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Students hear from textbook writer about conservation genetics

02 August 2022 | Story Leonie Bolleurs | Photo Leonie Bolleurs

Genetics lecture — 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

PhD students’ voices reverberate across Africa and beyond

2014-01-14

Noel Ndumeya, Tinashe Nyamunda, Ivo Mhike and Anusa Daimon
Photo: Hannes Pieterse

The Centre of Africa Studies (CAS) has been recruiting the best young scholars from across the SADC region – with magnificent success. In the span of six months, four PhD students have excelled both on the African continent and abroad.

Anusa Daimon, Noel Ndumeya, Ivo Mhike and Tinashe Nyamunda – the names of these distinguished students. Set against the backdrop of global excellence and competition, they have been awarded several positions at conferences and already published world-wide.

Anusa Daimon’s PhD studies at the CAS focuses on Malawian migrants and their descendants in Southern Africa. It explores issues of identity construction and agency among this group.

Since his arrival at the CAS, Daimon has won two fully-funded awards to attend international conferences and workshops. He was invited to attend the Young African Scholars Conference at Cambridge University in the UK. He also went to Brazil to the IGK Work and Human Lifecycle in Global History Summer Academy. This workshop explored the historical and modern meanings and practices of work in terms of ‘freedom’ and ‘unfreedom’.

Noel Ndumeya holds a special interest in environmental history and the aspects of conservation and conflict. His PhD hones in on land and agrarian studies with specific focus on South Eastern Zimbabwe.

Ndumeya has won an award from the African Studies Association United Kingdom (ASAUK). This earned him an invitation to Nairobi, Kenya, to work with an editor from the Journal of Southern Africa Studies (JSAS).

Ivo Mhike’s research specialises in youth culture and their relationship with the state. In his PhD he uses juvenile delinquency as a window towards an analysis of social constructs of youth behaviour. This includes youth policy and their institutional and administrative links to the state.

Mhike has been invited to attend the CODESRIA Child and Youth Institute in Dakar, Senegal, with the theme: Social Protection and the Citizen Rights of Vulnerable Children in Africa.

Tinashe Nyamunda specialises in African Economic History. His PhD thesis is entitled, “The State and Finance in Rhodesia: A study of the evolution of the monetary system during the Unilateral Declaration of Independence (UDI), 1965–1979”.

Under the direction of his primary supervisor, Prof Ian Phimister and his secondary supervisor, Dr Andrew Cohen, four of his papers have been accepted for publication. Nyamunda also received sponsorship from the Rector’s Office for an edited book collection of which he is the leading author. The book focuses on the many aspects of Zimbabwe’s blood diamonds.

Recently, Nyamunda has contributed papers at conferences in Botswana and Scotland and attended a workshop at Lund University in Sweden. He has also received an invitation from Germany and Oxford to present some chapters of his PhD thesis.

“The centre has provided the best working environment any PhD student can dream of,” Nyamunda said. He continued to remark that the opportunities Prof Jonathan Jansen has created opened up immense possibilities for them.

“Given these fruitful experiences in just a year at the university,” Nyamunda said,” imagine what can be accomplished given the resources and environment availed by the institution.” The prospects after his PhD studies looks bright, he concluded, because of the opportunities provided by the UFS.

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