期刊
AFRICAN JOURNAL OF AQUATIC SCIENCE
卷 42, 期 4, 页码 309-323出版社
TAYLOR & FRANCIS LTD
DOI: 10.2989/16085914.2017.1405788
关键词
Africa; alien species; aquaculture; Cambaridae; management; modelling; pathways; Parastacidae
资金
- National Research Foundation [109015, 110507, 103602]
- South African National Department of Environment Affairs through the South African National Biodiversity Institute Invasive Species Programme
Freshwater crayfish invasions have been studied around the world, but less so in Africa, a continent devoid of native freshwater crayfish. The present study reviews historical and current information on alien freshwater crayfish species introduced into South Africa and aims to indicate which areas are at risk from invasion. As is the case elsewhere, South Africans have shown a keen interest in both farming and keeping freshwater crayfish as pets, which has resulted in Cherax cainii, Cherax destructor, Cherax quadricarinatus and Procambarus clarkii being introduced to the country. There is evidence of successful establishment in the wild for C. quadricarinatus and P. clarkii in different parts of the country. Species distribution models suggest that the eastern part of the country and parts of the Eastern and Western Cape are at higher risk of invasion. At present, illegal translocations represent the most likely pathway of crayfish spread in South Africa. A continued risk of invasion by freshwater crayfish species in South Africa is highlighted, which reinforces the need for more research, as well as for strong mitigation measures, such as stronger policing of existing regulations, management or eradication where feasible and public education.
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