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Mysterious Mass Elephant Die-Off in Botswana Was Caused by Cyanobacteria Poisoning

by | Sep 22, 2020 | New, News

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(National Parks Rescue/AFP) NATURE Mysterious Mass Elephant Die-Off in Botswana Was Caused by Cyanobacteria Poisoning AFP 22 SEPTEMBER 2020

Hundreds of elephants that died mysteriously in Botswana's famed Okavango Delta succumbed to cyanobacteria poisoning, the wildlife department revealed on Monday.

The landlocked southern African country boasts the world's largest elephant population, estimated at around 130,000.

More than 300 of the pachyderms have mysteriously died since March, with their intact tusks ruling out the hypothesis that they were killed by poachers.

"The deaths were caused by poisoning due to cyanobacteria which was growing in pans" or watering holes, the principal veterinary officer of the Department of Wildlife and National Parks, Mmadi Reuben, told reporters.

Reuben said the deaths had "stopped towards the end of June 2020, coinciding with the drying of pans."

A first report of unusual elephant deaths on April 25 identified cases near Seronga village, and numbers began escalating the following month.

According to the wildlife authorities around 330 animals have died and blood tests were consistent with the finding that a species of cyanobacteria that produces neurotoxins was the cause.

Tests were conducted at specialist laboratories in South Africa, Canada, Zimbabwe, and the United States.

Officials have ruled out anthrax or human involvement such as poaching, according to Cyril Taolo, deputy director of Department of Wildlife and National Parks.

The government said it was continuing studies into the occurrence of the bacteria.

In the winter, elephants hydrate themselves mainly by eating roots and bark, especially of the baobab tree.

© Agence France-Presse

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