Catch statistics, biological attributes and marketing of tiger fish, threespot tilapia and redbreast tilapia

Abstract

Catch statistics indicate that the relative abundance of fish in Caprivi is high for Oreochromis andersonni, followed by Tilapia rendalli and was least for Hydrocynus vittatus. The length-weight relationships showed great differences among species and localities in a and b values in the equation W = a Lb or y = a + bx. The b value is used to predict weight from length of the species. Species with high b value have large weight for average length, which may be due to better habitat conditions. Marketing analysis showed a linear relationship between price and size. In general, Tilapia rendalli was the mostly highly priced, followed by Oreochromis andersonni and Hydrocynus vittatus. Big fish with regardless their species type is sold at better price at the market