MOKOPANE: South African scientists on Tuesday injected radioactive material into live rhino horns to make them easier to detect at border posts in a pioneering project aimed at curbing poaching.

The country is home to a large majority of the world’s rhinos and as such is a hotspot for poaching driven by demand from Asia, where horns are used in traditional medicine for their supposed therapeutic effect. At the Limpopo rhino orphanage in the Waterberg area, in the country’s northeast, a few of the thick-skinned herbivores grazed in the low savannah.

James Larkin, director of the University of the Witwatersrand’s radiation and health physics unit who spearheaded the initiative, said he had put “two tiny little radioactive chips in the horn” as he administered the radioisotopes on one of the large animals’ horns.

The radioactive material would “render the horn useless... essentially poisonous for human consumption” added Nithaya Chetty, professor and dean of science at the same university. The dusty rhino, put to sleep and crouched on the ground, did not feel any pain, Larkin said. The radioactive material’s dose was so low it would not impact the animal’s health or the environment in any way, he said.

In February the environment ministry said that, despite government efforts to tackle the illicit trade, 499 of the giant mammals were killed in 2023, mostly in state-run parks. This represents an 11 percent increase over the 2022 figures.

Published in Dawn, June 27th, 2024