Read more about the article Introduced porcelain crab invades Saldanha Bay
The invasive Porcelain crab (Porcellana Africana) in Saldanha Bay. (Photograph by GM Branch)

Introduced porcelain crab invades Saldanha Bay

Most Porcelain crabs are tropical, so Prof George Branch was surprised to find a species he has never seen before under boulders in the cold waters of Saldanha Bay, a site he has sampled regularly over several decades.

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Read more about the article Temperature influence impacts of invasive fish in Cape Fold Ecoregion’s rivers
a) Thermal patchiness among deep and shallow habitats on upper Berg River, b) a dead trout at a site on the Amandel River – presumably a result of thermal stress or low dissolved oxygen, c) isolated pools on the upper Amandel River during mid-summer 2017 – surface flow mostly disappeared, and d) a site on the Amandel River dried up in March 2017, leaving the temperature logger exposed to air (Photo credit: Jeremy Shelton)

Temperature influence impacts of invasive fish in Cape Fold Ecoregion’s rivers

A new study, led by C·I·B post-doctoral fellow Jeremy Shelton, has shown that water temperature plays a role in the impacts that an introduced fish has on native fishes.

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Impacts of feral mammals assessed using three frameworks

Feral mammals impact the recipient environments in various and often devastating ways. The finding was the result of a study by former C·I·B Hons student Bianca Hagen and C·I·B core team member Dr Sabrina Kumschick at Stellenbosch University. The study, which was published in NeoBiota, classified impacts using three scoring schemes.

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Read more about the article Hybridisation, Competition and Predation: threats to one species of Xenopus from another
The small Cape platanna, Xenopus gilli, is Endangered in its small range in the Western Cape (Photo credit: John Measey)

Hybridisation, Competition and Predation: threats to one species of Xenopus from another

The most recent assessment suggests that the Cape platanna is Endangered, but that instead the decline being fuelled by habitat loss, it is now the threat from hybridisation, competition and predation by the African clawed frog.

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Read more about the article Reducing the number of invasive species introduced through shipping
The authors found that more alien species with the potential to establish are likely to be introduced to Durban than to other South African ports. One such a species that is not yet in South Africa that could be introduced to Durban through high risk shipping routes, is the disease vector, the southern house mosquito (Culex quinquefasciatus). (Photo credit: http://www.cabi.org/isc/datasheet/86848, Public Domain/released by CDC (Centers for Disease Control and Prevention) - Original photograph by James Gathany)

Reducing the number of invasive species introduced through shipping

Research conducted by C·I·B post-doctoral fellow Katelyn Faulkner demonstrates that to reduce invasions, ships travelling along high risk routes should be targeted for inspections.

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