In East Africa, the species was introduced in Kenya in 1980 from Botswana (Motiti Pan, Okavango drainage) by I. Parker for aquaculture purposes. It was introduced to a dam near Nairobi and it is possible that some specimens found their way into the Nairobi River system.
Habitat and Ecology
Depth range (m): 10 - 10
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Diseases and Parasites
Life History and Behavior
Molecular Biology and Genetics
Statistics of barcoding coverage: Oreochromis andersonii
Public Records: 0
Specimens with Barcodes: 13
Species With Barcodes: 1
IUCN Red List Assessment
Red List Category
Red List Criteria
At present, the Okavango population is not immediately threatened, but this system is intermittently linked to the Zambezi and thus it is inevitable that O. niloticus will invade the system unless a barrier is constructed across the Selinda Spillway to prevent migration.
O. andersonii is also recorded from the Cunene River, where O. niloticus does not yet occur. The alien species Oreochromis mossambicus (Peters, 1852) is, however, being extensively cultivated in Namibia and may hybridise with O. andersonii if it escapes in to the Cunene.
Establishing refuges in lakes that are not directly connected to the main rivers or to aquaculture establishments may allow small populations to survive. For this reason, and the possibility that the Cunene population may be secure at present, the species is assessed as Vulnerable globally.
Increasing fishing effort and increasingly widespread use of small-meshed fishing nets has depleted stocks in many areas, such as the heavily-populated areas of the Barotse Floodplain on the Upper Zambezi River in Zambia. Floodplain lagoons no longer provide refugia as they are all intensively seine netted.
A commercial gillnet fishery in the Panhandle area of the Okavango Delta also targets this species.
Relevance to Humans and Ecosystems
Oreochromis andersonii, the three spotted tilapia, threespot tilapia or threespot bream, is a species of cichlid native to Africa, where it is found in rivers and swamps in the southern half of the continent. This species reaches a length of 61 cm (24 in). It is important to local commercial fisheries, as well as being commercially farmed. It is also popular as a gamefish.
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