Abstract
The length-weight, length-length relationship and condition factor of Synodontis robbianus in the lower Niger River (Idah), Nigeria was carried out. One hundred and fourteen (114) fish samples of tota l length ranging from 8.8-16.0 cm and weight between 4.3 g and 43.4 g collected between January and August, 2008 were analyzed. Results showed allometric growth for the sampled fish with regression coefficient (b-value) of 2.9926, 2.7620 and 2.8355 for males, females and combined sex respectively. The regression coefficient (b-value) for the length-length relationship was 0.9418, 0.9602 and 0.9510 for males, females and combined sex while the condition factor of all the sampled population varied from 1.57-3.83. The Idah area of River Niger in Kogi State is a good environment for growth, reproduction and survival of the fish species.
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