Abstract
Biology of Parauchnoglanis altipinnis (Boulenger, 1911) including length-weight relationship, condition factor, sex ratio and the fecundity were studied. Fishing methods employed for the collection of the 240 specimens used were gillnetting and cast netting. The total lengths ranged from 12.8 to 18.5 cm and the body weights ranged from 28.0 to 75.9 g. The predictive equation was log W = -1.15 + 2.35 Log L indicating negative allometric growth of the fishes in Ogbese river. The mean condition factor obtained was 1.18. Male to female ratio of 1:1.07 was established. Fecundity estimates ranged from 492 to 6397 eggs with lengths 14.5 cm to 17.6 cm per female fish respectively, and had a direct relationship with increase in fish size. The mean gonadosomatic index (GSI) for male was 0.52% and female was 14.15%. Highfin spotted catfish is one of the cherished food fish for poor people in Nigeria hence, its study is important and essential. This baseline data on aspects of the biology of P. altipinnis will contribute to the studies on the indigenous fish species in Nigeria.
Published Version
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