Research Article Open Access

Toxicity of Endosulfan to the Red Hybrid Tilapia

Dwight E. Robinson1 and Winroy Williams1
  • 1 University of the West Indies, Jamaica

Abstract

Exposure of mature red hybrid Tilapia sp. to a range of sub-lethal concentrations of endosulfan for 21 days induced a spectrum of often not clearly distinguishable Behavioural Toxic Symptoms (BTS), ranging from reversible to eventually fatal responses. The No Observed Effect Concentration (NOEC: Below the threshold of BTS) and the Lowest Observed Effect Concentration (LOEC: Above the threshold of low intensity and reversible BTS and below the threshold of any mortality) were <0.005 and <0.0075 mg L-1, respectively. Two other categories of BTS were also distinguishable. Medium Observed Effect Concentration (MOEC: Reversible, medium-intensity BTS in 75% and pronounced, lethal BTS in 25% individuals) and Pronounced Observed Effect Concentration (POEC: Leading to mortality of >25% to 50% of the fish) were 0.01 and 0.02 mg L-1, respectively. The 3-day and 21-day LC50 values were 0.031 and 0.016 mg L-1, respectively.

OnLine Journal of Biological Sciences
Volume 15 No. 1, 2015, 6-9

DOI: https://doi.org/10.3844/ojbsci.2015.6.9

Submitted On: 24 February 2015 Published On: 11 March 2015

How to Cite: Robinson, D. E. & Williams, W. (2015). Toxicity of Endosulfan to the Red Hybrid Tilapia. OnLine Journal of Biological Sciences, 15(1), 6-9. https://doi.org/10.3844/ojbsci.2015.6.9

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Keywords

  • Endosulfan
  • Toxicity
  • Tilapia