Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea
In the northwestern Mediterranean Sea, sperm whales, pilot whales and Risso's dolphins prey exclusively or preferentially on cephalopods. In order to evaluate their competition, we modelled their habitat suitability with the Ecological Niche Factor Analysis (ENFA) and compared their ecological...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:c6957eb531df451db0f3a26901d3d530 2023-05-15T18:26:37+02:00 Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea E. Praca A. Gannier 2008-02-01 http://www.ocean-sci.net/4/49/2008/os-4-49-2008.pdf https://doaj.org/article/c6957eb531df451db0f3a26901d3d530 en eng Copernicus Publications 1812-0784 1812-0792 http://www.ocean-sci.net/4/49/2008/os-4-49-2008.pdf https://doaj.org/article/c6957eb531df451db0f3a26901d3d530 undefined Ocean Science, Vol 4, Iss 1, Pp 49-59 (2008) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2008 fttriple 2023-01-22T19:29:29Z In the northwestern Mediterranean Sea, sperm whales, pilot whales and Risso's dolphins prey exclusively or preferentially on cephalopods. In order to evaluate their competition, we modelled their habitat suitability with the Ecological Niche Factor Analysis (ENFA) and compared their ecological niches using a discriminant analysis. We used a long term (1995–2005) small boat data set, with visual and acoustic (sperm whale) detections. Risso's dolphin had the shallowest and the more spatially restricted principal habitat, mainly located on the upper part of the continental slope (640 m mean depth). With a wider principal habitat, at 1750 m depth in average, the sperm whale used a deeper part of the slope as well as the closest offshore waters. Finally, the pilot whale has the most oceanic habitat (2500 m mean depth) mainly located in the central Ligurian Sea and Provençal basin. Therefore, potential competition for food between these species may be reduced by the differentiation of their habitats. Article in Journal/Newspaper Sperm whale Unknown |
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envir geo E. Praca A. Gannier Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea |
topic_facet |
envir geo |
description |
In the northwestern Mediterranean Sea, sperm whales, pilot whales and Risso's dolphins prey exclusively or preferentially on cephalopods. In order to evaluate their competition, we modelled their habitat suitability with the Ecological Niche Factor Analysis (ENFA) and compared their ecological niches using a discriminant analysis. We used a long term (1995–2005) small boat data set, with visual and acoustic (sperm whale) detections. Risso's dolphin had the shallowest and the more spatially restricted principal habitat, mainly located on the upper part of the continental slope (640 m mean depth). With a wider principal habitat, at 1750 m depth in average, the sperm whale used a deeper part of the slope as well as the closest offshore waters. Finally, the pilot whale has the most oceanic habitat (2500 m mean depth) mainly located in the central Ligurian Sea and Provençal basin. Therefore, potential competition for food between these species may be reduced by the differentiation of their habitats. |
format |
Article in Journal/Newspaper |
author |
E. Praca A. Gannier |
author_facet |
E. Praca A. Gannier |
author_sort |
E. Praca |
title |
Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea |
title_short |
Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea |
title_full |
Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea |
title_fullStr |
Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea |
title_full_unstemmed |
Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea |
title_sort |
ecological niches of three teuthophageous odontocetes in the northwestern mediterranean sea |
publisher |
Copernicus Publications |
publishDate |
2008 |
url |
http://www.ocean-sci.net/4/49/2008/os-4-49-2008.pdf https://doaj.org/article/c6957eb531df451db0f3a26901d3d530 |
genre |
Sperm whale |
genre_facet |
Sperm whale |
op_source |
Ocean Science, Vol 4, Iss 1, Pp 49-59 (2008) |
op_relation |
1812-0784 1812-0792 http://www.ocean-sci.net/4/49/2008/os-4-49-2008.pdf https://doaj.org/article/c6957eb531df451db0f3a26901d3d530 |
op_rights |
undefined |
_version_ |
1766208591337881600 |