气候变化领域集成服务门户(CCPortal): Marine mammal population decline linked to obscured by-catch

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DOI	10.1073/pnas.1703165114
	Marine mammal population decline linked to obscured by-catch
	Meyer S.; Robertson B.C.; Chilvers B.L.; Krkošek M.
发表日期	2017
ISSN	0027-8424
起始页码	11781
结束页码	11786
卷号	114 期号:44
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.
英文关键词	By-catch; Exclusion devices; Fisheries management; Megafauna; Recovery
语种	英语
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
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160579
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
推荐引用方式 GB/T 7714	Meyer S.,Robertson B.C.,Chilvers B.L.,et al. Marine mammal population decline linked to obscured by-catch[J],2017,114(44).
APA	Meyer S.,Robertson B.C.,Chilvers B.L.,&Krkošek M..(2017).Marine mammal population decline linked to obscured by-catch.Proceedings of the National Academy of Sciences of the United States of America,114(44).
MLA	Meyer S.,et al."Marine mammal population decline linked to obscured by-catch".Proceedings of the National Academy of Sciences of the United States of America 114.44(2017).