The population of pink dolphins living in the Pearl River Delta is severely threatened. As few as 180 of these dolphins remain in the waters around Hong Kong, while the total Delta population is estimated at approximately 1000 animals. The main threats for this population are pollution, lack of food due to over-fishing, habitat loss and boat collisions. The Pearl River drains a territory, occupied by one eighth of the population of China, where numerous polluting industries are present and where DDT is still in use. Due to problems of enforcement, a dolphin sanctuary and strict environmental laws have not been sufficient to protect this species.
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The population of pink dolphins living in the Pearl River Delta is severely threatened. As few as 180 of these dolphins remain in the waters around Hong Kong, while the total Delta population is estimated at approximately 1000 animals. The main threats for this population are pollution, lack of food due to over-fishing, habitat loss and boat collisions. The Pearl River drains a territory, occupied by one eighth of the population of China, where numerous polluting industries are present and where DDT is still in use. Due to problems of enforcement, a dolphin sanctuary and strict environmental laws have not been sufficient to protect this species.
http://www.baleinesendirect.net/eng/FSC.htmlsct=3&pag=3-2-2-03.html
http://www.hkdolphinwatch.com/
A northern African population of humpback dolphins co-operate with local fishermen in their fisheries for mullet.
http://ourworld.compuserve.com/homepages/jaap/Sousa.htm
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