[1
]Sea Mammal Research Unit; School of Biology; University of St Andrews; St Andrews
Fife KY16 8LB United Kingdom
[2
]Mammal Research Institute; Department of Zoology and Entomology; University of Pretoria;
Pretoria 0002 South Africa
[3
]Centre for Dolphin Studies; Department of Zoology; Nelson Mandela Metropolitan University;
Port Elizabeth Eastern Cape 6031 South Africa
[4
]School of Environmental Science & Management; School of Tourism & Hospitality Management;
Southern Cross University; PO Box 157 Lismore New South Wales 2480 Australia
[5
]Cardno Ecology Lab; 4 Green Street Brookvale 2100 New South Wales Australia
[6
]Wildlife Research Center of Kyoto University; Tanaka-Sekiden-cho Sakyo-ku Kyoto 606-8203
Japan