1. Environmental and Life Sciences, Trent University, Peterborough, Ontario, Canada
2. Institute of Ocean and Earth Sciences, University of Malaya, Kuala Lumpur, Malaysia
3. CetAsia Research Group, Thornhill, Ontario, Canada
4. Institute of Biological Sciences, University of Malaya, Kuala Lumpur, Malaysia
5. Hong Kong Cetacean Research Project, Lam Tin, Kowloon, Hong Kong