The World Wide Fund for Nature has raised the red-flag after 192 elephant carcasses were found in the Mara-Serengeti ecosystem during an aerial survey.
Of the carcasses with no tusks, 117 are on the Kenyan side while 75 in Tanzania.
Robert Ndetei from WWF said 84 per cent of the carcasses were outside the Masai Mara Game Reserve.
"An aerial report released on Thursday in Arusha has revealed a worrying number of elephant carcasses in the world famous Mara-Serengeti ecosystem," he said in Naivasha yesterday.
Ndetei urged the two governments to strengthen their elephant management strategies.
"Conservationists are calling for better management of elephants outside protected areas through strengthened community conservancies," he said.
Ndetei said WWF is working with the two governments to stop poaching.
Some of the measures include acquiring anti-poaching equipment and technology, and engaging communities and private sector in anti-poaching campaigns.
Other measures include carrying out elephant censuses and working with communities to reduce human-wildlife conflict.
During the aerial survey, 7,535 elephants and 61,896 buffaloes were counted.