LENGTH-WEIGHT RELATIONSHIP AND CONDITION OF INDIGENOUS CATFISH, RITA RITA (HAMILTON) FROM CEMENTED PONDS UNIVERSITY OF SINDH, JAMSHORO

M. Y. Laghari, N.T. Narejo, H. Mahesar, P.K. Lashari, M. Abid

Abstract


Length-weight relationship and relative condition factor (Kn) was measured of indigenous catfish, Rita rita (Hamilton) collected from the stock maintained in the cemented cisterns at the University of Sindh, Jamshoro, Sindh, Pakistan. A total of 213 (171 male and 42 female) specimens ranging from 139-417mm in length (TL) and 32.7-779.6 g in weight were used for the analyses during June to November 2008. Length-weight relationship is described by the following equations:
Log W= -3.02 + 3.87 log L (for male)
Log W= -0.92 + 2.34 log L (for female) and
Log W= -2.62 + 3.56 log L (for combined sexes)
The relative  condition  factor  (Kn) values were found to be 0.99, 0.81 and 0.94 for male, female and combined sexes respectively. The length-weight relationship  and  relative  condition  factor  (Kn) values  indicated that the male  of R. rita was  found to  be in good condition than that of female from the experimental cemented pond.


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