Electrophoretically detectable genetic data for fifteen southern African cichlids

" Gene products of 40 loci in 15 species of the cichlid genera Chetia, Hemichromis, Oreochromis, Pharynogochromis, Serranochromis and Tilapia were examined by horizontal starch-gel and vertical polyacrylamide-gel electrophoresis. Electrophoretic analysis of the loci, using aqueous extracts of brain, eye, gill, heart, kidney, liver, serum, stomach muscle, testis and white muscle, revealed the products of 40 loci for routine analysis. Genetic variation within species was observed at 18 loci and average heterozygosities ranged between 0.021 and 0.047 which is less than previous estimates based on fewer loci and smaller sample sizes for the same species. Interspecific variation exists and can be used to identify the species studied. Gene expression is similar among all species studied "