2022 article

Chinook salmon diversity contributes to fishery stability and trade‐offs with mixed‐stock harvest

Brendan M. Connors, Matthew R. Siegle, Joel M. S. Harding, Steven P. Rossi, Benjamin A. Staton, Michael L. Jones, Michael J. Bradford, Randy J. Brown, Bill Bechtol, Beau Doherty, Sean Cox, Ben J. G. Sutherland

21Citations signalées, ce qui n’est pas une note de qualité

7Institutions déclarées

2Pays d’affiliation déclarés

Rattachement africain : ca, us. Niveau de preuve : code pays fourni par la source.

Le résumé fourni par la source

Variation among populations in life history and intrinsic population characteristics (i.e., population diversity) helps maintain resilience to environmental change and dampen interannual variability in ecosystem services. As a result, ecological variation, and the processes that generate it, is considered central to strategies for managing risks to ecosystems in an increasingly variable and uncertain world. However, characterizing population diversity is difficult, particularly in large and remote regions, which often prevents its formal consideration in management advice. We combined genetic stock identification of archived scale and tissue samples with state-space run-reconstruction models to estimate migration timing and annual return abundance for eight geographically and genetically distinct Chinook salmon populations within the Canadian portion of the Yukon River. We found that among-population variation in migration timing and return abundances resulted in aggregate return migrations that were 2.1 times longer and 1.4 times more stable than if they had composed a single homogeneous population. We then fit state-space spawner-recruitment models to the annual return abundances to characterize among-population diversity in intrinsic productivity and population size and their consequences for the fisheries they support. Productivity and carrying capacity varied among populations by approximately 2.4-fold (2.9 to 6.9 recruits per spawner) and three-fold (8800 to 27,000 spawners), respectively. This diversity implies an equilibrium trade-off between harvesting of the population aggregate and the conservation of individual populations whereby the harvest rate predicted to maximize aggregate harvests comes at the cost of overfishing ~40% of the populations but with a relatively low risk of extirpating the weakest ones. Our findings illustrate how population diversity in one of the largest salmon-producing river basins in the world contributes to fishery stability and food security in a region where salmon have high cultural and subsistence value. More generally, our work demonstrates the utility of molecular analyses of archived biological material for characterizing diversity in biological systems and its benefits and consequences for trade-offs in decision-making.

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Le contrôle bibliographique ouvert

DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.

Titre Crossref: Chinook salmon diversity contributes to fishery stability and trade‐offs with mixed‐stock harvest
Date Crossref: 21/09/2022
Éditeur: Wiley
Type: journal-article

Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.

Où se fait cette recherche

Fisheries and Oceans Canada pays non établi dans la notice
Organisme public
Simon Fraser University pays non établi dans la notice
Université ou école supérieure
Columbia River Inter-Tribal Fish Commission pays non établi dans la notice
Organisme public
Michigan State University Quantitative Fisheries Center pays non établi dans la notice
Université ou école supérieure
Alaska Department of Fish and Game pays non établi dans la notice
Organisme public
United States Fish and Wildlife Service pays non établi dans la notice
Organisme public
Bechtel (United States) pays non établi dans la notice
Entreprise
Institute of Ocean Sciences pays non établi dans la notice
Structure de recherche
Pacific Biological Station pays non établi dans la notice
Institution
Landmark Fisheries Research Port Moody British Columbia Canada pays non établi dans la notice
Institution
Columbia River Inter‐Tribal Fish Commission Portland Oregon USA pays non établi dans la notice
Institution
US Fish and Wildlife Service Fairbanks Alaska USA pays non établi dans la notice
Institution

Fisheries and Oceans Canada, Simon Fraser University et Columbia River Inter-Tribal Fish Commission, avec 9 autres affiliations.

Une affiliation ne permet pas de déduire la nationalité d’un auteur.

Les sujets associés

Fish Ecology and Management StudiesAquatic Invertebrate Ecology and BehaviorEnvironmental DNA in Biodiversity Studies

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