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Journal of Fisheries International
Year: 2013  |  Volume: 8  |  Issue: 3  |  Page No.: 85 - 89

Population Structure, Reproduction, Age, Virtual Population Analysis (VPA) of Parailia pellucida Boulenger, 1901 (Osteichthyes: Schilbeidae) in a Tropical River System

B.I. Uneke    

Abstract: Population structure, reproduction, age, Virtual Population Analysis (VPA) of Parailia pellucida was studied with samples collected from commercial artisinal fishers for 13 consecutive months. The length-frequency distribution of the 1722 P. pellucida showed that the smallest and largest specimens were 3.8 and 10.2 cm TL, respectively (mean = 6.11cm±0.81) with 1 mode at 5-6 cm TL. The weight ranged between 0.3-7.5 g (mean = 1.4 g±1.04). In the whole 13 months, there was significant heterogeneity (X2 = 21.09, df = 12, p<0.05) with females dominating. Estimated values of length and age at sexual maturity Lm and tm were 6.3 cm TL and 1.39 year-1, respectively. The sizes attained by the P. pellucida are 3.73, 5.47, 7.62, 8.75 and 9.34 cm at the end of 3, 6, 12, 18 and 24 months of age, respectively. Estimated values for age at length zero (to), length at age zero (Lo) and potential species longetivity (tmax)were -0.29 year, 1.81 cm TL and 4.76 years.

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