气候变化领域集成服务门户(CCPortal): Recovery of assessed global fish stocks remains uncertain

CCPortal

DOI	10.1073/pnas.2108532118
	Recovery of assessed global fish stocks remains uncertain
	Britten G.L.; Duarte C.M.; Worm B.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:31
英文摘要	Concerns over overexploitation have fueled an ongoing debate on the current state and future prospects of global capture fisheries, associated threats to marine biodiversity, and declining yields available for human consumption. Management reforms have aimed to reduce fishing pressure and recover depleted stocks to biomass and exploitation rates that allow for maximum sustainable yield. Recent analyses suggest that scientifically assessed stocks, contributing over half of global marine fish catch, have, on average, reached or even exceeded these targets, suggesting a fundamental shift in the effectiveness of fisheries governance. However, such conclusions are based on calculations requiring specific choices to average over high interstock variability to derive a global trend. Here we evaluate the robustness of these conclusions by examining the distribution of recovery rates across individual stocks and by applying a diversity of plausible averaging techniques. We show that different methods produce markedly divergent trajectories of global fisheries status, with 4 of 10 methods suggesting that recovery has not yet been achieved, with up to 48% of individual stocks remaining below biomass targets and 40% exploited above sustainable rates. Furthermore, recent rates of recovery are only marginally different from zero, with up to 46% of individual stocks trending downward in biomass and 29% of stocks trending upward in exploitation rate. These results caution against overoptimistic assessments of fisheries writ large and support a precautionary management approach to ensure full rebuilding of depleted fisheries worldwide. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Fisheries rebuilding; Global fisheries; Marine resources; Overfishing
语种	英语
scopus关键词	article; averaging; biomass; calculation; fish stock; fishery; human; overfishing; remission
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/238671
作者单位	Program in Atmospheres Oceans and Climate, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Red Sea Research Centre, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia; Computational Bioscience Research Center, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia; Department of Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada
推荐引用方式 GB/T 7714	Britten G.L.,Duarte C.M.,Worm B.. Recovery of assessed global fish stocks remains uncertain[J],2021,118(31).
APA	Britten G.L.,Duarte C.M.,&Worm B..(2021).Recovery of assessed global fish stocks remains uncertain.Proceedings of the National Academy of Sciences of the United States of America,118(31).
MLA	Britten G.L.,et al."Recovery of assessed global fish stocks remains uncertain".Proceedings of the National Academy of Sciences of the United States of America 118.31(2021).