Abstract
Some aspects of growth and reproductive biology of Hepsetus odoe, a commercial fish species from Lake Eleiyele, were investigated from October 2010 to April 2011 to enhance effective management and sustainable exploitation. The pattern of growth was determined from the length-weight relationship (LWR) and the condition factor (K). The reproductive features studied included fecundity, the gonadosomatic index (I G) and egg diameter. A significant relationship was found to exist (p < 0.05) between the body weight and the total length (L T) of fish. The exponential parameter b of LWR was 1.88. The mean K was 0.77 and the minimum mean K value (0.28) was recorded in the largest specimens. A significant difference in the condition factor was recorded between sexes and between size groups (p < 0.05). Fecundity ranged between 556 (for specimens with L T 22.9 cm; total weight (W T) 97.7g) and 2350 (for specimens with L T 36.9 cm; W T 266.9 g) eggs with the mean of 1469 eggs. The overall mean I G was 1.12% with fema...
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