DOI: 10.1073/pnas.1703165114
论文题名: Marine mammal population decline linked to obscured by-catch
作者: Meyer S. ; Robertson B.C. ; Chilvers B.L. ; Krkošek M.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2017
卷: 114, 期: 44 起始页码: 11781
结束页码: 11786
语种: 英语
英文关键词: By-catch
; Exclusion devices
; Fisheries management
; Megafauna
; Recovery
Scopus关键词: Article
; breeding
; endangered species
; environmental change
; fishery
; fishery management
; marine mammal
; nonhuman
; Otariidae
; Phocarctos hookeri
; population density
; prey
; priority journal
; time series analysis
; trawl fishery
; animal
; Antarctica
; environmental protection
; female
; fishery
; male
; physiology
; statistics and numerical data
; Animals
; Antarctic Regions
; Conservation of Natural Resources
; Female
; Fisheries
; Male
; Sea Lions
英文摘要: Declines of marine megafauna due to fisheries by-catch are thought to be mitigated by exclusion devices that release nontarget species. However, exclusion devices may instead conceal negative effects associated with by-catch caused by fisheries (i.e., unobserved or discarded by-catch with low postrelease survival or reproduction). We show that the decline of the endangered New Zealand (NZ) sea lion (Phocarctos hookeri) is linked to latent levels of by-catch occurring in sub-Antarctic trawl fisheries. Exclusion devices have been used since 2001 but have not slowed or reversed population decline. However, 35% of the variability in NZ sea lion pup production is explained by latent by-catch, and the population would increase without this factor. Our results indicate that exclusion devices can obscure rather than alleviate fishery impacts on marine megafauna. © 2017, National Academy of Sciences. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163778
Appears in Collections: 气候变化与战略
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作者单位: Meyer, S., Department of Zoology, University of Otago, Dunedin, 9054, New Zealand; Robertson, B.C., Department of Zoology, University of Otago, Dunedin, 9054, New Zealand; Chilvers, B.L., Wildbase, Institute of Veterinary, Animal and Biomedical Science, Massey University, Palmerston North, 4442, New Zealand; Krkošek, M., Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON M5S 3B2, Canada
Recommended Citation:
Meyer S.,Robertson B.C.,Chilvers B.L.,et al. Marine mammal population decline linked to obscured by-catch[J]. Proceedings of the National Academy of Sciences of the United States of America,2017-01-01,114(44)