Biological aspects of Oreochromis niloticus (Linnaeus, 1758) in Geray Reservoir (Ethiopia) for effective sustainable fisheries
Biometric evaluation and reproductive biology of Oreochromis niloticus were studied from Geray Reservoir.Between November 2021 and August 2022, 316 O.niloticus specimens were collected from this reservoir.The observed male to female sex ratio was 1:1.14, which was statistically insignificant compared with the hypothetical 1:1 sex ratio (X2 = 1.27,