Records of bottlenose dolphins, Tursiops spp., in New Caledonian waters

Abstract : Observations of bottlenose dolphins, Tursiops spp. were made opportunistically between 1993 and 2009 in New Caledonian waters (eastern Coral Sea, southwestern Pacific). Two morphotypes, defined from pigmentation patterns, were observed: morphotype-B individuals possessed a distinctive, extensive pale-grey blaze that indents the darker-grey dorsal cape towards the basis of the dorsal fin while morphotype-A individuals lacked it. Morphotype-A bottlenose dolphins occurred in pods of 2-10 individuals whereas pods of morphotype-B bottlenose dolphins comprised up to ~30 individuals. All morphotype-A bottlenose dolphin sightings were made in inshore waters, and all morphotype-B bottlenose dolphin sightings were made offshore. Wounds inflicted by large sharks, including the tiger shark, were documented for morphotype-A bottlenose dolphins. Leisure-boat traffic is likely to be the cause of additional injuries to bottlenose dolphins in the New Caledonian lagoon. Pigmentation patterns and correlated habitat preferences of morphotype-A and B bottlenose dolphins were consistent with those of, respectively, T. aduncus and T. truncatus in the western Coral Sea and elsewhere in the Pacific Ocean.
Document type :
Journal articles
Complete list of metadatas

Cited literature [9 references]  Display  Hide  Download

http://hal.ird.fr/ird-00708068
Contributor : Philippe Borsa <>
Submitted on : Monday, October 15, 2012 - 7:50:39 AM
Last modification on : Friday, February 23, 2018 - 6:10:03 AM
Long-term archiving on : Wednesday, January 16, 2013 - 3:37:19 AM

File

Tursiops_Borsa_et_al_p._HAL_v2...
Files produced by the author(s)

Identifiers

  • HAL Id : ird-00708068, version 2

Collections

Citation

Philippe Borsa, Serge Andréfouët, Matthieu Juncker. Records of bottlenose dolphins, Tursiops spp., in New Caledonian waters. Marine Biodiversity Records, Cambridge University Press, 2012, 5, pp.e53. ⟨ird-00708068v2⟩

Share

Metrics

Record views

271

Files downloads

388