Length-weight Relationships and Condition Factor of Oreochromis niloticus (Linnaeus) in Oyan Lake, Southwest Nigeria
Dominic Olaniyi, ODULATE1, Nafisat Bolatito, IKENWEIWE1, Waidi Oyebanjo, ABDUL1 and Somrat Adeola, ABDULSALAMI2
1Department of Aquaculture and Fisheries Management, College of Environmental
Resources Management, Federal University of Agriculture, P. M. B. 2240,
2 Fisheries and Aquaculture Unit, Department of Biological Sciences, College of Natural Sciences,
Crescent University, P.M.B. 2082, Abeokuta, Nigeria.
Accepted on July 15, 2013
Oreochromis niloticus in Oyan Lake, Ogun State, Southwest Nigeria was studied for its total length-weight relationships. Condition factor (k) of the fish was also assessed in the study. The analysis in each instance was done based on sexes and combined. It was revealed that the population of O. niloticus comprised mainly adult fish of length group of 17.5 cm. The analysis of length-weight relationship data depicted ‘b’ value of 2.90 (male), 2.99 (female) and 2.94 for combined sexes. No significant difference (p>0.05) in the ‘b’ values of both sexes. The condition factor of O. niloticus ranged between 1.93 (October) and 2.26 (May) with a mean of 2.09 ± 0.1. Sampled fish were observed to be in better condition in the wet season than dry season. Condition factor was significantly higher (p>0.05) in the wet season than dry season. Oyan Lake provides good aquatic ecological environment for the growth and development of Oreochromis niloticus.