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Tucuxi Amazon river dolphins (Sotalia fluviatilis). Projeto Boto

By Claire Asher

Populations of two species of river dolphin in the Amazon are halving every decade, according to the results of a twenty-two year survey.

The Amazon rainforest is home to the Amazon river dolphin, or Boto (Inia geoffrensis) and the Tucuxi (Sotalia fluviatilis). But the results of a long-term study published in PLoS ONE show that both of these once abundant aquatic mammals are now in rapid decline in the Brazilian Amazon, likely due to hunting and fishing.

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