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34 Uneke Bilikis Iyabo: Condition Factor of Tilapia Species in Ebonyi River, Southeastern Nigeria 2. Materials and Methods 2.1. Study Area This study was conducted in Ebonyi River, a tropical river Izzi Local Government Area, Ebonyi state, Southeastern Nigeria (Fig. 1). The vegetation of the river comparies mainly tall trees, bamboo plants, palm trees and elephant grasses. The bottom of the river is of fine sand and the surface is colonized randomly by water weeds which form protective covers for the water organisms. The river is subjected to the annual flooding from April to October (rainy season) during which most of the area is flooded. During the flood, when the level of water becomes increasingly high, active farming becomes increasingly intensified. However, towards the end of the flooding regime, the above cycle alternates with the resumption of fishing activities which get to the peak during the dry season. 2.2. Sample and Data Collection A total number of 320 fresh Tilapia fishes with standard length ranging from 6cm to 10cm were purchased from Ebonyi River fish landing site. The fishes were serially numbered the total length (TL) was taken from the tip of the head to the tip of the tail respectively using a meter rule calibrated in centimeter. Their corresponding body weights were also measured with table top weight balances to the nearest gram. Specimens were stored in coolers containing ice and were transported to the laboratory of the department of Applied Biology, Ebonyi State University, Abakaliki, Nigeria for further analysis. 2.3. Data Analysis The mean length and weights of the classes were used for data analysis the condition factor (K) of the experimental fish was estimated from the relationship. K=100W/L³ Where K-Condition factor W=Total weight (g) of fish L=Total length (cm) of fish 625N 8.00E 615N 8 00E Idembia Isieke Umuaghara Okposi Onu Achi Mgbabor Agharauga Ngele Okoro R lyiokwu R Atang Ogbaga Aghameghú Abia R Isiachi R ABAKALIKI Ebonyi Achi R 8 10E 6 25N Nkpunia W Ewe R. Amachi Adaka R Agbaja Ochacha Nkwagu SCALE 1:100 000 Fig 1. Map of Ebonyi river showing study area. S Legend River Study Area 615N 8 10E

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