invasive

Read more about the article Scientists tackle one of Africa’s most destructive invasive trees
Undernourished cattle in a rangeland invaded by Prosopis juliflora in Kenya. Note the total absence of grasses and other herbaceous plants. Photo credit: Urs Schaffner
2025 / News

Scientists tackle one of Africa’s most destructive invasive trees

The Ecology and Management of Invasive Prosopis Trees in Eastern Africa

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20 January 2025
Read more about the article Sleeping with the enemy: freshwater invaders hybridising in South African waters
Schematic illustrating the hybridization between smallmouth and largemouth bass in the invaded Olifants River system. Viable F1 hybrids are produced when smallmouth bass provide the sperm and largemouth bass provide the eggs. These F1 hybrids, in turn, can mate, with either parental species, resulting in a backcross – a hybrid that morphologically (size, shape, and structure of an organism or one of its parts) looks like the parent species, but who’s DNA has “pieces” of the other species incorporated. Alternatively, two F1 hybrids could reproduce, resulting in F2 hybrids.
2018 / News

Sleeping with the enemy: freshwater invaders hybridising in South African waters

A recent study published in the Journal of Fish Biology showed that not only is introgressive hybridisation between two notorious freshwater fish invaders possible, but continues to occur within an invaded South African river system.

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21 August 2018
Read more about the article Genetic diversity through space and time: Insights from the invasive smallmouth bass
The study organism, Smallmouth bass (Micropterus dolomieu) (Photo credit: Genevieve Diedericks)
2018 / Highlighted papers

Genetic diversity through space and time: Insights from the invasive smallmouth bass

Genetic diversity has long been considered a cornerstone of biological invasions. It is generally assumed that populations of an invasive alien species will have lower genetic diversity in the new invaded area when compared to populations in the native range.

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7 June 2018
Read more about the article Review on catfish invasions in Brazil and South Africa highlights the need for impact studies
C·I·B core team member Olaf Weyl holding an African sharptooth catfish (Clarias gariepinus). African sharptooth catfish is a large predator, reaching up to 1.7 meters in length and weights of 60kg. (Photo credit: Olaf Weyl)
2016 / News

Review on catfish invasions in Brazil and South Africa highlights the need for impact studies

A recent review paper on the African sharptooth catfish (Clarias gariepinus) has highlighted the urgent need for impact studies.

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1 July 2016
Read more about the article Why do some frogs eat other frogs?
Photo by Les Minter shows a juvenile African bullfrog eating another (less fortunate) individual.
2015 / News

Why do some frogs eat other frogs?

Normally, frogs eat small invertebrates that easily fit into their mouths, but studies of stomach contents have shown that they sometimes eat eggs, tadpoles and even adults of other frogs. What are the conditions under which frogs eat frogs?

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5 October 2015