Stable isotopes reveal the effect of trawl fisheries on the diet of commercially exploited species

Abstract Bottom trawling can change food availability for benthivorous demersal species by (i) changing benthic prey composition through physical seabed impacts and (ii) by removing overall benthic consumer biomass increasing the net availability of benthic prey for remaining individuals. Thus trawl...

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Autores principales:	Hilmar Hinz, Joan Moranta, Stephen Balestrini, Marija Sciberras, Julia R. Pantin, James Monnington, Alex Zalewski, Michel J. Kaiser, Mattias Sköld, Patrik Jonsson, Francois Bastardie, Jan Geert Hiddink
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d3d29ff948b1418fa0ce9d7292098f88
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spelling	oai:doaj.org-article:d3d29ff948b1418fa0ce9d7292098f882021-12-02T16:06:15ZStable isotopes reveal the effect of trawl fisheries on the diet of commercially exploited species10.1038/s41598-017-06379-62045-2322https://doaj.org/article/d3d29ff948b1418fa0ce9d7292098f882017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06379-6https://doaj.org/toc/2045-2322Abstract Bottom trawling can change food availability for benthivorous demersal species by (i) changing benthic prey composition through physical seabed impacts and (ii) by removing overall benthic consumer biomass increasing the net availability of benthic prey for remaining individuals. Thus trawling may both negatively and positively influence the quantity and quality of food available. Using δ 13C and δ 15N we investigated potential diet changes of three commercially exploited species across trawling gradients in the Kattegat (plaice, dab and Norway lobster (Nephrops)) and the Irish Sea (Nephrops). In the Kattegat, trawling affected primarily the biomass of benthic consumers, lowering competition. Nephrops showed significant positive relationships for δ 13C and a domed relationship for δ 15N with trawling. In the Irish Sea, intense trawling had a negative effect on benthic prey. δ 13C and δ 15N thus showed the inverse relationships to those observed in the Kattegat. Plaice from the Kattegat, showed a significant relationship with trawling intensity for δ 13C, but not for δ 15N. No relationship was found for dab. Changes of δ 13C and δ 15N correlated with changes in condition of species. The results show that the removal of demersal competitors and benthos by trawling can change the diets of commercial species, ultimately affecting their body condition.Hilmar HinzJoan MorantaStephen BalestriniMarija SciberrasJulia R. PantinJames MonningtonAlex ZalewskiMichel J. KaiserMattias SköldPatrik JonssonFrancois BastardieJan Geert HiddinkNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hilmar Hinz Joan Moranta Stephen Balestrini Marija Sciberras Julia R. Pantin James Monnington Alex Zalewski Michel J. Kaiser Mattias Sköld Patrik Jonsson Francois Bastardie Jan Geert Hiddink Stable isotopes reveal the effect of trawl fisheries on the diet of commercially exploited species
description	Abstract Bottom trawling can change food availability for benthivorous demersal species by (i) changing benthic prey composition through physical seabed impacts and (ii) by removing overall benthic consumer biomass increasing the net availability of benthic prey for remaining individuals. Thus trawling may both negatively and positively influence the quantity and quality of food available. Using δ 13C and δ 15N we investigated potential diet changes of three commercially exploited species across trawling gradients in the Kattegat (plaice, dab and Norway lobster (Nephrops)) and the Irish Sea (Nephrops). In the Kattegat, trawling affected primarily the biomass of benthic consumers, lowering competition. Nephrops showed significant positive relationships for δ 13C and a domed relationship for δ 15N with trawling. In the Irish Sea, intense trawling had a negative effect on benthic prey. δ 13C and δ 15N thus showed the inverse relationships to those observed in the Kattegat. Plaice from the Kattegat, showed a significant relationship with trawling intensity for δ 13C, but not for δ 15N. No relationship was found for dab. Changes of δ 13C and δ 15N correlated with changes in condition of species. The results show that the removal of demersal competitors and benthos by trawling can change the diets of commercial species, ultimately affecting their body condition.
format	article
author	Hilmar Hinz Joan Moranta Stephen Balestrini Marija Sciberras Julia R. Pantin James Monnington Alex Zalewski Michel J. Kaiser Mattias Sköld Patrik Jonsson Francois Bastardie Jan Geert Hiddink
author_facet	Hilmar Hinz Joan Moranta Stephen Balestrini Marija Sciberras Julia R. Pantin James Monnington Alex Zalewski Michel J. Kaiser Mattias Sköld Patrik Jonsson Francois Bastardie Jan Geert Hiddink
author_sort	Hilmar Hinz
title	Stable isotopes reveal the effect of trawl fisheries on the diet of commercially exploited species
title_short	Stable isotopes reveal the effect of trawl fisheries on the diet of commercially exploited species
title_full	Stable isotopes reveal the effect of trawl fisheries on the diet of commercially exploited species
title_fullStr	Stable isotopes reveal the effect of trawl fisheries on the diet of commercially exploited species
title_full_unstemmed	Stable isotopes reveal the effect of trawl fisheries on the diet of commercially exploited species
title_sort	stable isotopes reveal the effect of trawl fisheries on the diet of commercially exploited species
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/d3d29ff948b1418fa0ce9d7292098f88
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Stable isotopes reveal the effect of trawl fisheries on the diet of commercially exploited species

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