Feeding ecology of the deep-sea lanternshark Etmopterus pusillus (Elasmobranchii: Etmopteridae) in the northeast Atlantic
This study provides the first description of the feeding ecology of the smooth lanternshark Etmopterus pusillus based on stomach contents of specimens caught as bycatch in the Algarve (southern Portugal) with bottom trawling and bottom longline. The diet of E. pusillus consists mainly of fish (dry w...
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Consejo Superior de Investigaciones Científicas
2012
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Online Access: | https://doi.org/10.3989/scimar.03540.07B https://doaj.org/article/b2fd8f91c2f2497bafee7dedc3530037 |
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ftdoajarticles:oai:doaj.org/article:b2fd8f91c2f2497bafee7dedc3530037 2023-05-15T17:41:27+02:00 Feeding ecology of the deep-sea lanternshark Etmopterus pusillus (Elasmobranchii: Etmopteridae) in the northeast Atlantic José C. Xavier Cátia Vieira Carlos Assis Yves Cherel Simeon Hill Esmeralda Costa Teresa C. Borges Rui Coelho 2012-06-01T00:00:00Z https://doi.org/10.3989/scimar.03540.07B https://doaj.org/article/b2fd8f91c2f2497bafee7dedc3530037 EN eng Consejo Superior de Investigaciones Científicas http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1343 https://doaj.org/toc/0214-8358 https://doaj.org/toc/1886-8134 0214-8358 1886-8134 doi:10.3989/scimar.03540.07B https://doaj.org/article/b2fd8f91c2f2497bafee7dedc3530037 Scientia Marina, Vol 76, Iss 2, Pp 301-310 (2012) deep-sea fisheries elasmobranch etmopterus pusillus feeding ecology lanternshark Aquaculture. Fisheries. Angling SH1-691 article 2012 ftdoajarticles https://doi.org/10.3989/scimar.03540.07B 2022-12-31T10:54:48Z This study provides the first description of the feeding ecology of the smooth lanternshark Etmopterus pusillus based on stomach contents of specimens caught as bycatch in the Algarve (southern Portugal) with bottom trawling and bottom longline. The diet of E. pusillus consists mainly of fish (dry weight (% W)=87.1%; frequency of occurrence (%FO)=28.6%; number (%N)=30.3%), crustaceans (%W=7.7%; %FO=36.7%; %N=3.4%) and cephalopods (%W=4.7%; %FO=11.3%; %N=11.1%). The diet did not vary between sexes. Ontogenic changes were detected: crustaceans decreased in importance as the sharks increased in size and fish became dominant in the diet of adults. Combining two fishing methods provided broad information on the diet of E. pusillus, as bottom trawling caught smaller specimens and longlines caught larger individuals. E. pusillus feeds mainly on non-commercial species, and therefore does not compete directly with commercial fisheries. Finally, E. pusillus feeds in various parts of the water column and thus it can access a wide range of prey; however, this also means that it can be caught by both gears, making it more vulnerable in terms of conservation. Article in Journal/Newspaper Northeast Atlantic Directory of Open Access Journals: DOAJ Articles Scientia Marina 76 2 301 310 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
deep-sea fisheries elasmobranch etmopterus pusillus feeding ecology lanternshark Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
deep-sea fisheries elasmobranch etmopterus pusillus feeding ecology lanternshark Aquaculture. Fisheries. Angling SH1-691 José C. Xavier Cátia Vieira Carlos Assis Yves Cherel Simeon Hill Esmeralda Costa Teresa C. Borges Rui Coelho Feeding ecology of the deep-sea lanternshark Etmopterus pusillus (Elasmobranchii: Etmopteridae) in the northeast Atlantic |
topic_facet |
deep-sea fisheries elasmobranch etmopterus pusillus feeding ecology lanternshark Aquaculture. Fisheries. Angling SH1-691 |
description |
This study provides the first description of the feeding ecology of the smooth lanternshark Etmopterus pusillus based on stomach contents of specimens caught as bycatch in the Algarve (southern Portugal) with bottom trawling and bottom longline. The diet of E. pusillus consists mainly of fish (dry weight (% W)=87.1%; frequency of occurrence (%FO)=28.6%; number (%N)=30.3%), crustaceans (%W=7.7%; %FO=36.7%; %N=3.4%) and cephalopods (%W=4.7%; %FO=11.3%; %N=11.1%). The diet did not vary between sexes. Ontogenic changes were detected: crustaceans decreased in importance as the sharks increased in size and fish became dominant in the diet of adults. Combining two fishing methods provided broad information on the diet of E. pusillus, as bottom trawling caught smaller specimens and longlines caught larger individuals. E. pusillus feeds mainly on non-commercial species, and therefore does not compete directly with commercial fisheries. Finally, E. pusillus feeds in various parts of the water column and thus it can access a wide range of prey; however, this also means that it can be caught by both gears, making it more vulnerable in terms of conservation. |
format |
Article in Journal/Newspaper |
author |
José C. Xavier Cátia Vieira Carlos Assis Yves Cherel Simeon Hill Esmeralda Costa Teresa C. Borges Rui Coelho |
author_facet |
José C. Xavier Cátia Vieira Carlos Assis Yves Cherel Simeon Hill Esmeralda Costa Teresa C. Borges Rui Coelho |
author_sort |
José C. Xavier |
title |
Feeding ecology of the deep-sea lanternshark Etmopterus pusillus (Elasmobranchii: Etmopteridae) in the northeast Atlantic |
title_short |
Feeding ecology of the deep-sea lanternshark Etmopterus pusillus (Elasmobranchii: Etmopteridae) in the northeast Atlantic |
title_full |
Feeding ecology of the deep-sea lanternshark Etmopterus pusillus (Elasmobranchii: Etmopteridae) in the northeast Atlantic |
title_fullStr |
Feeding ecology of the deep-sea lanternshark Etmopterus pusillus (Elasmobranchii: Etmopteridae) in the northeast Atlantic |
title_full_unstemmed |
Feeding ecology of the deep-sea lanternshark Etmopterus pusillus (Elasmobranchii: Etmopteridae) in the northeast Atlantic |
title_sort |
feeding ecology of the deep-sea lanternshark etmopterus pusillus (elasmobranchii: etmopteridae) in the northeast atlantic |
publisher |
Consejo Superior de Investigaciones Científicas |
publishDate |
2012 |
url |
https://doi.org/10.3989/scimar.03540.07B https://doaj.org/article/b2fd8f91c2f2497bafee7dedc3530037 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Scientia Marina, Vol 76, Iss 2, Pp 301-310 (2012) |
op_relation |
http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1343 https://doaj.org/toc/0214-8358 https://doaj.org/toc/1886-8134 0214-8358 1886-8134 doi:10.3989/scimar.03540.07B https://doaj.org/article/b2fd8f91c2f2497bafee7dedc3530037 |
op_doi |
https://doi.org/10.3989/scimar.03540.07B |
container_title |
Scientia Marina |
container_volume |
76 |
container_issue |
2 |
container_start_page |
301 |
op_container_end_page |
310 |
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1766143020666716160 |