Assessment of heavy metals in fish species and some physico-chemical parameters of Oguta lake, Oguta, Imo state, Nigeria

Abstract

This study was carried out to investigate some physico chemical parameters and also to examine Nickel Lead Manganese and Copper from Gill liver and fillet of three selected fin fish species Oreochromis niloticus Synodontis clarias and Hepsetus odoeof the lake to provide information on the human consumption safeties of these fish samples from the lake Surface water and fish samples from three stations and fisherman landing site respectively were collected bi monthly for three months Surface water temperature pH and Dissolved Oxygen were measured in situ while other parameterswere determined according to APHA standard methods Data were analyzed using descriptive statistics ANOVA and Duncan Multiple Range Test DMRT at alpha All the measured physico chemical parameters are within the recommended permissible limit for aquaculture Copper recorded the highest metal concentration mu g g in the gill of Oreochromis niloticus Nickel was not detected in all the observed fish species The mean concentrations of all the metals in the present study were lower than the permissible limits thus the sampled fish from the lake are generally safe for human consumption