Managing salmon for wildlife: Do fisheries limit salmon consumption by bears in small Alaskan streams?
Bristol Bay
bear predation
ecosystem-based management
human-wildlife competition
partial consumption
sockeye salmon
Journal
Ecological applications : a publication of the Ecological Society of America
ISSN: 1051-0761
Titre abrégé: Ecol Appl
Pays: United States
ID NLM: 9889808
Informations de publication
Date de publication:
04 2020
04 2020
Historique:
received:
17
08
2019
revised:
28
10
2019
accepted:
13
11
2019
pubmed:
22
12
2019
medline:
11
11
2020
entrez:
22
12
2019
Statut:
ppublish
Résumé
Ecosystem-based management requires consideration of overlapping resource use between humans and other consumers. Pacific salmon are an important resource for both fisheries and populations of wildlife around the Pacific rim, including coastal brown bears (Ursus arctos); salmon consumption has been positively linked to bear density, body size, and reproductive rate. As a case study within the broader context of human-wildlife competition for food, we used 16-22 yr of empirical data in four different salmon-bearing systems in southwestern Alaska to explore the relationship between sockeye salmon (Oncorhynchus nerka) availability and consumption by bears. We found a negative relationship between the annual biomass of salmon available to bears and the fraction of biomass consumed per fish, and a saturating relationship between salmon availability and the total annual biomass of salmon consumed by bears. Under modeled scenarios, bear consumption of salmon was predicted to increase only with dramatic (on the order of 50-100%) increases in prey availability. Even such large increases in salmon abundance were estimated to produce relatively modest increases in per capita salmon consumption by bears (2.4-4.8 kg·bear
Banques de données
figshare
['10.6084/m9.figshare.10315925.v1']
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
e02061Informations de copyright
© 2019 by the Ecological Society of America.
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