Age-specific differences in sensitivity of the banana shrimp, Penaeus merguiensis (de Man) to mercury toxicity


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Authors

  • K Vinod ICAR Research Complex for NEH Region, Barapani - 793 103, Meghalaya, India
  • U G Bhat Department of Marine Biology, School of Ocean Sciences, Karnatak University P.G. Centre, Kodibag, Karwar, Karnataka - 581 303, India
  • N Kusuma Department of Marine Biology, School of Ocean Sciences, Karnatak University P.G. Centre, Kodibag, Karwar, Karnataka - 581 303, India

Abstract

Age-specific differences in sensitivity to mercury toxicity was studied on different life-history stages of the banana shrimp, Penaeus merguiensis, an ecologically and commercially important shrimp species of Karwar coast, Karnataka. Acute toxicity bioassay studies were conducted on egg, nauplius,
protozoea, mysis, postlarvae 5 (PL5) and postlarvae 20 (PL20) of P. merguiensis. The 24-hour LC50 value of mercury on egg was 0.0055 ppm. Hatching rate of eggs were 73% and 8% respectively in the lowest (0.003 ppm) and highest
concentrations (0.015 ppm) tested. The 24-hour median lethal concentration of mercury on the first larval stage nauplius was 0.0046 ppm, while the 48- hour LC50 values of mercury were 0.0035, 0.0058, 0.0115 and 0.026 ppm on protozoea, mysis, PL5 and PL20 stages respectively. The 24-hour LC50 value of
mercury on eggs indicated that the eggs were more resistant when compared to nauplius and the order of relative sensitivity of different life-history stages of P. merguiensis to mercury toxicity was nauplius > eggs > protozoea > mysis
> PL5- > PL20

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Author Biographies

  • K Vinod, ICAR Research Complex for NEH Region, Barapani - 793 103, Meghalaya, India
    ICAR Research Complex for NEH Region, Barapani - 793 103, Meghalaya, India
  • U G Bhat, Department of Marine Biology, School of Ocean Sciences, Karnatak University P.G. Centre, Kodibag, Karwar, Karnataka - 581 303, India
    Department of Marine Biology, School of Ocean Sciences, Karnatak University P.G.
    Centre, Kodibag, Karwar, Karnataka - 581 303, India
  • N Kusuma, Department of Marine Biology, School of Ocean Sciences, Karnatak University P.G. Centre, Kodibag, Karwar, Karnataka - 581 303, India
    Department of Marine Biology, School of Ocean Sciences, Karnatak University P.G.
    Centre, Kodibag, Karwar, Karnataka - 581 303, India

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Issue

Vol. 51 No. 1 (2004)

Section

Articles

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How to Cite

Vinod, K., Bhat, U. G., & Kusuma, N. (2011). Age-specific differences in sensitivity of the banana shrimp, Penaeus merguiensis (de Man) to mercury toxicity. Indian Journal of Fisheries, 51(1), 97-102. https://epubs.icar.org.in/index.php/IJF/article/view/7170