%0 Journal Article
%T The Effects of Oil-Based Mud (Obm) on the Survival of Periophthalmus barbarus (L) after 96 h
%A C. Nwakanma
%A A.I. Hart
%J Current Research Journal of Biological Sciences
%D 2012
%I Maxwell Science Publication
%X A study of the effects of Oil-Based Mud (OBM) on the survival of Periophthalmus barbarus (mean weight: 7.30¡À0.01 g) after 96 h was conducted using a non-renewable static bioassay techniques. In the acute study, the experimental fish were exposed in triplicates for 96 h to the following: 0% (control), 2, 4, 8, 10%, respectively of the toxicant (i.e., 1% = 100 ml/L).At P> 0.05 the results from the various concentrations were significantly different as cumulative mortality increased with increased concentration. The 96 hour lethal concentration (LC50) of OBM was 4.1%. The lethal time (LT50) for 2% and 10% of the toxicant were 96.58 h and 62 h. The result from the study implies that the oil ¨Cbased drilling fluid cannot be described as having low toxicity and being environmentally friendly as suggested by the producers.
%K Drilling fluid
%K mortality
%K Niger delta
%K Periophthalmus barbarus
%K toxicity
%K Toxicity
%U http://www.maxwellsci.com/jp/abstract.php?jid=CRJBS&no=245&abs=06