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International Journal of Biological Sciences and Applications 2015; 2(4): 33-36 Published online July 30, 2015 (http://www.aascit.org/journal/ijbsa) ISSN: 2375-3811 International Journal of Biological Sciences and Applications Keywords Length-Weight Relationship, Condition Factor, Tilapia Zilli, O. Niloticus, O. Mossabicus, O. Aureus, Ebonyi River Received: May 31, 2015 Revised: June 8, 2015 Accepted: June 9, 2015 American Association for AASCIT Science and Technology Condition Factor of Tilapia Species in Ebonyi River, Southeastern Nigeria Uneke Bilikis Iyabo Dept. of Applied Biology, Faculty of Biological Sciences, Ebonyi State University, Abakaliki, Ebonyi State, Nigeria Email address [email protected] Citation Uneke Bilikis Iyabo. Condition Factor of Tilapia Species in Ebonyi River, Southeastern Nigeria. International Journal of Biological Sciences and Applications. Vol. 2, No. 4, 2015, pp. 33-36. Abstract Study on the condition factor for four species of Tilapia, Tilapia zilli, Oreochromis niloticus, Oreochromis mossabicus and Oreochromis aureus from Ebonyi River was conducted between (January-June, 2011) using mathematical and statistical analysis. Overall mean condition factor (K) value for T. zilli was 2.1. The highest K and lowest K values were 5.0 and 0.2 respectively. Overall mean K value for O. niloticus was 1.9 with highest and lowest K values as 4.5 and 0.2 respectively. Overall mean K value of O. aureus was 2.0. Highest K value was 4.8 while lowest K value obtained was 0.8. Overall mean K value for O. mossabicus was 1.9. Highest K value was 4.6 while lowest K value obtained was 0.5. The mean K values recorded for males from the four species were higher than the females indicating that males were in a better state of wellbeing than the females. From the result, the general observation of the condition of the fishes was the sampled fishes were in good condition and sustainable management should not be neglected. 1. Introduction Tilapia is both a genus of fishes in the cichlid family and the common name for nearly up to 100 species of freshwater and some brackish water cichlid fishes belonging to the three genera (Chapman, 1992). Tilapia cichlid inhabits the fresh water and brackish waters of much of Africa and Middle East. True tilapias however are native only to African and Middle Middle East. Tilapias are fish that are surrounded by fascinating facts (Baker, 1998). They have played an important role in the past and continue to play an important role these days in increasing food supply at affordable prices (Baker, 1998). Tilapia inhabits a variety of fresh and less commonly brackish water habitats, from shallow streams and ponds through the rivers, lakes and estuaries. Tilapias are hardy species produced by several culture methods under a wide range of environmental condition (Getahun, 2003). Tilapias are known to be produced in many countries, but most production is made in tropical and subtropical region in developing countries. Tilapias are also important in local and export markets as well as food fish by rural farmers (Appler, 1985). Historically, they have been of major importance in artisan fishing in Africa and the relevant and are of increasing importance in aquaculture. Tilapia can become problematic invasive species in new warm water habitat, whether deliberately or accidentally introduced. Tilapia is the fifth most important fish in fish farming, with production reaching 1505, 804 metric tonnes in 2000. This is because of their large size rapid growth and palatability (Chapman, 1992). Therefore this study seeks to provide information on the condition factor of four Tilapia fishes for sustainable management of this cichlid fishery.

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