaptive harvesting on fishing down processes and resilience changes in predator-prey and tritrophic systems. Peer Community Journal, Volume 3 (2023), article no. e52. doi : 10.24072/pcjournal.268. https://peercommunityjournal.org/articles/10.24072/pcjournal.268/
PCI peer reviews and recommendation, and links to data, scripts, code and supplementary information: 10.24072/pci.ecology.100417
Conflict of interest of the recommender and peer reviewers:
The recommender in charge of the evaluation of the article and the reviewers declared that they have no conflict of interest (as defined in the code of conduct of PCI) with the authors or with the content of the article.
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