Inbreeding in Fresh Water Fish Populations Using Transferrins and Esterases as Markers
A species of fresh water fish, Tilapia macrochir was examined for biochemical polymorphism, and transferrin and esterase polymorphism were found. Phenotype frequencies were examined on several occasions from three different regions of a reservoir. No difference in phenotype distribution between areas was found in either system. However, a consistent excess of presumed homozygotes in both the transferrin and esterase systems was obtained, suggesting population structuring. Estimates of the inbreeding coefficient from both systems were consistent and averaged 0.42.
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