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.

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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Read more about the article Natural vegetation increases macadamia pest control by bats
Sina Weier looking at a small Vespertilionidae, also commonly known as “evening bats” or “vesper bats”, on an Angola expedition. (Photo credit: Kostadin Luchansky)

Natural vegetation increases macadamia pest control by bats

As recently published in the journal Biological Conservation, natural vegetation is the most important factor increasing the activity of insect-eating bat species on macadamia orchards.

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Read more about the article The dominance-diversity relationship in ants
Plot showing the relationship between species richness and the abundance of dominant ants. The red line shows the decline in local species richness when invasive dominants are present, the orange line shows the pattern when only native dominants are present.

The dominance-diversity relationship in ants

A recent study by a team of international researchers, including former C·I·B post-doctoral associate, Tom Bishop, has shown that invasive dominant ant species have different effects on the diversity of the wider ant community than native dominant species.

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Read more about the article Impacts of snails and slugs as alien species
The African giant land snail (Achatina fulica) is one of the most devastating snails globally as it has decimated native snails on islands. It has not been reported as alien in South Africa to this date, but it is common in the pet trade. (Photo credit: By Thomas Brown [CC BY 2.0 (https://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons)]

Impacts of snails and slugs as alien species

Even though snails and slugs (gastropods) are some well-known agricultural pests, environmental systems are more vulnerable to alien gastropod impacts. A recent study by C·I·B Hons student, David Kesner and C·I·B Core Team Member, Dr Sabrina Kumschick, at Stellenbosch University on this topic was published in the journal Ecology and Evolution.

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Read more about the article A “City of Choice” for urban feral cats?
A female feral cat fitted with a GPS tracking collar to monitor its movements at the Pietermaritzburg Airport. (Photo credit: Kerushka Pillay)

A “City of Choice” for urban feral cats?

A recent study by C·I·B masters student, Kerushka Pillay, at the University of KwaZulu-Natal, revealed that home range, habitat use and movement of urban feral cats, Felis catus, were generally centred around supplemental resources such as food, in the town of Pietermaritzburg, also referred to as the “City of Choice”.

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