Length-weight relationship and reproduction of fishes in Gilgel Abay, Andassa, Jemma and Koga Rivers, Blue Nile, Amhara region, Ethiopia

Abstract

Length-weight relationship, frequency distribution and reproduction of fishes in Gilgel Abay, Andassa, Jemma and Koga Rivers were studied by using gillnets and monofilaments of different mesh sizes, cast nets, hook and lines. Fish species identification was done by using literature and specimen deposited in the laboratory. Totally, 1106 fish specimens were collected from four Rivers. Three families and thirteen species of fishes were identified four Rivers. Labeobarbus intermedius, Varicorhinus beso, L. nedgia and Clarias gariepinus were the most dominant fish species found in both rivers. Length-weight relationship of L. intermedius, V. beso, L. nedgia and C. gariepinus were curvilinear and statically significant (p