Photo-identification confirms that humpback whales (Megaptera novaeangliae) from eastern Australia migrate past New Zealand but indicates low levels of interchange with breeding grounds of Oceania

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Wally Franklin
Trish Franklin
Nadine Gibbs
Simon Childerhouse
Claire Garrigue
Rochelle Constantine
Lyndon Brooks
Daniel Burns
David Paton
Michael Poole
Nan Hauser
Michael Donoghue
Kirsty Russell
David K. Mattila
Jooke Robbins
Megan Anderson
Carlos Olavarria
Jennifer Jackson
Michael Noad
Peter Harrison
Peter Baverstock
Russell Leaper
Scott Baker
Phil Clapham

Abstract

Recent photo-identification and genetic studies have identified at least five discrete breeding populations in Australia and Oceania: western Australia (D), eastern Australia (E (i)), New Caledonia (E (ii)), Tonga (E (iii)), French Polynesia and the Cook Islands (F). Also evident are low levels of intermingling among breeding populations consistent with the degree of genetic differentiation. Photo-identification has confirmed linkages between Area V feeding areas and eastern Australia breeding grounds and one genotype match has been reported between Area V feeding areas and Oceania breeding grounds. Recent abundance estimates show strong increases in the eastern Australian population, and some recovery in the New Caledonia and Tonga populations, but with little evidence of recovery at other known Oceania breeding grounds or New Zealand. Studies to date have provided no conclusive evidence of the migratory destination of humpback whales passing through New Zealand waters en route between Antarctic feeding areas and tropical breeding grounds. Photo-identification comparisons were undertaken between humpback whale fluke catalogues from eastern Australia (EA, 1315), Oceania east (OE, 513), Oceania west (OW, 166) and New Zealand (NZ, 13). Five matches were found between OE/OW, four matches between OW/EA and three matches between NZ/EA. The data are used to investigate and discuss the migratory destination and breeding ground migratory interchange of humpback whales travelling through New Zealand waters. The data confirm that humpback whales with site fidelity to eastern Australia migrate past New Zealand including through the Cook Strait and Foveaux Strait.

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How to Cite
1.
Franklin W, Franklin T, Gibbs N, Childerhouse S, Garrigue C, Constantine R, Brooks L, Burns D, Paton D, Poole M, Hauser N, Donoghue M, Russell K, Mattila DK, Robbins J, Anderson M, Olavarria C, Jackson J, Noad M, Harrison P, Baverstock P, Leaper R, Baker S, Clapham P. Photo-identification confirms that humpback whales (Megaptera novaeangliae) from eastern Australia migrate past New Zealand but indicates low levels of interchange with breeding grounds of Oceania. JCRM [Internet]. 2023 Feb. 1 [cited 2024 May 25];14(1):133-40. Available from: https://stage.tae.netxtra.net/index.php/jcrm/article/view/530
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