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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ftdoajarticles: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 2008-02-01T00:00:00Z https://doaj.org/article/c6957eb531df451db0f3a26901d3d530 EN eng Copernicus Publications http://www.ocean-sci.net/4/49/2008/os-4-49-2008.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 1812-0784 1812-0792 https://doaj.org/article/c6957eb531df451db0f3a26901d3d530 Ocean Science, Vol 4, Iss 1, Pp 49-59 (2008) Geography. Anthropology. Recreation G Environmental sciences GE1-350 article 2008 ftdoajarticles 2022-12-31T02:55:47Z 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 Directory of Open Access Journals: DOAJ Articles |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
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Geography. Anthropology. Recreation G Environmental sciences GE1-350 E. Praca A. Gannier Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea |
topic_facet |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
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 |
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 |
http://www.ocean-sci.net/4/49/2008/os-4-49-2008.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 1812-0784 1812-0792 https://doaj.org/article/c6957eb531df451db0f3a26901d3d530 |
_version_ |
1766208593516822528 |