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Introgressive hybridization of tilapias in Zimbabwe
Author(s) -
Gregg R. E.,
Howard J. H.,
Snhonhiwa F.
Publication year - 1998
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1998.tb01547.x
Subject(s) - biology , sympatry , oreochromis mossambicus , introgression , sympatric speciation , tilapia , zoology , fish <actinopterygii> , fishery , genetics , gene
Three species of tilapia native to Zimbabwe, Oreochromis mossambicus, O. mortimeri and O. macrochir are not naturally sympatric, but because of transplantation they have been brought into sympatry. Allozymes of fish examined from Lakes Kariba, Kyle and Chivero showed evidence of introgressive hybridization. The data showed non‐random mating populations in Lakes Kariba and Kyle. All three reservoirs displayed individuals with intermediate principal component scores and hybrid index scores indicating hybridization.