Feeding ecology of the deep-sea lanternshark Etmopterus pusillus (Elasmobranchii: Etmopteridae) in the northeast Atlantic
International audience 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 consist...
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Online Access: | https://hal.science/hal-00710158 https://doi.org/10.3989/scimar.03540.07B |
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ftunivnantes:oai:HAL:hal-00710158v1 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, Catia Assis, Carlos Cherel, Yves Hill, Simeon Costa, Esmeralda Borges, Teresa C. Coelho, Rui Institut Marine Research University of Coimbra Portugal (UC) Centre of Marine Sciences Faro (CCMAR) University of Algarve Portugal Department of Animal Biology and Institute of Oceanography (University of Lisbon) Universidade de Lisboa = University of Lisbon (ULISBOA) Centre d'Études Biologiques de Chizé (CEBC) Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) 2012 https://hal.science/hal-00710158 https://doi.org/10.3989/scimar.03540.07B en eng HAL CCSD Consejo Superior de Investigaciones Científicas info:eu-repo/semantics/altIdentifier/doi/10.3989/scimar.03540.07B hal-00710158 https://hal.science/hal-00710158 doi:10.3989/scimar.03540.07B ISSN: 0214-8358 Scientia Marina https://hal.science/hal-00710158 Scientia Marina, 2012, 76 (2), pp.301-310. ⟨10.3989/scimar.03540.07B⟩ deep-sea fisheries elasmobranch Etmopterus pusillus feeding ecology lanternshark [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2012 ftunivnantes https://doi.org/10.3989/scimar.03540.07B 2023-02-08T00:27:18Z International audience 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 Université de Nantes: HAL-UNIV-NANTES Scientia Marina 76 2 301 310 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
deep-sea fisheries elasmobranch Etmopterus pusillus feeding ecology lanternshark [SDE]Environmental Sciences |
spellingShingle |
deep-sea fisheries elasmobranch Etmopterus pusillus feeding ecology lanternshark [SDE]Environmental Sciences Xavier, José C. Vieira, Catia 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 [SDE]Environmental Sciences |
description |
International audience 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. |
author2 |
Institut Marine Research University of Coimbra Portugal (UC) Centre of Marine Sciences Faro (CCMAR) University of Algarve Portugal Department of Animal Biology and Institute of Oceanography (University of Lisbon) Universidade de Lisboa = University of Lisbon (ULISBOA) Centre d'Études Biologiques de Chizé (CEBC) Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) |
format |
Article in Journal/Newspaper |
author |
Xavier, José C. Vieira, Catia Assis, Carlos Cherel, Yves Hill, Simeon Costa, Esmeralda Borges, Teresa C. Coelho, Rui |
author_facet |
Xavier, José C. Vieira, Catia 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 |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.science/hal-00710158 https://doi.org/10.3989/scimar.03540.07B |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
ISSN: 0214-8358 Scientia Marina https://hal.science/hal-00710158 Scientia Marina, 2012, 76 (2), pp.301-310. ⟨10.3989/scimar.03540.07B⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3989/scimar.03540.07B hal-00710158 https://hal.science/hal-00710158 doi:10.3989/scimar.03540.07B |
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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1766143004134866944 |