A glimpse into the trophic ecology of deep‐water sharks in an important crustacean fishing ground
Deep-water sharks are among the most vulnerable deep-water taxa because of their extremely conservative life-history strategies (i.e., late maturation, slow growth, and reproductive rates), yet little is known about their biology and ecology. Thus, this study aimed at investigating the trophic ecolo...
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Language: | English |
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Wiley
2023
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Online Access: | http://hdl.handle.net/10400.1/19241 https://doi.org/10.1111/jfb.15306 |
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/19241 2023-05-15T17:38:35+02:00 A glimpse into the trophic ecology of deep‐water sharks in an important crustacean fishing ground Graça Aranha, Sofia Teodosio, MA Baptista, Vânia Erzini, Karim Dias, Ester 2023 http://hdl.handle.net/10400.1/19241 https://doi.org/10.1111/jfb.15306 eng eng Wiley info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04326%2F2020/PT info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04326%2F2020/PT info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04423%2F2020/PT info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04423%2F2020/PT info:eu-repo/grantAgreement/FCT/OE/SFRH%2FBD%2F147493%2F2019/PT 0022-1112 http://hdl.handle.net/10400.1/19241 doi:10.1111/jfb.15306 openAccess http://creativecommons.org/licenses/by/4.0/ Bottom-trawl Diet Ecophysiology North-east Atlantic RNA DNA Stable isotopes article 2023 ftunivalgarve https://doi.org/10.1111/jfb.15306 2023-03-15T01:07:38Z Deep-water sharks are among the most vulnerable deep-water taxa because of their extremely conservative life-history strategies (i.e., late maturation, slow growth, and reproductive rates), yet little is known about their biology and ecology. Thus, this study aimed at investigating the trophic ecology of five deep-water shark species, the birdbeak dogfish (Deania calcea), the arrowhead (D. profundorum), the smooth lanternshark (Etmopterus pusillus), the blackmouth catshark (Galeus melastomus) and the knifetooth dogfish (Scymnodon ringens) sampled onboard a crustacean bottom-trawler off the south-west coast of Portugal. We combined carbon and nitrogen stable isotopes with RNA and DNA (RD) ratios to investigate the main groups of prey assimilated by these species and their nutritional condition, respectively. Stable isotopes revealed overall small interspecific variability in the contribution of different taxonomic groups to sharks' tissues, as well as in the origin of their prey. S. ringens presented higher delta N-15 and delta C-13 values than the other species, suggesting reliance on bathyal cephalopods, crustaceans and teleosts; the remaining species likely assimilated bathy-mesopelagic prey. The RD ratios indicated that most of the individuals had an overall adequate nutritional condition and had recently eaten. This information, combined with the fact that stable isotopes indicate that sharks assimilated prey from the local or nearby food webs (including commercially important shrimps), suggests a potential overlap between this fishing area and their foraging grounds, which requires further attention. LA/P/0101/2020; SOSF 501 info:eu-repo/semantics/publishedVersion Article in Journal/Newspaper North East Atlantic Universidade do Algarve: Sapienta Fishing Ground ENVELOPE(-55.848,-55.848,49.550,49.550) Journal of Fish Biology 102 3 655 668 |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
English |
topic |
Bottom-trawl Diet Ecophysiology North-east Atlantic RNA DNA Stable isotopes |
spellingShingle |
Bottom-trawl Diet Ecophysiology North-east Atlantic RNA DNA Stable isotopes Graça Aranha, Sofia Teodosio, MA Baptista, Vânia Erzini, Karim Dias, Ester A glimpse into the trophic ecology of deep‐water sharks in an important crustacean fishing ground |
topic_facet |
Bottom-trawl Diet Ecophysiology North-east Atlantic RNA DNA Stable isotopes |
description |
Deep-water sharks are among the most vulnerable deep-water taxa because of their extremely conservative life-history strategies (i.e., late maturation, slow growth, and reproductive rates), yet little is known about their biology and ecology. Thus, this study aimed at investigating the trophic ecology of five deep-water shark species, the birdbeak dogfish (Deania calcea), the arrowhead (D. profundorum), the smooth lanternshark (Etmopterus pusillus), the blackmouth catshark (Galeus melastomus) and the knifetooth dogfish (Scymnodon ringens) sampled onboard a crustacean bottom-trawler off the south-west coast of Portugal. We combined carbon and nitrogen stable isotopes with RNA and DNA (RD) ratios to investigate the main groups of prey assimilated by these species and their nutritional condition, respectively. Stable isotopes revealed overall small interspecific variability in the contribution of different taxonomic groups to sharks' tissues, as well as in the origin of their prey. S. ringens presented higher delta N-15 and delta C-13 values than the other species, suggesting reliance on bathyal cephalopods, crustaceans and teleosts; the remaining species likely assimilated bathy-mesopelagic prey. The RD ratios indicated that most of the individuals had an overall adequate nutritional condition and had recently eaten. This information, combined with the fact that stable isotopes indicate that sharks assimilated prey from the local or nearby food webs (including commercially important shrimps), suggests a potential overlap between this fishing area and their foraging grounds, which requires further attention. LA/P/0101/2020; SOSF 501 info:eu-repo/semantics/publishedVersion |
format |
Article in Journal/Newspaper |
author |
Graça Aranha, Sofia Teodosio, MA Baptista, Vânia Erzini, Karim Dias, Ester |
author_facet |
Graça Aranha, Sofia Teodosio, MA Baptista, Vânia Erzini, Karim Dias, Ester |
author_sort |
Graça Aranha, Sofia |
title |
A glimpse into the trophic ecology of deep‐water sharks in an important crustacean fishing ground |
title_short |
A glimpse into the trophic ecology of deep‐water sharks in an important crustacean fishing ground |
title_full |
A glimpse into the trophic ecology of deep‐water sharks in an important crustacean fishing ground |
title_fullStr |
A glimpse into the trophic ecology of deep‐water sharks in an important crustacean fishing ground |
title_full_unstemmed |
A glimpse into the trophic ecology of deep‐water sharks in an important crustacean fishing ground |
title_sort |
glimpse into the trophic ecology of deep‐water sharks in an important crustacean fishing ground |
publisher |
Wiley |
publishDate |
2023 |
url |
http://hdl.handle.net/10400.1/19241 https://doi.org/10.1111/jfb.15306 |
long_lat |
ENVELOPE(-55.848,-55.848,49.550,49.550) |
geographic |
Fishing Ground |
geographic_facet |
Fishing Ground |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_relation |
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04326%2F2020/PT info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04326%2F2020/PT info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F04423%2F2020/PT info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04423%2F2020/PT info:eu-repo/grantAgreement/FCT/OE/SFRH%2FBD%2F147493%2F2019/PT 0022-1112 http://hdl.handle.net/10400.1/19241 doi:10.1111/jfb.15306 |
op_rights |
openAccess http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/jfb.15306 |
container_title |
Journal of Fish Biology |
container_volume |
102 |
container_issue |
3 |
container_start_page |
655 |
op_container_end_page |
668 |
_version_ |
1766139075080749056 |