Publications des scientifiques de l'IRD

Steel D., Anderson M., Garrigue Claire, Olavarria C., Caballero S., Childerhouse S., Clapham P., Constantine R., Dawson S., Donoghue M., Florez-Gonzalez L., Gibbs N., Hauser N., Oremus M., Paton D., Poole M. M., Robbins J., Slooten L., Thiele D., Ward J., Baker C. S. (2018). Migratory interchange of humpback whales (Megaptera novaeangliae) among breeding grounds of Oceania and connections to Antarctic feeding areas based on genotype matching. Polar Biology, 41 (4), p. 653-662. ISSN 0722-4060.

Titre du document
Migratory interchange of humpback whales (Megaptera novaeangliae) among breeding grounds of Oceania and connections to Antarctic feeding areas based on genotype matching
Année de publication
2018
Type de document
Article référencé dans le Web of Science WOS:000428603800006
Auteurs
Steel D., Anderson M., Garrigue Claire, Olavarria C., Caballero S., Childerhouse S., Clapham P., Constantine R., Dawson S., Donoghue M., Florez-Gonzalez L., Gibbs N., Hauser N., Oremus M., Paton D., Poole M. M., Robbins J., Slooten L., Thiele D., Ward J., Baker C. S.
Source
Polar Biology, 2018, 41 (4), p. 653-662 ISSN 0722-4060
Humpback whales (Megaptera novaeangliae) congregate to breed during the austral winter near tropical islands of the South Pacific (Oceania). It has long been assumed that humpback whales from Oceania migrate primarily to Antarctic feeding grounds directly south (International Whaling Commission Management Areas V and VI); however, there are few records of individual movement connecting these seasonal habitats. Based on genetic samples of living whales collected over nearly two decades, we demonstrate interchange between the breeding grounds of Oceania and Antarctic feeding Areas V, VI, and I (i.e., from 130A degrees E to 60A degrees W), as well as with the eastern Pacific (Colombia), and the migratory corridors of eastern Australia and New Zealand. We first compared genotype profiles (up to 16 microsatellite loci) of samples collected from Oceania breeding grounds to each other and to those from the eastern Pacific. The matching profiles documented 47 individuals that were present on more than one breeding ground, including the first record of movement between Oceania and Colombia. We then compared the 1179 genotypes from the breeding grounds to 777 from the migratory corridors of east Australia and New Zealand, confirming the connection of these corridors with New Caledonia. Finally, we compared genotypes from breeding grounds to 166 individuals from Antarctic feeding Areas I-VI. This comparison of genotypes revealed five matches: one between New Caledonia and Area V, one between Tonga and Area VI, two between Tonga and Area I (western edge), and one between Colombia and Area I (Antarctic Peninsula). Despite the relatively small number of samples from the Antarctic, our comparison has doubled the number of recorded connections with Oceania available from previous studies during the era of commercial whaling.
Plan de classement
Limnologie biologique / Océanographie biologique [034]
Description Géographique
PACIFIQUE SUD ; OCEANIE ; ANTARCTIQUE ; NOUVELLE CALEDONIE ; TONGA ; SAMOA: COOK ILES ; POLYNESIE FRANCAISE ; COLOMBIE ; AUSTRALIE ; NOUVELLE ZELANDE
Localisation
Fonds IRD [F B010072693]
Identifiant IRD
fdi:010072693
Contact