Sightings by marine scientists of dolphins in the north Atlantic's Bay of Biscay have dropped off by 80 percent compared to the same period in 2006, a wildlife conservation group said Wednesday.
The alarming drop in numbers of the Bay's three most common species of dolphin -- the striped, bottlenose and common -- can be attributed to one or both of two causes, Clive Martin, senior wildlife officer for the Biscay Dolphin Research Programme, told AFP.
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