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Ecological Niches of Three Teuthophageous Odontocetes in the Northwestern Mediterranean Sea : Volume 4, Issue 1 (07/02/2008)

By Praca, E.

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Book Id: WPLBN0004020366
Format Type: PDF Article :
File Size: Pages 11
Reproduction Date: 2015

Title: Ecological Niches of Three Teuthophageous Odontocetes in the Northwestern Mediterranean Sea : Volume 4, Issue 1 (07/02/2008)  
Author: Praca, E.
Volume: Vol. 4, Issue 1
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Gannier, A., & Praca, E. (2008). Ecological Niches of Three Teuthophageous Odontocetes in the Northwestern Mediterranean Sea : Volume 4, Issue 1 (07/02/2008). Retrieved from

Description: Centre de Recherche sur les Cétacés – Marineland, Antibes, France. 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.

Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea

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