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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Language: | English |
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Consejo Superior de Investigaciones Científicas
2012
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Online Access: | http://hdl.handle.net/10400.1/8935 https://doi.org/10.3989/scimar.03540.07B |
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/8935 2023-05-15T17:41:27+02:00 Feeding ecology of the deep-sea lanternshark Etmopterus pusillus (Elasmobranchii: Etmopteridae) in the northeast Atlantic Xavier, José C. Vieira, Cátia Assis, Carlos Cherel, Yves Hill, Simeon Costa, Esmeralda Borges, Teresa C. Coelho, Rui 2012 http://hdl.handle.net/10400.1/8935 https://doi.org/10.3989/scimar.03540.07B eng eng Consejo Superior de Investigaciones Científicas 0214-8358 AUT: TBO00930; RMS01092; http://hdl.handle.net/10400.1/8935 doi:10.3989/scimar.03540.07B openAccess http://creativecommons.org/licenses/by/4.0/ CC-BY Deep-sea fisheries Elasmobranch Etmopterus pusillus Feeding ecology Lanternshark article 2012 ftunivalgarve https://doi.org/10.3989/scimar.03540.07B 2022-05-30T08:47:25Z 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. info:eu-repo/semantics/publishedVersion Article in Journal/Newspaper Northeast Atlantic Universidade do Algarve: Sapienta Scientia Marina 76 2 301 310 |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
English |
topic |
Deep-sea fisheries Elasmobranch Etmopterus pusillus Feeding ecology Lanternshark |
spellingShingle |
Deep-sea fisheries Elasmobranch Etmopterus pusillus Feeding ecology Lanternshark Xavier, José C. Vieira, Cátia Assis, Carlos Cherel, Yves Hill, Simeon Costa, Esmeralda Borges, Teresa C. Coelho, Rui 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 |
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. info:eu-repo/semantics/publishedVersion |
format |
Article in Journal/Newspaper |
author |
Xavier, José C. Vieira, Cátia Assis, Carlos Cherel, Yves Hill, Simeon Costa, Esmeralda Borges, Teresa C. Coelho, Rui |
author_facet |
Xavier, José C. Vieira, Cátia Assis, Carlos Cherel, Yves Hill, Simeon Costa, Esmeralda Borges, Teresa C. Coelho, Rui |
author_sort |
Xavier, José C. |
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 |
http://hdl.handle.net/10400.1/8935 https://doi.org/10.3989/scimar.03540.07B |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
0214-8358 AUT: TBO00930; RMS01092; http://hdl.handle.net/10400.1/8935 doi:10.3989/scimar.03540.07B |
op_rights |
openAccess http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
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 |
_version_ |
1766143010579415040 |