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Occurrence of Ichthyophthiriasis in Pangasianodon hypophthalmus (Sauvage, 1878) Cultured in Net-Cages of Maithon Reservoir, Jharkhand, India

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Abstract

A preliminary study was carried out on striped catfish, Pangasianodon hypophthalmus for a period of 1 year, stocked in three different stocking densities (50/m3, 65/m3 and 80/m3) in the battery of 16 cages, (volume of 75 cubic meter each) at Maithon reservoir, (Jharkhand) during August 2014 to July 2015. Mass mortality of P. hypophthalmus in these net-cages was recorded during January and February, 2015. The Ichthyophthirius multifiliis, a ciliate pathogen, was identified as the causative agent by clinical signs and microscopy. The important clinical signs were presence of white spots on the skin and gills, and discolouration of blood in the diseased fish. Pathological sign such as tissue lesion and necrosis in liver and gill of diseased fish were also observed during the examination. The outbreak of ichthyophthiriasis resulting from I. multifiliis infection might be associated with lowered water temperature during January and February 2015, which leads to death of the infected fish species. This is the first report of ichthyophthiriasis from fish species cultured in net-cages.

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Acknowledgements

Authors are thankful to Director ICAR-Central Inland Fisheries Research Institute (CIFRI) and other technical and supporting staff for the financial and technical support.

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Authors and Affiliations

  1. ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, 700120, India

    Vikash Kumar, Suvra Roy, U. K. Sarkar & A. K. Das

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  1. Vikash Kumar
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  2. Suvra Roy
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  3. U. K. Sarkar
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  4. A. K. Das
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Correspondence to Vikash Kumar.

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Kumar, V., Roy, S., Sarkar, U.K. et al. Occurrence of Ichthyophthiriasis in Pangasianodon hypophthalmus (Sauvage, 1878) Cultured in Net-Cages of Maithon Reservoir, Jharkhand, India. Natl. Acad. Sci. Lett. 41, 275–278 (2018). https://doi.org/10.1007/s40009-018-0647-9

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  • DOI: https://doi.org/10.1007/s40009-018-0647-9

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