Harbour porpoises (Phocoena phocoena) in north-western France: aerial survey, opportunistic sightings and strandings monitoring
International audience The harbour porpoise (Phocoena phocoena) is one of the common small cetaceans of European waters. This discreet and undemonstrative species is strongly represented throughout the cold waters of the northern hemisphere, and is the most abundant cetacean in the North Sea. In the...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
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Online Access: | https://hal.univ-brest.fr/hal-01072192 https://doi.org/10.1017/S0025315409000307 |
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ftunivrochelle:oai:HAL:hal-01072192v1 2023-05-15T16:33:21+02:00 Harbour porpoises (Phocoena phocoena) in north-western France: aerial survey, opportunistic sightings and strandings monitoring Jung, Jean-Luc Stephan, Eric Louis, Marie Alfonsi, Eric Liret, Céline Carpentier, François-Gilles Hassani, Sami Laboratoire de Biologie et génétique des mammifères marins dans leur environnement (BioGEMME) Université de Brest (UBO) Laboratoire d'étude des mammifères marins Océanopolis Brest Centre d'Etudes Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Etude des Mammifères Marins (LEMM) 2009-04-20 https://hal.univ-brest.fr/hal-01072192 https://doi.org/10.1017/S0025315409000307 en eng HAL CCSD Cambridge University Press (CUP) info:eu-repo/semantics/altIdentifier/doi/10.1017/S0025315409000307 hal-01072192 https://hal.univ-brest.fr/hal-01072192 doi:10.1017/S0025315409000307 ISSN: 0025-3154 EISSN: 1469-7769 Journal of the Marine Biological Association of the UK https://hal.univ-brest.fr/hal-01072192 Journal of the Marine Biological Association of the UK, 2009, 89 (05), pp.1045-1050. ⟨10.1017/S0025315409000307⟩ [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics Phylogenetics and taxonomy info:eu-repo/semantics/article Journal articles 2009 ftunivrochelle https://doi.org/10.1017/S0025315409000307 2023-01-03T23:34:22Z International audience The harbour porpoise (Phocoena phocoena) is one of the common small cetaceans of European waters. This discreet and undemonstrative species is strongly represented throughout the cold waters of the northern hemisphere, and is the most abundant cetacean in the North Sea. In the last few years, some observations and studies indicate a shift of harbour porpoise distribution in European waters, from northern regions of the North Sea to the southern North Sea, English Channel and Celtic Sea. This shift may include a comeback around the coasts of France. Harbour porpoises inhabit shelf-waters and are often observed in shallow waters, conditions offered for instance by the coasts of Brittany in north-western France. We used opportunistic sightings, aerial survey and a ten-year strandings database to study the presence of harbour porpoises along the coasts of Brittany. Opportunistic sightings made by non-specialists did not confirm a strong presence of harbour porpoises along the Brittany coasts, most probably because of the undemonstrative behaviour of this cetacean. However, aerial survey and stranding analysis indicate that harbour porpoises have become natural inhabitants of the Brittany coasts once more: 68.6% of cetacean school sightings made during a 1578 km aerial survey of the Brittany coasts concerned harbour porpoises, with an encounter rate of 1.5 individuals per 100 km that peaked to 5.8 per 100 km to the top of the shallow waters of the south-western Western English Channel. The number of harbour porpoise strandings increased each year from 1997 to 2007, making a total of 135 along the coasts of Brittany. Other cetaceans did not show such an increase during the same period. Strandings of harbour porpoises were also characterized by an apparent increase as a proportion in relation to all the cetacean strandings during the months of September to January, by a marked impact of by-catch during winter, and by an almost total absence of stranded calves. The comeback of the harbour ... Article in Journal/Newspaper Harbour porpoise Phocoena phocoena HAL - Université de La Rochelle Journal of the Marine Biological Association of the United Kingdom 89 5 1045 1050 |
institution |
Open Polar |
collection |
HAL - Université de La Rochelle |
op_collection_id |
ftunivrochelle |
language |
English |
topic |
[SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics Phylogenetics and taxonomy |
spellingShingle |
[SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics Phylogenetics and taxonomy Jung, Jean-Luc Stephan, Eric Louis, Marie Alfonsi, Eric Liret, Céline Carpentier, François-Gilles Hassani, Sami Harbour porpoises (Phocoena phocoena) in north-western France: aerial survey, opportunistic sightings and strandings monitoring |
topic_facet |
[SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics Phylogenetics and taxonomy |
description |
International audience The harbour porpoise (Phocoena phocoena) is one of the common small cetaceans of European waters. This discreet and undemonstrative species is strongly represented throughout the cold waters of the northern hemisphere, and is the most abundant cetacean in the North Sea. In the last few years, some observations and studies indicate a shift of harbour porpoise distribution in European waters, from northern regions of the North Sea to the southern North Sea, English Channel and Celtic Sea. This shift may include a comeback around the coasts of France. Harbour porpoises inhabit shelf-waters and are often observed in shallow waters, conditions offered for instance by the coasts of Brittany in north-western France. We used opportunistic sightings, aerial survey and a ten-year strandings database to study the presence of harbour porpoises along the coasts of Brittany. Opportunistic sightings made by non-specialists did not confirm a strong presence of harbour porpoises along the Brittany coasts, most probably because of the undemonstrative behaviour of this cetacean. However, aerial survey and stranding analysis indicate that harbour porpoises have become natural inhabitants of the Brittany coasts once more: 68.6% of cetacean school sightings made during a 1578 km aerial survey of the Brittany coasts concerned harbour porpoises, with an encounter rate of 1.5 individuals per 100 km that peaked to 5.8 per 100 km to the top of the shallow waters of the south-western Western English Channel. The number of harbour porpoise strandings increased each year from 1997 to 2007, making a total of 135 along the coasts of Brittany. Other cetaceans did not show such an increase during the same period. Strandings of harbour porpoises were also characterized by an apparent increase as a proportion in relation to all the cetacean strandings during the months of September to January, by a marked impact of by-catch during winter, and by an almost total absence of stranded calves. The comeback of the harbour ... |
author2 |
Laboratoire de Biologie et génétique des mammifères marins dans leur environnement (BioGEMME) Université de Brest (UBO) Laboratoire d'étude des mammifères marins Océanopolis Brest Centre d'Etudes Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Etude des Mammifères Marins (LEMM) |
format |
Article in Journal/Newspaper |
author |
Jung, Jean-Luc Stephan, Eric Louis, Marie Alfonsi, Eric Liret, Céline Carpentier, François-Gilles Hassani, Sami |
author_facet |
Jung, Jean-Luc Stephan, Eric Louis, Marie Alfonsi, Eric Liret, Céline Carpentier, François-Gilles Hassani, Sami |
author_sort |
Jung, Jean-Luc |
title |
Harbour porpoises (Phocoena phocoena) in north-western France: aerial survey, opportunistic sightings and strandings monitoring |
title_short |
Harbour porpoises (Phocoena phocoena) in north-western France: aerial survey, opportunistic sightings and strandings monitoring |
title_full |
Harbour porpoises (Phocoena phocoena) in north-western France: aerial survey, opportunistic sightings and strandings monitoring |
title_fullStr |
Harbour porpoises (Phocoena phocoena) in north-western France: aerial survey, opportunistic sightings and strandings monitoring |
title_full_unstemmed |
Harbour porpoises (Phocoena phocoena) in north-western France: aerial survey, opportunistic sightings and strandings monitoring |
title_sort |
harbour porpoises (phocoena phocoena) in north-western france: aerial survey, opportunistic sightings and strandings monitoring |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.univ-brest.fr/hal-01072192 https://doi.org/10.1017/S0025315409000307 |
genre |
Harbour porpoise Phocoena phocoena |
genre_facet |
Harbour porpoise Phocoena phocoena |
op_source |
ISSN: 0025-3154 EISSN: 1469-7769 Journal of the Marine Biological Association of the UK https://hal.univ-brest.fr/hal-01072192 Journal of the Marine Biological Association of the UK, 2009, 89 (05), pp.1045-1050. ⟨10.1017/S0025315409000307⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1017/S0025315409000307 hal-01072192 https://hal.univ-brest.fr/hal-01072192 doi:10.1017/S0025315409000307 |
op_doi |
https://doi.org/10.1017/S0025315409000307 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
89 |
container_issue |
5 |
container_start_page |
1045 |
op_container_end_page |
1050 |
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1766023047909736448 |