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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

Resource Manual on Trafficking in Persons for Judicial Officers sees the light

2012-03-27

Judge Connie Mocumi, President of the South African Chapter of the International Association of Women Judges (SAC-IAWJ), during the launch of the Resource Manual on Trafficking in Persons for Judicial Officers.
Photo: Leonie Bolleurs
27 March 2012

On Human Rights Day the Department of Criminal and Medical Law in the Faculty of Law at the University of the Free State (UFS) hosted the launch of the Resource Manual on Trafficking in Persons for Judicial Officers compiled by the South African Chapter of the International Association of Women Judges (SAC-IAWJ).

The manual, which will be used by members of the South African judiciary, will equip officials in adjudicating the multifaceted crime of human trafficking.

“Presiding officers must be sensitised about the complexity of the crime. Human trafficking has many faces and presents itself in different ways. A person may for example be trafficked for sexual exploitation, forced labour, the removal of body parts, as well as forced marriages. Expert knowledge is needed to handle these cases effectively in court,” said Dr Kruger, also responsible for the human trafficking initiative in the Unit for Children's Rights at the UFS.

Prior to the launch, a total number of 300 judicial officers, including six judges from the Southern African Development Community (SADC) received training on human trafficking. After receiving this training, the officers were sensitised to scrutinise domestic violence cases as well as inter-country adoption cases in order to identify possible human trafficking activities.

As keynote speaker at the launch, Dr Beatri Kruger from the Department of Criminal and Medical Law at the UFS, said that human traffickers were running operations like a well-oiled machine. They have abundant and sophisticated resources and often bribe corrupt officials to further their criminal activities. In South Africa, people combating human trafficking struggle with a lack of resources as well as comprehensive legislation. Most cases are prosecuted under the Children’s Act and the Sexual Offences Amendment Act of 2007. Unfortunately, this legislation still leaves a gap in the prosecuting of perpetrators. Only trafficking cases where where children are trafficked can be prosecuted under the Children’s Act. In terms of the Sexual Offences Amendment Act perpetrators can be prosecuted for trafficking persons for sexual exploitation only, and not for labour of other forms of trafficking. Therefore the comprehensive Prevention and Combating of Trafficking in Persons Bill 2010 needs to be finalised to cover all forms of trafficking.

There are more slaves today than at any time in the history of humankind. “To combat this serious problem, we need to follow a holistic approach,” said Dr Kruger. This includes prevention (raising awareness), effective prosecution and suitable punishment, the protection of victims, and partnering with all relevant stakeholders, including people in the communities. Community members are often whistle blowers of this crime.

The President of the SAC-IAWJ, Judge Connie Mocumi, handed copies of the manual, a three-year project, to judicial officers present at the launch. The manual covers, among others, the definition of trafficking in persons, trafficking in persons in South Africa and the Southern African region, a legislative framework, victims’ rights and criminal proceedings.

“It is critical that judicial officers appreciate the phenomenon of trafficking in persons in its broader socio-economic context. Therein lays the ability to deal competently with the often-nuanced manifestation of this scourge. The incapacity to recognise these nuances can deny victims access to justice. In that regard, the manual, amongst others, is to become an important empowering adjudication tool for judicial officers,” said Judge Mocumi.

More copies will be printed and be ready for distribution by the beginning of May this year.

Judge Belinda van Heerden, who also attended the launch, said: “There is progress on the judicial and legislative front to bring wrongdoers to book. This manual will go a long way in giving judicial officers insight into the problem.”

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