Item Details

Title: The Trophic Structure and Diversity of Haplochromines among the Kyoga Minor Lakes

Date Published: 2000
Author/s: Mbabazi Dismas
Data publication:
Funding Agency :
Copyright/patents/trade marks:
Journal Publisher:
Affiliation: Fisheries Research Institute,
P.o. Box


Before the introduction and establishment of the Nile perch, Lates nilolicus (L). Lakes Victoria
and Kyoga had a diverse fish fauna, dominated by haplochromine cichlids. The haplochromines
had evolved into many trophic groups which occupied virtually all trophic levels and contributed
to the ecological efficiency of the lakes. Establishment of Nile perch in the main lakes was
followed by a decline and in some cases complete disappearance of many haplochromine trophic
groups. This is thought to have affected the efficiency of the ecosystem. This study examined the
species composition and trophic diversity among haplochromines in Kyoga Minor lakes where
Nile perch was not introduced and compared this with historical data from lakes Victoria.
Six Kyoga Minor lakes and the main Lake Kyoga (Iyingo) were sampled. Forty one
haplochromine species were recorded in the Kyoga lake basin and only fourteen species were
recorded from the main Lake Kyoga. Species and trophic diversity of haplochromines were highest in the Kyoga Minor lakes as compared to Lake Kyoga.