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International Introductions of
Oreochromis niloticus Introductions as compiled by FAO |
| Main Ref: | Welcomme, R.L. 1988 | ||||
| To: | Tanzania | ||||
| FAO area: | Africa-Inland Waters | ||||
| From: | Unknown | ||||
| FAO area: | |||||
| Year: | |||||
| Range: | 1950 - 1969 | ||||
| Period: | 1950-1974 | ||||
| Established in the wild: | established, natural reproduction | ||||
| Established in aquaculture: | - widely used | natural reproduction | |||
| Significant ecological interactions: | some - adverse | ||||
| Significant socio-economic effects: | some - beneficial | ||||
| Introduced by: | |||||
| Reason: | fisheries | ||||
| Other reason: | |||||
| Comments: | Introduced in the 1950s to the 1960s. Introduced in Lake Victoria to supplement stocks of native tilapiines which declined due to overfishing (Ref. 7270). Has spread in Lake Victoria where it has hybridized with endemic O. esculentus and O. variabilis which led to their disappearance. However, commercial catches increased from 64,000 t in 1982 to 89,000 t in 1985 following establishment of the introduced O. niloticus. Also Ref. 13046. Ref: Ogutu-Ohwayo, R. and R.E. Hecky, 1991 | ||||
| Update record Fish Introductions Table | |||||