Researchers conducting a survey on the mortality rate for Amazon dolphins and manatees, recovered 18 dead Amazon dolphins in two areas of the Amazon River Basin in Brazil.
The researchers, from the Mamiraua Institute for Sustainable Development, found three of the dolphins had been stabbed, probably with machetes and harpoons, and left to die. The dead dolphins included six boto species, Inia geoffrensis, also known as Amazon river or pink river dolphins, and 12 tucuxi species, Sotalia fluviatilis. Several of the dolphins were “unmolested.” Their parts were not harvested, suggesting the dolphins were intentionally killed.
Threats to Amazon Freshwater Dolphins
Various practices and beliefs are threatening the Amazon freshwater dolphins. Some are killed for their organs, specifically their eyes and genitals, which are sometimes sold as charms. Their meat and blubber is also used for bait. Whales, dolphins and sea lions are often seen as competitors stealing fish from fishermen and damaging fishing gear.
Local legends, superstition and powerful cultural beliefs may also be playing a part in the killings. The boto is both feared and respected in the Amazon. Some people believe dolphins turn into handsome men who come ashore to seduce young women. And in order to prevent unwanted teenage pregnancies, dolphins are killed.
The researchers suggest that awareness and educational programs, especially for children, is paramount in reducing the attacks and killings of the freshwater dolphin.
The study, Conflicts with fisheries and intentional killing of freshwater dolphins in the Western Brazilian Amazon, was published in the journal of Biodiversity and Conservation.
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