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   Single and Joint Toxicological Effect of Dispersit SPC 1000 and Bonny Oil on Mudskipper Fish (PeriophthalmusPapilio) from the Brackish Waters of Buguma, Rivers State, Nigeria  
   
نویسنده koranteng-addo ej ,horsfall m jnr ,joel of ,bentum jk
منبع journal of applied sciences and environmental management - 2018 - دوره : 22 - شماره : 11 - صفحه:1825 -1831
چکیده    Marine oil spillage accidents greatly impact major risks to the environment in terms of the acute and chronic adverse effects not only to the offshore, but also the coastal ecosystem. this study assessed single and joint toxicological effect of dispersit spc 1000 and bonny oil on mudskipper fish (periophthalmus papilio) from the brackish water research station of african regional aquaculture centre, buguma, rivers state, nigeria. the physicochemical parameters observed throughout the study were the ph, alkalinity and salinity were 6.83 ± 0.1, 40 mg/l± 0.2 and 17,655 mg/l respectively. the temperature and dissolved oxygen (d.o.) and specific gravity averaged 26.7 ◦ c ± 0.1, 5.70 mg/l ± 0.02 and 1.008 ± 0.001, respectively. dispersit spc 1000 was found to be toxic to the mudskipper at various % (v/v) concentration, above 60 % (v/v) concentration no fish survived after one hour. the relation between the probit mortality and log concentration showed a strong positive correlation between the dispersant concentration and fish mortality within 3 hours, with r^2 = 0.813 p = 0.05;the lethal dose lc50 was 73.48%. within 6 hours, the mortality increased as the dispersant exposure concentration was increased (r^2 = 0.872, p =0.05). the results of exposure of the mudskippers to the water-oil-dispersant mix (cewaf) showed lower mortalities. mortality was observed after 72 hours for dispersant concentration above 54 %. 63% dispersant concentrations, 20% mortalities was observed between 72 and 96 hours. dispersit spc 1000 alone was highly toxic, and the toxicity of cewaf was primarily caused by the presence of dispersant. there was no joint increase in toxicity between bonny oil and the chemical dispersant, as the mixing of the dispersant by the oil resulted in diminished toxicity of cewaf and lower mortality.
کلیدواژه Joint Toxicity ,Dispersit SPC1000 ,Mudskipper Fish
آدرس university of port harcourt, world bank africa center of excellence in oilfield chemicals research (ace-cefor), department of pure and industrial chemistry, nigeria, university of port harcourt, department of pure and industrial chemistry, Nigeria, university of port harcourt, world bank africa center of excellence in oilfield chemicals research (ace-cefor), Nigeria, university of cape coast, department of chemistry, Ghana
 
     
   
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