دورية أكاديمية
The combined effects of predation, fishing, and ocean productivity on salmon species targeted by marine mammals in the northeast Pacific.
| العنوان: | The combined effects of predation, fishing, and ocean productivity on salmon species targeted by marine mammals in the northeast Pacific. |
|---|---|
| المؤلفون: | Couture F; Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, British Columbia, Canada.; Marine Mammals Research Program, Ocean Wise Research Institute, Vancouver, British Columbia, Canada., Christensen V; Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, British Columbia, Canada., Walters C; Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, British Columbia, Canada. |
| المصدر: | PloS one [PLoS One] 2024 Mar 14; Vol. 19 (3), pp. e0296358. Date of Electronic Publication: 2024 Mar 14 (Print Publication: 2024). |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Public Library of Science Country of Publication: United States NLM ID: 101285081 Publication Model: eCollection Cited Medium: Internet ISSN: 1932-6203 (Electronic) Linking ISSN: 19326203 NLM ISO Abbreviation: PLoS One Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: San Francisco, CA : Public Library of Science |
| مواضيع طبية MeSH: | Whale, Killer* , Oncorhynchus kisutch* , Caniformia*, Animals ; Salmon ; Ecosystem ; Predatory Behavior ; Hunting ; Oceans and Seas ; Pacific Ocean |
| مستخلص: | Along the northeast Pacific coast, the salmon-eating southern resident killer whale population (SRKW, Orcinus orca) have been at very low levels since the 1970s. Previous research have suggested that reduction in food availability, especially of Chinook salmon (Oncorhynchus tshawytscha), could be the main limiting factor for the SRKW population. Using the ecosystem modelling platform Ecopath with Ecosim (EwE), this study evaluated if the decline of the Pacific salmon populations between 1979 and 2020 may have been impacted by a combination of factors, including marine mammal predation, fishing activities, and climatic patterns. We found that the total mortality of most Chinook salmon populations has been relatively stable for all mature returning fish despite strong reduction in fishing mortality since the 1990s. This mortality pattern was mainly driven by pinnipeds, with increases in predation between 1979 and 2020 mortality ranging by factors of 1.8 to 8.5 across the different Chinook salmon population groups. The predation mortality on fall-run Chinook salmon smolts originating from the Salish Sea increased 4.6 times from 1979 to 2020, whereas the predation mortality on coho salmon (Oncorhynchus kisutch) smolts increased by a factor of 7.3. The model also revealed that the north Pacific gyre oscillation (NPGO) was the most important large-scale climatic index affecting the stock productivity of Chinook salmon populations from California to northern British Columbia. Overall, the model provided evidence that multiple factors may have affected Chinook salmon populations between 1979 and 2020, and suggested that predation mortality by marine mammals could be an important driver of salmon population declines during that time. Competing Interests: The authors have declared that no competing interests exist. (Copyright: © 2024 Couture et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.) |
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| تواريخ الأحداث: | Date Created: 20240314 Date Completed: 20240318 Latest Revision: 20240318 |
| رمز التحديث: | 20240318 |
| مُعرف محوري في PubMed: | PMC10939214 |
| DOI: | 10.1371/journal.pone.0296358 |
| PMID: | 38483870 |
| قاعدة البيانات: | MEDLINE |
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