Ecologists have long known that agricultural and sewage pollution can cause low oxygen conditions and fish kills in rivers. A study published today in Nature Communications reports that hippo waste ...

Authorities in the East African country of Tanzania have banned fishing in the transboundary Mara River after a toxic spill of cow excrement and urine caused pollution that killed hundreds of fish, ...

The National Environmental Management Authority (Nema), Public Health Ministry and Kenya Wildlife Service are investigating the deaths of fish in Mara River. Conservationists suspect the deaths that ...

In the Mara River in Kenya, an overload of hippo feces can deplete the oxygen in the river water, resulting in mass fish die-offs downstream, a new study has found. Hippo pools are not just ...