Water Pollution Killing Whales
Over a quarter of all deaths of adult beluga whales in Canada?s Saint Lawrence Estuary are caused by cancer, researchers have found. Such high rates of cancer are unprecedented in wild animals, except for fish. Industrial pollution is the most likely cause.
Belugas live entirely in the Arctic and sub-Arctic. There are approximately 70,000 worldwide and about 650 of these live in a small region of the St. Lawrence Estuary in Quebec. Between 1983 and 1999, 263 dead whales were reported. Daniel Martineau of the University of Montreal and his team conducted 100 autopsies of the whales and found that cancer, particularly cancer of the digestive tract, was the cause of death of 18 per cent of juvenile belugas and 27 per cent of the adults.
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