The changing times of Europe's largest remaining commercially harvested population of eel Anguilla anguilla L

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dc.contributor.authorAprahamian, Miran W.
dc.contributor.authorEvans, Derek W.
dc.contributor.authorBriand, Cedric
dc.contributor.authorWalker, Alan M.
dc.contributor.authorMcElarney, Yvonne
dc.contributor.authorAllen, Michelle M.
dc.date.accessioned2021-08-04T14:13:42Z
dc.date.available2021-08-04T14:13:42Z
dc.date.issued2021-06-04
dc.descriptionPublication history: Accepted - 1 June 2021; Published online - 4 June 2021.en_US
dc.description.abstractThis study quantifies the processes involved in regulating the European eel population of Lough Neagh, a lake in Northern Ireland. The relationship between glass eel input and silver eel output for the 1923–1997 cohorts was best described by a Beverton–Holt stock recruitment model. Glass eel input time series was not complete and was thus derived from the relationship between catches elsewhere in Europe and Lough Neagh, together with the addition of stocked glass eel. Silver eel output was the sum of silver eel escapement, catch and yellow eel catch converted to silver eel equivalents. Natural mortality increased with glass eel density, ranging from 0.017 to 0.142 year−1. The mean carrying capacity increased from ≈3.25 M silver eels (≈26 kg ha−1) for the 1923–1943 cohorts to ≈5.0 M (≈40 kg ha−1) for the 1948–1971 cohorts before regressing back to ≈3.25 M. The total silver eel output was highest during the late 1970s/early 1980s at 35–45 kg ha−1 year−1 and lowest during the early years of the 20th century and is currently at 10–15 kg ha−1 year−1. The findings are discussed in relation to (a) the ecological changes that have occurred within the lough, associated with eutrophication and the introduction of roach (Rutilus rutilus L.), and (b) the decline of the wider European eel stock across its distribution range. The findings from this study have relevance for the wider management of the European eel stock.en_US
dc.description.sponsorshipDepartment of Agriculture Environment and Rural Affairs (Northern Ireland) and the Department for Environment, Food and Rural Affairs (UK) for funding this study.en_US
dc.identifierhttp://hdl.handle.net/20.500.12518/332
dc.identifier.citationAprahamian, M. W., Evans, D. W., Briand, C., Walker, A. M., McElarney, Y. and Allen, M. (2021) ‘The changing times of Europe’s largest remaining commercially harvested population of eel Anguilla anguilla L.’, Journal of Fish Biology. doi: 10.1111/jfb.14820.en_US
dc.identifier.issn0022-1112
dc.identifier.issn1095-8649
dc.identifier.urihttps://doi.org/10.1111/jfb.14820
dc.language.isoenen_US
dc.publisherWileyen_US
dc.rightsThis is an ope n access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in anymedium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.© 2021 Crown copyright. Journal of Fish Biology published by John Wiley & Sons Ltd on behalf of Fisheries Society of the British Isles. This article is published withthe permission of the Controller of HMSO and the Queen's Printer for Scotlanden_US
dc.subjectEuropean eelen_US
dc.subjectexploitationen_US
dc.subjectnatural mortalityen_US
dc.subjectpopulation dynamicsen_US
dc.subjectregime shiften_US
dc.subjectstock recruitmenten_US
dc.titleThe changing times of Europe's largest remaining commercially harvested population of eel Anguilla anguilla Len_US
dc.typeArticleen_US
dcterms.dateAccepted2021-06-01
dcterms.dateSubmitted2021-02-03

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