Spatiotemporal Variations in Trace Element Compositions in Pollock Populations under the Influence of Coastal Norwegian Salmon Farms
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Title: | Spatiotemporal Variations in Trace Element Compositions in Pollock Populations under the Influence of Coastal Norwegian Salmon Farms |
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Authors: | Fourdain, Linda | Arechavala-Lopez, Pablo | Uglem, Ingebrigt | Sæther, Bjørn-Steinar | Sanchez-Jerez, Pablo |
Research Group/s: | Biología Marina |
Center, Department or Service: | Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada |
Keywords: | Pollock Pollachius virens | Salmon farms | Trace element | Spatiotemporal variations | Norway |
Knowledge Area: | Zoología |
Issue Date: | 20-Feb-2022 |
Publisher: | Wiley Periodicals |
Citation: | Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science. 2022, 14(1): e10193. https://doi.org/10.1002/mcf2.10193 |
Abstract: | Pollock Pollachius virens (also known as Saithe) modify their feeding habits when including in their diet uneaten feed pellets from salmon aquaculture sea cages. To determine the influence of salmon farms on Pollock, multivariate and univariate analyses were conducted on the trace element signatures from muscle and liver tissues. Sample fish were caught in the vicinity of salmon farms and in control areas (>3-km distance from the farms) on the coast of Hitra Island (western Norway) over two consecutive years (2012 and 2013). The hepatosomatic index was calculated as a proxy of fish body condition and was higher in Pollock captured near the salmon farms in both years. Variations in specific trace element profiles revealed the influence of farming on the Pollock assemblages (i.e., arsenic, manganese, and copper in muscle; vanadium and manganese in liver). Differences in element composition between sampling years were notable and may, in addition to influence from salmon feed, reflect temporal variation in Pollock migrations or natural food availability. Multivariate analyses of each sampling year showed significant differences in trace element composition of both tissue types among the Pollock groups. Therefore, trace element assessment is a potential tool for determining the influence of aquaculture on Pollock populations, although other natural sources of variation must be taken into account when considering future aquaculture and fishery management strategies. |
Sponsor: | This study was part of a project entitled “Evaluation of actions to promote sustainable coexistence between salmon culture and coastal fisheries (ProCoEx),” which was funded by the Norwegian Seafood Research Fund. The study was also supported by the Norwegian Research Council through the EcoCoast project. |
URI: | http://hdl.handle.net/10045/121799 |
ISSN: | 1942-5120 |
DOI: | 10.1002/mcf2.10193 |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Rights: | © 2022 The Authors. Marine and Coastal Fisheries published by Wiley Periodicals LLC on behalf of American Fisheries Society. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
Peer Review: | si |
Publisher version: | https://doi.org/10.1002/mcf2.10193 |
Appears in Collections: | INV - BM - Artículos Científicos / Scientific Papers |
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Fourdain_etal_2022_MarCoastFish.pdf | 949,44 kB | Adobe PDF | Open Preview | |
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