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Protein variation in Schilbe mystus (L.) and Eutropius niloticus (Ruppel) (Pisces siluriformes) in the Volta Basin of Ghana, West Africa
Author(s) -
ABBAN E. K.,
SKIBINSKI D.O.F.
Publication year - 1988
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.1988.tb00330.x
Subject(s) - biology , loss of heterozygosity , structural basin , drainage basin , genetic variation , zoology , ecology , fishery , gene , allele , genetics , geography , paleontology , cartography
Schilbe mystus (L.) and Eutropius niloticus (Ruppel) (fm. Schilbeidae) from rivers of the Volta Basin were screened at 18 enzyme loci for electrophoretically detectable variation. The mean observed heterozygosity was 0.001 in S. mystus and 0.018 in E. niloticus . The possible causes of these rather low levels of genetic variation are considered in relation to natural and human influences in the Volta Basin river system. The results also suggest that the species S. mystus consists of several distinct biological species and that E. niloticus may have evolved from within the Schilbe group.