Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea
International audience 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 com...
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ftccsdartic:oai:HAL:hal-00331149v1 2023-11-12T04:26:48+01:00 Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea Praca, E. Gannier, A. Groupe de Recherche sur les Cétacés Marineland MARE Center Laboratory for Oceanology 2008-02-07 https://hal.science/hal-00331149 https://hal.science/hal-00331149/document https://hal.science/hal-00331149/file/os-4-49-2008.pdf en eng HAL CCSD European Geosciences Union hal-00331149 https://hal.science/hal-00331149 https://hal.science/hal-00331149/document https://hal.science/hal-00331149/file/os-4-49-2008.pdf info:eu-repo/semantics/OpenAccess ISSN: 1812-0784 EISSN: 1812-0792 Ocean Science https://hal.science/hal-00331149 Ocean Science, 2008, 4 (1), pp.49-59 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2008 ftccsdartic 2023-10-21T23:02:44Z International audience 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Praca, E. Gannier, A. Ecological niches of three teuthophageous odontocetes in the northwestern Mediterranean Sea |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience 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. |
author2 |
Groupe de Recherche sur les Cétacés Marineland MARE Center Laboratory for Oceanology |
format |
Article in Journal/Newspaper |
author |
Praca, E. Gannier, A. |
author_facet |
Praca, E. Gannier, A. |
author_sort |
Praca, E. |
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 |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.science/hal-00331149 https://hal.science/hal-00331149/document https://hal.science/hal-00331149/file/os-4-49-2008.pdf |
genre |
Sperm whale |
genre_facet |
Sperm whale |
op_source |
ISSN: 1812-0784 EISSN: 1812-0792 Ocean Science https://hal.science/hal-00331149 Ocean Science, 2008, 4 (1), pp.49-59 |
op_relation |
hal-00331149 https://hal.science/hal-00331149 https://hal.science/hal-00331149/document https://hal.science/hal-00331149/file/os-4-49-2008.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782340642768158720 |