Seasonal occurrence of the killer whale (Orcinus orca : morphotype A) off New Caledonia
International audience Little is known about the population of killer whales Orcinus orca that occurs in the Coral Sea. Only three sightings made during the decade 1991-2000 have been reported in the scientific literature; no stranding has been recorded up to 2006; no killer whale has been sighted d...
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ftccsdartic:oai:HAL:hal-03697529v1 2023-12-17T10:32:53+01:00 Seasonal occurrence of the killer whale (Orcinus orca : morphotype A) off New Caledonia Présence saisonnière de l'orque (Orcinus orca : morphotype A) au large de la Nouvelle-Calédonie Borsa, Philippe Institut de Recherche pour le Développement (IRD) Ecologie marine tropicale des océans Pacifique et Indien (ENTROPIE Nouvelle-Calédonie ) Institut de Recherche pour le Développement (IRD Nouvelle-Calédonie )-Délégation Ifremer de Nouvelle-Calédonie Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de la Nouvelle-Calédonie (UNC) Institut de recherche pour le développement 2022 https://hal.science/hal-03697529 https://hal.science/hal-03697529/document https://hal.science/hal-03697529/file/Orques%20NC_BullSZF_v.%20haL.pdf fr fre HAL CCSD Société Zoologique De France hal-03697529 https://hal.science/hal-03697529 https://hal.science/hal-03697529/document https://hal.science/hal-03697529/file/Orques%20NC_BullSZF_v.%20haL.pdf IRD: fdi:010085474 info:eu-repo/semantics/OpenAccess ISSN: 0037-962X Bulletin De La Société Zoologique De France https://hal.science/hal-03697529 Bulletin De La Société Zoologique De France, 2022, 147 (2), pp.51-56 Coral Sea seasonality predation morphotype marine mammal mer de Corail saisonnalité migration prédation mammifère marin [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2022 ftccsdartic 2023-11-19T00:09:02Z International audience Little is known about the population of killer whales Orcinus orca that occurs in the Coral Sea. Only three sightings made during the decade 1991-2000 have been reported in the scientific literature; no stranding has been recorded up to 2006; no killer whale has been sighted during extensive aerial surveys all around New Caledonia from October to December 2014. However, several images and video records are available from the Internet. The objectives of the present work are to compile observations of killer whales made over the last three decades off New Caledonia in the eastern Coral Sea, to examine the temporal pattern of killer whale occurrence, and to identify their morphotype. Accounts of killer whale sightings were obtained from interviews with yachtsmen and women, from searching the local daily newspapers Nouvelles Calédoniennes, and from searching the Internet. Nine unpublished sightings of killer whales were recorded between 1993 and 2017. Six of these observations were supported by photographs or videographic records, making it possible to characterize individual morphotypes. All sightings but one were outside the barrier reef off the western coast of New Caledonia; one observation was made inside the southern lagoon of New Caledonia in a channel between two passes. The period of killer whale occurrence was from July to December with a peak in August, that is, mostly during the austral winter season, with an extension into the first month of the austral summer. All individuals for which there was sufficient photographic evidence of pigmentation patterns had the following characteristics: supra-ocular white patch elongated and roughly elliptical, with long axis horizontal or quasi-horizontal; its length was ~0.85 to ~1.1 times that of the basis of dorsal fin (N = 6) and ~0.22 to ~0.24 times the distance of snout to abscissa of dorsal fin origin (N = 6); long axis was ~2.8 to ~3.8 times the small axis (N = 2); grey saddle patch posterior to dorsal fin moderately large and ... Article in Journal/Newspaper Killer Whale Orca Orcinus orca Killer whale Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Austral White Patch ENVELOPE(-55.898,-55.898,49.750,49.750) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
French |
topic |
Coral Sea seasonality predation morphotype marine mammal mer de Corail saisonnalité migration prédation mammifère marin [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
Coral Sea seasonality predation morphotype marine mammal mer de Corail saisonnalité migration prédation mammifère marin [SDE.BE]Environmental Sciences/Biodiversity and Ecology Borsa, Philippe Seasonal occurrence of the killer whale (Orcinus orca : morphotype A) off New Caledonia |
topic_facet |
Coral Sea seasonality predation morphotype marine mammal mer de Corail saisonnalité migration prédation mammifère marin [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience Little is known about the population of killer whales Orcinus orca that occurs in the Coral Sea. Only three sightings made during the decade 1991-2000 have been reported in the scientific literature; no stranding has been recorded up to 2006; no killer whale has been sighted during extensive aerial surveys all around New Caledonia from October to December 2014. However, several images and video records are available from the Internet. The objectives of the present work are to compile observations of killer whales made over the last three decades off New Caledonia in the eastern Coral Sea, to examine the temporal pattern of killer whale occurrence, and to identify their morphotype. Accounts of killer whale sightings were obtained from interviews with yachtsmen and women, from searching the local daily newspapers Nouvelles Calédoniennes, and from searching the Internet. Nine unpublished sightings of killer whales were recorded between 1993 and 2017. Six of these observations were supported by photographs or videographic records, making it possible to characterize individual morphotypes. All sightings but one were outside the barrier reef off the western coast of New Caledonia; one observation was made inside the southern lagoon of New Caledonia in a channel between two passes. The period of killer whale occurrence was from July to December with a peak in August, that is, mostly during the austral winter season, with an extension into the first month of the austral summer. All individuals for which there was sufficient photographic evidence of pigmentation patterns had the following characteristics: supra-ocular white patch elongated and roughly elliptical, with long axis horizontal or quasi-horizontal; its length was ~0.85 to ~1.1 times that of the basis of dorsal fin (N = 6) and ~0.22 to ~0.24 times the distance of snout to abscissa of dorsal fin origin (N = 6); long axis was ~2.8 to ~3.8 times the small axis (N = 2); grey saddle patch posterior to dorsal fin moderately large and ... |
author2 |
Institut de Recherche pour le Développement (IRD) Ecologie marine tropicale des océans Pacifique et Indien (ENTROPIE Nouvelle-Calédonie ) Institut de Recherche pour le Développement (IRD Nouvelle-Calédonie )-Délégation Ifremer de Nouvelle-Calédonie Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de la Nouvelle-Calédonie (UNC) Institut de recherche pour le développement |
format |
Article in Journal/Newspaper |
author |
Borsa, Philippe |
author_facet |
Borsa, Philippe |
author_sort |
Borsa, Philippe |
title |
Seasonal occurrence of the killer whale (Orcinus orca : morphotype A) off New Caledonia |
title_short |
Seasonal occurrence of the killer whale (Orcinus orca : morphotype A) off New Caledonia |
title_full |
Seasonal occurrence of the killer whale (Orcinus orca : morphotype A) off New Caledonia |
title_fullStr |
Seasonal occurrence of the killer whale (Orcinus orca : morphotype A) off New Caledonia |
title_full_unstemmed |
Seasonal occurrence of the killer whale (Orcinus orca : morphotype A) off New Caledonia |
title_sort |
seasonal occurrence of the killer whale (orcinus orca : morphotype a) off new caledonia |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-03697529 https://hal.science/hal-03697529/document https://hal.science/hal-03697529/file/Orques%20NC_BullSZF_v.%20haL.pdf |
long_lat |
ENVELOPE(-55.898,-55.898,49.750,49.750) |
geographic |
Austral White Patch |
geographic_facet |
Austral White Patch |
genre |
Killer Whale Orca Orcinus orca Killer whale |
genre_facet |
Killer Whale Orca Orcinus orca Killer whale |
op_source |
ISSN: 0037-962X Bulletin De La Société Zoologique De France https://hal.science/hal-03697529 Bulletin De La Société Zoologique De France, 2022, 147 (2), pp.51-56 |
op_relation |
hal-03697529 https://hal.science/hal-03697529 https://hal.science/hal-03697529/document https://hal.science/hal-03697529/file/Orques%20NC_BullSZF_v.%20haL.pdf IRD: fdi:010085474 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1785586724658741248 |