MITOCHONDRIAL DNA VARIATION AND MATERNAL GENE FLOW AMONG HUMPBACK WHALES OF THE SOUTHERN HEMISPHERE

• Published in: Marine Mammal Science
• Main Authors: Baker, C. S., Flórez‐González, L., Abernethy, B., Rosenbaum, H. C., Slade, R. W., Capella, J., Bannister, J. L.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1998
• Subjects: Antarctic; Antarctic Peninsula; New Zealand; The Antarctic; Tonga; Antarc*; Humpback Whale; Megaptera novaeangliae
• Online Access: http://dx.doi.org/10.1111/j.1748-7692.1998.tb00758.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-7692.1998.tb00758.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-7692.1998.tb00758.x

A bstract Samples of skin tissue were collected by biopsy darting from humpback whales ( Megaptera novaeangliae ) in six seasonal habitats representing three stocks and four regions: Groups IV (western Australia), V western component (eastern Australia), V eastern component (New Zealand and Tonga) and VI (the Antarctic Peninsula and Gorgona Island, Colombia, South America) of the Southern Hemisphere. A variable section of the mitochondrial DNA control region was amplified and sequenced from 84 of these individuals, distinguishing a total of 48 unique sequences ( i. e. , mtDNA nucleotypes). Phylogenetic reconstructions suggested that these nucleotypes form three clades, corresponding to those previously described in a world‐wide survey of humpback whale mtDNA variation, although bootstrap support for two of the clades was relatively low (<50%). An analysis of variance adapted for molecular information showed significant differentiation of nucleotypes among the three Groups (Stocks) and heterogeneity of haplotype diversity among the four regions. A pattern of interchange within and between oceanic basins was demonstrated by the presence of shared identical nucleotypes among humpback whales in regions of the Southern and Northern Hemispheres.