Fishery catch is affected by geographic expansion, fishing down food webs and climate change in Aotearoa, New Zealand

doi:10.7717/peerj.16070

	Fishery catch is affected by geographic expansion, fishing down food webs and climate change in Aotearoa, New Zealand
	Lavin, Charles Patrick 1; Pauly, Daniel 2; Dimarchopoulou, Donna 3,4; Liang, Cui 5; Costello, Mark John 1
	2023-09-21
发表期刊	PEERJ
ISSN	2167-8359
卷号	11 页码:27
通讯作者	Lavin, Charles Patrick(charles.p.lavin@nord.no)
摘要	Historical fishing effort has resulted, in many parts of the ocean, in increasing catches of smaller, lower trophic level species once larger higher trophic level species have been depleted. Concurrently, changes in the geographic distribution of marine species have been observed as species track their thermal affinity in line with ocean warming. However, geographic shifts in fisheries, including to deeper waters, may conceal the phenomenon of fishing down the food web and effects of climate warming on fish stocks. Fisheries-catch weighted metrics such as the Mean Trophic Level (MTL) and Mean Temperature of the Catch (MTC) are used to investigate these phenomena, although apparent trends of these metrics can be masked by the aforementioned geographic expansion and deepening of fisheries catch across large areas and time periods. We investigated instances of both fishing down trophic levels and climate-driven changes in the geographic distribution of fished species in New Zealand waters from 1950-2019, using the MTL and MTC. Thereafter, we corrected for the masking effect of the geographic expansion of fisheries within these indices by using the Fishing-in-Balance (FiB) index and the adapted Mean Trophic Level (aMTL) index. Our results document the offshore expansion of fisheries across the New Zealand Exclusive Economic Zone (EEZ) from 1950-2019, as well as the pervasiveness of fishing down within nearshore fishing stock assemblages. We also revealed the warming of the MTC for pelagic-associated fisheries, trends that were otherwise masked by the depth-and geographic expansion of New Zealand fisheries across the study period.
关键词	New Zealand Fisheries Ocean warming Mean trophic level Mean temperature of the catch Fishing down marine food webs Fishing-in-Balance index
DOI	10.7717/peerj.16070
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:001080095000005
出版者	PEERJ INC
WOS关键词	TOP-DOWN ; MARINE ; OCEAN ; SIZE
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/181668
专题	海洋生态与环境科学重点实验室
通讯作者	Lavin, Charles Patrick
作者单位	1.Nord Univ, Fac Biosci & Aquaculture, Bodo, Norway 2.Univ British Columbia, Inst Ocean & Fisheries, Sea Around Us, Vancouver, BC, Canada 3.Dalhousie Univ, Biol Dept, Halifax, NS, Canada 4.Woods Hole Oceanog Inst, Biol Dept, Woods Hole, MA USA 5.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Lavin, Charles Patrick,Pauly, Daniel,Dimarchopoulou, Donna,et al. Fishery catch is affected by geographic expansion, fishing down food webs and climate change in Aotearoa, New Zealand[J]. PEERJ,2023,11:27.
APA	Lavin, Charles Patrick,Pauly, Daniel,Dimarchopoulou, Donna,Liang, Cui,&Costello, Mark John.(2023).Fishery catch is affected by geographic expansion, fishing down food webs and climate change in Aotearoa, New Zealand.PEERJ,11,27.
MLA	Lavin, Charles Patrick,et al."Fishery catch is affected by geographic expansion, fishing down food webs and climate change in Aotearoa, New Zealand".PEERJ 11(2023):27.