British primatologist and renowned environmentalist Jane Goodall described Lotter as her "hero", a man who had faced "stiff opposition and personal threats" in his bid to protect Tanzania's wildlife.
The PAMS Foundation funded and supported Tanzania's elite anti-poaching National and Transnational Serious Crimes Investigation Unit (NTSCIU) which was responsible for arrests of major ivory traffickers including Yang Feng Glan, the so-called "Queen of Ivory" and several other notorious elephant poachers.
"His ground-breaking work in developing an intelligence-based approach to anti-poaching helped successfully reverse the rampant rates of poaching facing Tanzania", the group wrote in a post on its website.
Lotter was the founder of the Pams (Protected Area Management System) foundation in Tanzania in 2009.
"Wayne's charm, brilliance and eccentric sense of humour gave him the unique ability to make those around him constantly laugh and smile".
"There is no doubt in my mind but that Wayne's anti poaching efforts made a big difference in the fight to save Tanzania's elephants from the illegal ivory trade", said Goodall. He died bravely fighting for the cause he was most passionate about.
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"If this cowardly shooting was an attempt to bring the work of the PAMS Foundation to an end it will fail", said Goodall.
Tanzania has been called the "epicentre" of the catastrophic decline, losing some 60 percent of all its elephants in just five years.
Wayne Lotter with his colleagues at PAMS. "Wayne was one of Africa's leading and most committed conservationists".
WildAid, which works to persuade people not to buy wildlife products such as elephant ivory, rhino horn and shark fin, said Mr Lotter was a "fearless and vocal advocate for wildlife and wild places".
The murder is being investigated by Tanzanian authorities.
Lotter is remembered by his wife, Inge, and daughters, Tamsin Inge and Cara Jayne.
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