This study evaluated the length-weigh and condition factor of five species of fish from Brass River. The fish samples were obtained from the river using different fishing gears. The length-weigh relationship and condition factor were determined using known biometric methods. Results obtained showed that length-weight regression trend of the five fish species exhibited negative allometric growth with length exponent (b) ranging from 0.971 (Polydactylus quadrifilis) to 1.743 (Mugil cephalus) for dry season and 0.661 (Mugil cephalus) to 1.054(Micropoganias undulatus) for wet season. The mean condition factor for dry and wet season of fishes from Brass River was 0.58 and 0.65 respectively (Pomadasys Peroteti), 0.65 and 0.70 respectively (Micropogonias undulates), 0.60 and 0.88 respectively (Mugil cephalus), 0.61 and 0.65 respectively (Polydactylus quadrifilis) and 0.49 and 0.68 respectively (Caranx latus). Hence, seasons affect condition factor of fish from Brass River.


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