Dietary overlap in inshore notothenioid fish from the Danco Coast, western Antarctic Peninsula
We carried out a dietary overlap analysis between notothenioid species by examining the stomach contents of more than 900 specimens collected in a fish assemblage at the Danco Coast, western Antarctic Peninsula, in the summer of 2000. Prey reoccurrences among fish species were 32.2%, with krill Euph...
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ftconicet:oai:ri.conicet.gov.ar:11336/7359 2023-10-09T21:44:59+02:00 Dietary overlap in inshore notothenioid fish from the Danco Coast, western Antarctic Peninsula Casaux, Ricardo Jorge Barrera Oro, Esteban application/pdf http://hdl.handle.net/11336/7359 eng eng Co-action Publishing info:eu-repo/semantics/altIdentifier/url/http://www.polarresearch.net/index.php/polar/article/view/21319 http://hdl.handle.net/11336/7359 Casaux, Ricardo Jorge; Barrera Oro, Esteban; Dietary overlap in inshore notothenioid fish from the Danco Coast, western Antarctic Peninsula; Co-action Publishing; Polar Research; 32; 12-2013; 1-8 0800-0395 1751-8369 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc/2.5/ar/ DIETARY OVERLAP NOTOTHENIOIDS ANTARCTICA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet 2023-09-24T19:15:58Z We carried out a dietary overlap analysis between notothenioid species by examining the stomach contents of more than 900 specimens collected in a fish assemblage at the Danco Coast, western Antarctic Peninsula, in the summer of 2000. Prey reoccurrences among fish species were 32.2%, with krill Euphausia superba, salps and the gammaridean Prostebeingia longicornis the most reoccurring prey. The diet similarity between species pairs was lower than 55%, in accordance with similar fish assemblages in the South Orkney Islands, the South Shetland Islands and the Antarctic Peninsula. Whereas at those localities the higher prey overlap was between krill-feeding fish species, at the Danco Coast it was between Trematomus bernacchii and Lepidonotothen nudifrons, Notothenia coriiceps and Notothenia rossii, Notothenia coriiceps and Parachaenichthyis charcoti, and Trematomus newnesi and Notothenia rossii, which shared primarily gammaridean amphipods, algae, fish and krill, respectively. Krill is normally the main prey of fish in summer in inshore waters of the western Antarctic Peninsula, but its density in January/February 2000 was notably lower than in previous years. Therefore, at the Danco Coast, under conditions of krill shortage, most of the notothenioid species foraged more intensively on alternative prey, such as gammarideans, fish and algae. The difference between areas in the pattern of dietary overlap might be related to differences in prey availability between years and to the degree of competition for targeted prey. Fil: Casaux, Ricardo Jorge. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Barrera Oro, Esteban. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Dirección Nacional del Antártico Euphausia superba Instituto Antártico Argentino Notothenia rossii Polar Research South Orkney Islands South Shetland Islands CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Antarctic Peninsula South Shetland Islands Argentino Argentina South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) Ricardo ENVELOPE(-63.033,-63.033,-64.867,-64.867) Danco ENVELOPE(-61.033,-61.033,-64.717,-64.717) Danco Coast ENVELOPE(-62.000,-62.000,-64.700,-64.700) |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
DIETARY OVERLAP NOTOTHENIOIDS ANTARCTICA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
DIETARY OVERLAP NOTOTHENIOIDS ANTARCTICA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Casaux, Ricardo Jorge Barrera Oro, Esteban Dietary overlap in inshore notothenioid fish from the Danco Coast, western Antarctic Peninsula |
topic_facet |
DIETARY OVERLAP NOTOTHENIOIDS ANTARCTICA https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
We carried out a dietary overlap analysis between notothenioid species by examining the stomach contents of more than 900 specimens collected in a fish assemblage at the Danco Coast, western Antarctic Peninsula, in the summer of 2000. Prey reoccurrences among fish species were 32.2%, with krill Euphausia superba, salps and the gammaridean Prostebeingia longicornis the most reoccurring prey. The diet similarity between species pairs was lower than 55%, in accordance with similar fish assemblages in the South Orkney Islands, the South Shetland Islands and the Antarctic Peninsula. Whereas at those localities the higher prey overlap was between krill-feeding fish species, at the Danco Coast it was between Trematomus bernacchii and Lepidonotothen nudifrons, Notothenia coriiceps and Notothenia rossii, Notothenia coriiceps and Parachaenichthyis charcoti, and Trematomus newnesi and Notothenia rossii, which shared primarily gammaridean amphipods, algae, fish and krill, respectively. Krill is normally the main prey of fish in summer in inshore waters of the western Antarctic Peninsula, but its density in January/February 2000 was notably lower than in previous years. Therefore, at the Danco Coast, under conditions of krill shortage, most of the notothenioid species foraged more intensively on alternative prey, such as gammarideans, fish and algae. The difference between areas in the pattern of dietary overlap might be related to differences in prey availability between years and to the degree of competition for targeted prey. Fil: Casaux, Ricardo Jorge. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Barrera Oro, Esteban. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina |
format |
Article in Journal/Newspaper |
author |
Casaux, Ricardo Jorge Barrera Oro, Esteban |
author_facet |
Casaux, Ricardo Jorge Barrera Oro, Esteban |
author_sort |
Casaux, Ricardo Jorge |
title |
Dietary overlap in inshore notothenioid fish from the Danco Coast, western Antarctic Peninsula |
title_short |
Dietary overlap in inshore notothenioid fish from the Danco Coast, western Antarctic Peninsula |
title_full |
Dietary overlap in inshore notothenioid fish from the Danco Coast, western Antarctic Peninsula |
title_fullStr |
Dietary overlap in inshore notothenioid fish from the Danco Coast, western Antarctic Peninsula |
title_full_unstemmed |
Dietary overlap in inshore notothenioid fish from the Danco Coast, western Antarctic Peninsula |
title_sort |
dietary overlap in inshore notothenioid fish from the danco coast, western antarctic peninsula |
publisher |
Co-action Publishing |
url |
http://hdl.handle.net/11336/7359 |
long_lat |
ENVELOPE(-45.500,-45.500,-60.583,-60.583) ENVELOPE(-63.033,-63.033,-64.867,-64.867) ENVELOPE(-61.033,-61.033,-64.717,-64.717) ENVELOPE(-62.000,-62.000,-64.700,-64.700) |
geographic |
Antarctic The Antarctic Antarctic Peninsula South Shetland Islands Argentino Argentina South Orkney Islands Ricardo Danco Danco Coast |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula South Shetland Islands Argentino Argentina South Orkney Islands Ricardo Danco Danco Coast |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Dirección Nacional del Antártico Euphausia superba Instituto Antártico Argentino Notothenia rossii Polar Research South Orkney Islands South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Dirección Nacional del Antártico Euphausia superba Instituto Antártico Argentino Notothenia rossii Polar Research South Orkney Islands South Shetland Islands |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://www.polarresearch.net/index.php/polar/article/view/21319 http://hdl.handle.net/11336/7359 Casaux, Ricardo Jorge; Barrera Oro, Esteban; Dietary overlap in inshore notothenioid fish from the Danco Coast, western Antarctic Peninsula; Co-action Publishing; Polar Research; 32; 12-2013; 1-8 0800-0395 1751-8369 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc/2.5/ar/ |
_version_ |
1779315058825756672 |