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02 August 2022 | Story Leonie Bolleurs | Photo Leonie Bolleurs
Alistair Naidoo, second-year master’s student in Conservation Genetics and full-time technician in the Department of Genetics; Prof Paul Grobler, Head of the Department of Genetics; Prof Gordon Luikart; and Hannah Janse van Vuuren, third-year master’s student in Conservation Genetics.

It is an important and exciting time to be doing research in conservation genetics. This is according to Prof Gordon Luikart, Professor of Conservation Ecology and Genetics at the Flathead Lake Bio Station at the University of Montana in the United States. 

Prof Luikart, whose primary research focus is the application of genetics to the conservation of natural and managed populations, recently delivered a lecture, The Expanding Role of Genetics/omics in Wildlife Research and Conservation, on the Bloemfontein Campus of the University of the Free State (UFS). The lecture, hosted by the Department of Genetics, was attended by a group of students and lecturers in conservation and a number of related fields. 

He is one of the leading scientists in the field of conservation genetics, including integration of genomics in conservation projects. He is also co-author of the textbook Conservation and the Genomics of populations – the current prescribed textbook for GENE3744.

Species threatened with extinction

In 2008, the International Union for Conservation of Nature (IUCN) stated that approximately 10-20% of all vertebrate and plant species are threatened with extinction over the next few decades. In 1984, American biologist Edward O Wilson also said that it will take millions of years to correct the ongoing loss of genetics and species diversity caused by the destruction of natural habitats. “This is the folly our descendants are least likely to forgive us.”

Prof Luikart is of the opinion that genetics has enormous potential to help manage wildlife and prevent extirpation. “My research works to realise this potential and help wildlife managers conserve populations and ecosystems,” he says. 

Conservation managers and biologists have understood the risks of inbreeding for more than 100 years. In his lecture, one of the aspects of genetic conservation he focused on, was the negative effects of inbreeding and how this can be reversed using genetic rescue. 

With the genetic rescue study, they found that the gene flow into recently isolated populations can increase individual fitness and population growth. He proposed that conservation managers should consider genetic principles and rescue as practical and important tools. 

Prof Luikart also provided a list of information that can be retrieved from molecular genetic data to help conservation managers. This includes intel on census and effective population size, gene flow and dispersal, local adaptation and selection, forensics, genetic identification and law enforcement, and disease ecology and transmission. 

Non-invasive genetic monitoring

In terms of detecting gene flow, he focused on a study about non-invasive genetic monitoring that was conducted in the Yellowstone Park. Prof Luikart and a group of students collected the shed hair and faeces of the grizzly bear, obtained from trees and hair traps, which were used as a source of DNA. 

They established, for instance, that inbreeding depression is more common and stronger than previously thought in natural populations. Genetic monitoring, using non-invasive methods as described, has been found to be an effective tool that conservation managers should consider for detecting inbreeding and loss of genome-wide variation.

His research on the bighorn sheep, the alpine ibex, and the black bear informed most of the findings he discussed during his lecture.

News Archive

UFS lecturer overcomes barriers to become world-class researcher
2016-09-05

Description: Dr Magteld Smith researcher and deaf awareness activist Tags: Dr Magteld Smith researcher and deaf awareness activist

Dr Magteld Smith researcher and deaf awareness
activist, from the Department of Otorhinolaryngology
at the UFS.
Photo: Nonsindiso Qwabe

Renowned author and disability activist Helen Keller once said the problems that come with being deaf are deeper and more far-reaching than any other physical disability, as it means the loss of the human body’s most vital organ, sound.

Dr Magteld Smith, researcher at the Department of Otorhinolaryngology (Ear, Nose and Throat) at the University of the Free State, said hearing loss of any degree can have psychological and sociological implications which may impair the day-to-day functioning of an individual, as well as preventing the person from reaching full potential. That is why Smith is making it her mission to bring about change in the stigmatisation surrounding deafness.

Beating the odds
Smith was born with bilateral (both ears) severe hearing loss, which escalated to profound deafness. But she has never allowed it to hinder her quality of life. She matriculated from a school for the deaf in 1985. In 2008 she received a cochlear implant   a device that replaces the functioning of the damaged inner ear by providing a sense of sound to the deaf person   which she believes transformed her life. Today, she is the first deaf South African to possess two masters degrees and a PhD.

She is able to communicate using spoken language in combination with her cochlear implant, lip-reading and facial expressions. She is also the first and only deaf person in the world to have beaten the odds to become an expert researcher in various fields of deafness and hearing loss, working in an Otorhinolaryngology department.

Advocating for a greater quality of life
An advocate for persons with deafness, Smith conducted research together with other experts around the world which illustrated that cochlear implantation and deaf education were cost-effective in Sub-Saharan Africa. The cost-effectiveness of paediatric cochlear implantation has been well-established in developed countries; but is unknown in low resource settings.

However, with severe-to-profound hearing loss five times higher in low and middle-income countries, the research emphasises the need for the development of cost-effective management strategies in these settings.

This research is one of a kind in that it states the quality of life and academic achievements people born with deafness have when they use spoken language and sign language as a mode of communication is far greater than those who only use sign language without any lip-reading.

Deafness is not the end

What drives Smith is the knowledge that deaf culture is broad and wide. People with disabilities have their own talents and skills. All they need is the support to steer them in the right direction. She believes that with the technological advancements that have been made in the world, deaf people also have what it takes to be self-sufficient world-changers and make a lasting contribution to humanity.

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