作者: Thomas A. Jefferson , Samuel K. Hung
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摘要: The status of Indo-Pacific humpback dolphins (Sousa chinensis) in Chinese waters (including Taiwan) is reviewed. Within China, range from the Vietnam border north to mouth Yangtze River, and there are estimated be about eight populations China. Little known stock structure, except for a preliminary conclusion that animals Xiamen Hong Kong represent separate populations. Abundance has been only Pearl River Estuary (about 1,500 animals) (80 dolphins). In early 1960s, 36 were killed Harbor, but other direct takes appear rare. Incidental catches Estuary, their impacts not known. Only work on life history conducted. There appears calving peak spring summer, calves 100 cm long at birth. Scant data indicate sexual maturity females may occur 9-10 years age, with males maturing later. Dolphins have indi