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UFS scientists contribute to effectiveness of vulture restaurants

03 January 2020 | Story Leonie Bolleurs | Photo Leonie Bolleurs

Endangerd read more — Prof Aliza le Roux and Dr Mpho Ramoejane at the vulture restaurant, nearly 30 km from Clarens. This is a safe space for vultures to feed, in an effort to increase their declining numbers.

Endangered bird species such as the Cape and bearded vultures attract bird enthusiasts from afar. These birds are close to extinction in Southern Africa and classified as near threatened on the International Union for Conservation Nature (IUCN) list, with a strong global decline in their numbers.

A viewing hide constructed by honorary rangers in the Golden Gate Highlands National Park, about 30 km from Clarens in the Eastern Free State, offers tourists the opportunity to view and photograph the birds as they feed at one of South Africa’s close to 200 vulture restaurants.

This tourist attraction is situated in a good location from a conservation perspective, with vulture colonies and – importantly – water close by, according to Prof Aliza le Roux.

Prof Le Roux, Associate Professor in the Department of Zoology and Entomology on the Qwaqwa Campus of the University of the Free State (UFS) and affiliated to the Afromontane Research Unit (ARU), is working with one of her students, Agnes Mkotywa, on a study regarding the effectiveness of this feeding site.

Poisoned carcasses big threat to vultures

She said there are quite a few vulture restaurants in the area, with the most famous one at Giants Castle.

A vulture restaurant is an area where park rangers drop non-poisoned carcasses, mostly donated by nearby farmers. Poisoned carcasses, bait for other animals such as jackals and caracals, are one of the biggest threats to vultures.

The vulture restaurants, an effort to get vulture populations to grow, are within the reach of Cape and bearded vultures. But, as found in Mkotywa’s study, the initiative has its shortcomings.

Prof Le Roux said the current structures are open, and black-backed jackals come to feed any time of the day and night. “There is more feeding of the jackals than the intended vultures, and the current structure does not protect the vultures against the jackals,” she said. Jackal activity at the vulture restaurant is significantly higher than elsewhere in the park, as supported by camera traps set up in the park by Dr Mpho Ramoejane, currently an ARU postdoctoral researcher.

Raised platform a possible solution

“This is one of our primary research findings. A possible solution is to put up fences. It will, however, keep everything else out and will be an eyesore from a tourist perspective. A raised platform that could exclude the jackals and still provide the vultures with a large landing place, might work,” Prof Le Roux added.

Another finding was that carcasses are not dropped regularly enough. Vultures cannot predict when there will be food.

These findings will be published in peer-reviewed outlets, but it will also be communicated to the management of the South African National Parks (SANParks) to address the problem. “SANParks is involved in the project and wants the information. They said they needed the information and will build on it,” said Prof Le Roux.

Once the suggested changes are implemented, she is excited to scientifically document how these changes are making a difference. This has the potential to guide the management and development of vulture restaurants elsewhere in South Africa and the world.

News Archive

Death may come in adorable little packages

2015-03-23

The main host of the Lassa virus is the Natal Mulimammate mouse.

Photo: Supplied

Postdoctoral researcher, Abdon Atangana, of the Institute for Groundwater Studies at the university recently published an article online about the Lassa Haemorrhagic fever in the Natural Computing Applications Forum. In addition to the terminal transmissible sickness recognised as Ebola haemorrhagic fever, there is another strain called Lassa haemorrhagic fever.

The disease is classified under the arenaviridae virus family. The first outbreaks of the disease were observed in Nigeria, Liberia, Sierra Leone, and the Central African Republic. However, it was first described in 1969 in the town of Lassa, in Borno State, Nigeria.

The main host of the Lassa virus is the Natal Mulimammate mouse, an animal indigenous to most of Sub-Saharan Africa. The contamination in humans characteristically takes place through exposure to animal excrement through the respiratory or gastrointestinal tracts.

Mouthfuls of air containing tiny particle of infective material are understood to be the most noteworthy way of exposure. It is also possible to acquire the infection through broken skin or mucous membranes that are directly exposed to the infective material.

“The aim of my research was to propose a novel mathematical equation used to describe the spread of the illness amongst pregnant women in West Africa. To achieve this, I used my newly-proposed derivative with fractional order called beta-derivative. Since none of the commonly used integral transform could be used to derive the solution of the proposed model, I proposed a new integral transform called Atangana-Transform, and used it, together with some iterative technique, to derive the solution of the model.

“My numerical simulations show that the disease is as deadly amongst pregnant women as Ebola,” Abdon said.

Abdon’s research was submitted to one of Springer’s top-tier journals with an impact factor 1.78. The paper was accepted and published February 2015.