Benthic Fish Fauna and Physicochemical Parameters of Otamiri River, Imo State, Nigeria
Obiyor Kelvin Ikenna, Nwani Chris Didigwu*, Odo Gregory Ejikeme, Madu Josephine Chinenye, Ndudim Doris Ulumma Aguzie and Ifeanyi Oscar Ndimkaoha
Department of Zoology and Environmental Biology, University of Nigeria, Nsukka, Enugu State, Nigeria
- *Corresponding Author:
- Nwani Chris Didigwu
Department of Zoology and Environmental Biology
University of Nigeria, Nsukka, Enugu State, Nigeria
E-mail: [email protected]
Received date: March 14, 2017; Accepted date: April 27, 2017; Published date: May 08, 2017
Citation: Ikenna OK, Didigwu NC, Ejikeme OG, Chinenye MJ, Aguzie NDU, et al. (2017) Benthic Fish Fauna and Physicochemical Parameters of Otamiri River, Imo State, Nigeria. Fish Aqua J 8:199. doi: 10.4172/2150-3508.1000199
Copyright: © 2017 Ikenna OK, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
The study on the fish fauna and physicochemical characteristics of Otamiri River was carried out for six months (June to August and October to December 2015). Samples were collected monthly from three sampling stations along the river. Eckman grab, scoop net, line and hook, cast net, traps and dugout canoe were used to collect the fish samples. Samples were collected from three stations, station 1 (dumpsite in the river), station 2 (dredging section) and station 3 (vegetable farming section). A total of 129 fishes belonging to 5 species, Synodontis budgetti, S. soloni, Chrysicthys nigrodigitatus, Clarias gariepinus and Papyrocranus afer were collected. Station 3 had the highest species composition (n=4) and fish abundance, 108 (83.7%), while station 1 had the least species composition (n=2) and the least fish abundance, 10 (7.8%). Temperature variation from June to December was wide at station 1 (25-28ºC), unlike station 2 (27-28ºC) and station 3 (28-29ºC). A similar trend was replicated by Dissolved Oxygen (DO). Significant correlation of S. budgetti abundance and temperature (r=0.696, p<0.05), depth of river (r=-0.615, p<0.01) and turbidity (r=0.595, p<0.01) was observed. Similarly, a significant correlation of C. nigrodigitatus abundance and temperature (r=0.473, p<0.05), C. gariepinus abundance and depth (r=-0.481, p<0.05), P. afer abundance and temperature (r=0.530, p<0.05) was observed. Fish species abundance and composition in Otamiri River was significantly affected by anthropogenic activities.