气候变化领域集成服务门户(CCPortal): Harvesting forage fish can prevent fishing-induced population collapses of large piscivorous fish

CCPortal

DOI	10.1073/pnas.1917079118
	Harvesting forage fish can prevent fishing-induced population collapses of large piscivorous fish
	Soudijn F.H.; Daniël van Denderen P.; Heino M.; Dieckmann U.; de Roos A.M.
发表日期	2021
ISSN	00278424
卷号	118 期号:6
英文摘要	Fisheries have reduced the abundances of large piscivores-such as gadids (cod, pollock, etc.) and tunas-in ecosystems around the world. Fisheries also target smaller species-such as herring, capelin, and sprat-that are important parts of the piscivores' diets. It has been suggested that harvesting of these so-called forage fish will harm piscivores. Multispecies models used for fisheries assessments typically ignore important facets of fish community dynamics, such as individual-level bioenergetics and/or size structure. We test the effects of fishing for both forage fish and piscivores using a dynamic, multitrophic, size-structured, bioenergetics model of the Baltic Sea. In addition, we analyze historical patterns in piscivore-biomass declines and fishing mortalities of piscivores and forage fish using global fish-stock assessment data. Our community-dynamics model shows that piscivores benefit from harvesting of their forage fish when piscivore fishing mortality is high. With substantial harvesting of forage fish, the piscivores can withstand higher fishing mortality. On the other hand, when piscivore fishing mortality is low, piscivore biomass decreases with more fishing of the forage fish. In accordance with these predictions, our statistical analysis of global fisheries data shows a positive interaction between the fishing mortalities of forage-fish stocks and piscivore stocks on the strength of piscivore-biomass declines. While overfishing of forage fish must be prevented, our study shows that reducing fishing pressures on forage fish may have unwanted negative side effects on piscivores. In some cases, decreasing forage-fish exploitation could cause declines, or even collapses, of piscivore stocks. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Bioenergetics; Fisheries; Multiple trophic levels; Predator-prey dynamics; Size-structured model
语种	英语
scopus关键词	article; Baltic Sea; bioenergy; biomass; community dynamics; fish stock; fishery; forage; mortality; nonhuman; overfishing; piscivore; predator; prediction; trophic level
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/180694
作者单位	Ecological Dynamics Group, Wageningen Marine Research, CP IJmuiden, 1976, Netherlands; Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, 1098 XH, Netherlands; Evolution and Ecology Program, International Institute for Applied Systems Analysis, Laxenburg, A-2361, Austria; Centre for Ocean Life, Technical University of Denmark Aqua, Technical University of Denmark, Kongens Lyngby, 2800, Denmark; Department of Biological Sciences, University of Bergen, Bergen, 5006, Norway; Institute of Marine Research, Bergen, 5005, Norway; Department of Evolutionary Studies of Biosystems, Graduate University for Advanced Studies (Sokendai), Hayama, Kanagawa, 240-0193, Japan; Santa Fe Institute, Santa Fe, NM 87501, United States
推荐引用方式 GB/T 7714	Soudijn F.H.,Daniël van Denderen P.,Heino M.,et al. Harvesting forage fish can prevent fishing-induced population collapses of large piscivorous fish[J],2021,118(6).
APA	Soudijn F.H.,Daniël van Denderen P.,Heino M.,Dieckmann U.,&de Roos A.M..(2021).Harvesting forage fish can prevent fishing-induced population collapses of large piscivorous fish.Proceedings of the National Academy of Sciences of the United States of America,118(6).
MLA	Soudijn F.H.,et al."Harvesting forage fish can prevent fishing-induced population collapses of large piscivorous fish".Proceedings of the National Academy of Sciences of the United States of America 118.6(2021).