Over 100 river dolphin carcasses have been discovered in a tributary of the Amazon River, with experts suspecting severe drought and high temperatures as the likely causes of death.
The dolphins may have succumbed to the intolerable heat in the water due to low river levels during the drought. In addition, a lack of oxygen has led to thousands of fish deaths in Amazon rivers.
Notably, around 70 carcasses appeared when the water temperature in a lake formed by the river Tefé rose to 39 degrees Celsius, significantly exceeding the usual temperature for this season.
Researchers have yet to confirm with certainty that drought and heat are to blame, as they continue to investigate other causes such as bacterial infections.
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