Icthyofauna of Oramiriukwa River in Imo State, Nigeria

Okorie, P.U. (2005) Icthyofauna of Oramiriukwa River in Imo State, Nigeria. In: 19th Annual Conference of the Fisheries Society of Nigeria (FISON) , 29 Nov - 03 Dec 2004 , Ilorin, Nigeria.

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Abstract

Oramiriukwa one of the rivers in the Imo River drainage basin runs approximately a 14.0km course from its headwaters in Abba Isu (Nwangele LGA) and discharge into Otamiri River. Based on the fish catches of local fishermen using a variety of fishing gear in a sampling station in Emekuku (Owerri LGA), a total of 17 families of fish consisting of 27 species were identified in the river. In the January sample the most numerically abundant species were Tilapia zilli (12.5%). Calamoichthys calabaricus (8.7%) and T. guineensis (8.6%). In the July samples the most numerically abundant species were Mastacemblus loenbergii (9.2%). T. zilli (7.2%) and Hemichromis fasciatus (6.6%). The Shannon Weiner Diversity index for Oranmiriukwa River was high (1.305) implying a relatively diversified and equilibrated fish community

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