气候变化领域集成服务门户(CCPortal): Variable trends in the distribution of Atlantic cod (Gadus morhua) in the Celtic seas

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DOI	10.1111/jfb.15715
	Variable trends in the distribution of Atlantic cod (Gadus morhua) in the Celtic seas
	Ellis, Jonathan V.; Schuchert, Pia; Scantlebury, D. Michael; Marshall, C. Tara; Fernandes, Paul G.
发表日期	2024
ISSN	0022-1112
EISSN	1095-8649
英文摘要	Despite decades of active fisheries management, many stocks of Atlantic cod in its southern range are in a depleted state and mortality estimates remain high. Recovery of these stocks, as defined by management areas, could be confounded by cod distributions shifting outside of these areas. Here, we assess data from internationally coordinated trawl surveys to investigate the distribution of three cod stocks in the Celtic Seas ecoregion, Irish Sea, Celtic Sea, and West of Scotland, from 1985 to 2021. We mapped cod densities, analyzed trends in mean weighted depth and bottom temperature, and calculated the center of gravity and equivalent area of the stocks. The distribution of the West of Scotland stock shifted north and east, spilling into the North Sea, while the Irish Sea and Celtic Sea stocks shifted west. Each stock showed decreasing trends in equivalent area, but there were no clear trends in the average depth occupied by the fish. There was no apparent relationship between temperature and the distribution of cod, as bottom temperature varied little from 1993 to 2021. Although Irish Sea cod showed a shift into warmer water, this was due to changes in survey distribution. The shift in distribution of the West of Scotland cod stock towards the North Sea whilst impairing local recovery provides further justification for the recent definition of its incorporation into a larger stock unit that includes the northwest of the North Sea. The Irish Sea and Celtic Sea cod stocks are neither shifting northwards, nor into deeper waters, but remained within current boundaries. This suggests that recent temperature conditions did not affect their distribution, but this may change as temperatures increase towards the limit for reproduction.
英文关键词	Atlantic cod; Celtic seas; distribution shifts; stock decline
语种	英语
WOS研究方向	Fisheries ; Marine & Freshwater Biology
WOS类目	Fisheries ; Marine & Freshwater Biology
WOS记录号	WOS:001182521500001
来源期刊	JOURNAL OF FISH BIOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302107
作者单位	University of Aberdeen; Agri-Food & Biosciences Institute; Queens University Belfast; Heriot Watt University
推荐引用方式 GB/T 7714	Ellis, Jonathan V.,Schuchert, Pia,Scantlebury, D. Michael,et al. Variable trends in the distribution of Atlantic cod (Gadus morhua) in the Celtic seas[J],2024.
APA	Ellis, Jonathan V.,Schuchert, Pia,Scantlebury, D. Michael,Marshall, C. Tara,&Fernandes, Paul G..(2024).Variable trends in the distribution of Atlantic cod (Gadus morhua) in the Celtic seas.JOURNAL OF FISH BIOLOGY.
MLA	Ellis, Jonathan V.,et al."Variable trends in the distribution of Atlantic cod (Gadus morhua) in the Celtic seas".JOURNAL OF FISH BIOLOGY (2024).