Feeding habits of the velvet belly lanternshark Etmopterus spinax (Chondrichthyes: Etmopteridae) off the Algarve, southern Portugal
Etmopterus spinax is one of the most abundant predators of the upper continental slope off the Algarve (southern Portugal), where it is captured in large quantities in deep-water fisheries. The feeding habits of E. spinax off the Algarve were investigated through the analysis of stomach contents of...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
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Language: | English |
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Cambridge University Press (CUP)
2006
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Online Access: | http://dx.doi.org/10.1017/s0025315406013762 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315406013762 |
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crcambridgeupr:10.1017/s0025315406013762 2024-05-19T07:43:50+00:00 Feeding habits of the velvet belly lanternshark Etmopterus spinax (Chondrichthyes: Etmopteridae) off the Algarve, southern Portugal Neiva, João Coelho, Rui Erzini, Karim 2006 http://dx.doi.org/10.1017/s0025315406013762 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315406013762 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 86, issue 4, page 835-841 ISSN 0025-3154 1469-7769 journal-article 2006 crcambridgeupr https://doi.org/10.1017/s0025315406013762 2024-05-02T06:51:12Z Etmopterus spinax is one of the most abundant predators of the upper continental slope off the Algarve (southern Portugal), where it is captured in large quantities in deep-water fisheries. The feeding habits of E. spinax off the Algarve were investigated through the analysis of stomach contents of 376 individuals. Prey composition was described and maturity, sex and size related variations in the diet analysed. The overall diet of E. spinax suggested a fairly generalized benthopelagic foraging behaviour primarily tuned to pelagic macroplankton/microneckton, teleost fish and cephalopods. Sex and maturity related differences in the diet were not significant. Two main ontogenic diet shifts were observed at about 17 and 28 cm total length. Small and medium sized immature sharks had a diet dominated by eurybathic crustaceans, chiefly Meganyctiphanes norvegica and Pasiphaea sivado . Larger individuals consumed more teleosts and cephalopods, in part associated with scavenging as a new feeding strategy. With increasing shark size the diet diversified both in terms of resources exploited and prey size. Article in Journal/Newspaper Meganyctiphanes norvegica Cambridge University Press Journal of the Marine Biological Association of the United Kingdom 86 4 835 841 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Etmopterus spinax is one of the most abundant predators of the upper continental slope off the Algarve (southern Portugal), where it is captured in large quantities in deep-water fisheries. The feeding habits of E. spinax off the Algarve were investigated through the analysis of stomach contents of 376 individuals. Prey composition was described and maturity, sex and size related variations in the diet analysed. The overall diet of E. spinax suggested a fairly generalized benthopelagic foraging behaviour primarily tuned to pelagic macroplankton/microneckton, teleost fish and cephalopods. Sex and maturity related differences in the diet were not significant. Two main ontogenic diet shifts were observed at about 17 and 28 cm total length. Small and medium sized immature sharks had a diet dominated by eurybathic crustaceans, chiefly Meganyctiphanes norvegica and Pasiphaea sivado . Larger individuals consumed more teleosts and cephalopods, in part associated with scavenging as a new feeding strategy. With increasing shark size the diet diversified both in terms of resources exploited and prey size. |
format |
Article in Journal/Newspaper |
author |
Neiva, João Coelho, Rui Erzini, Karim |
spellingShingle |
Neiva, João Coelho, Rui Erzini, Karim Feeding habits of the velvet belly lanternshark Etmopterus spinax (Chondrichthyes: Etmopteridae) off the Algarve, southern Portugal |
author_facet |
Neiva, João Coelho, Rui Erzini, Karim |
author_sort |
Neiva, João |
title |
Feeding habits of the velvet belly lanternshark Etmopterus spinax (Chondrichthyes: Etmopteridae) off the Algarve, southern Portugal |
title_short |
Feeding habits of the velvet belly lanternshark Etmopterus spinax (Chondrichthyes: Etmopteridae) off the Algarve, southern Portugal |
title_full |
Feeding habits of the velvet belly lanternshark Etmopterus spinax (Chondrichthyes: Etmopteridae) off the Algarve, southern Portugal |
title_fullStr |
Feeding habits of the velvet belly lanternshark Etmopterus spinax (Chondrichthyes: Etmopteridae) off the Algarve, southern Portugal |
title_full_unstemmed |
Feeding habits of the velvet belly lanternshark Etmopterus spinax (Chondrichthyes: Etmopteridae) off the Algarve, southern Portugal |
title_sort |
feeding habits of the velvet belly lanternshark etmopterus spinax (chondrichthyes: etmopteridae) off the algarve, southern portugal |
publisher |
Cambridge University Press (CUP) |
publishDate |
2006 |
url |
http://dx.doi.org/10.1017/s0025315406013762 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315406013762 |
genre |
Meganyctiphanes norvegica |
genre_facet |
Meganyctiphanes norvegica |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 86, issue 4, page 835-841 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315406013762 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
86 |
container_issue |
4 |
container_start_page |
835 |
op_container_end_page |
841 |
_version_ |
1799483585537769472 |