Length-Weight Relationships and Condition Factor of Oreochromis mossambicus (Peters, 1852) from Manchar Lake Distt. Jamshoro, Sindh, Pakistan

Abstract

Oreochromis mossambicus are among the most widely distributed exotic fishes in the world and mostly used for food. The present study was undertaken to unveil information on the length-weight relationships (LWRs) and condition factor (Kn) of freshwater fish Oreochromis mossambicus (Peters, 1852) from Manchar Lake District Jamshoro, after post super flood in Sindh. Fish were studied by examining 364 specimens (Male 186 and female 78) collected from August 2011 to July 2012. These were 10-26 cm in total length (TL) and 19.8- 295 g in weight. Length-weight relationships calculated were, Log W = -1.8007+3.0556 × Log L (Combined population), Log W = -1.7802+3.0406 × Log L (male population) and Log W = -1.8062 + 3.0577× Log L (female population). The relative condition factor (Kn) for Combined population was 0.87 – 1.07 (Mean 1.0023±0.0671), while for male 0.86 – 1.09 (Mean 1.0027 ± 0.0733) and females 0.87 – 1.07 (Mean 1.0020 ±0.0631). The Length-weight relationships and condition factor indicate isometric and satisfactory growth of Oreochromis mossambicus in Manchar Lake.