alexa To Reduce Mortality of Fry Fish (Oncorhynchus mykiss) Caused with Viral Infection (Ipnv and Vhsv) by Water Treatment with Chloramin-T as Disinfectant | OMICS International
ISSN: 2150-3508

Fisheries and Aquaculture Journal
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Research Article

To Reduce Mortality of Fry Fish (Oncorhynchus mykiss) Caused with Viral Infection (Ipnv and Vhsv) by Water Treatment with Chloramin-T as Disinfectant

Saeed Ganjoor M*

Genetic and Breeding Research Centre for Cold Water Fishes (Shahid-motahari Centre), Iranian Fisheries Science Research Institute, Agricultural Research Education and Extention Organization (AREEO), Yasuj, Iran

Corresponding Author:
Saeed Ganjoor M
Microbiologist, Genetic and Breeding Research Centre for Cold Water Fishes (Shahid-motahari Centre)
P.O Box: 75914-358, Yasuj, Kohgiloye-va-Boyerahmad Province, Iran
Tel: 0098 919 008 1580
E-mail: [email protected]

Received Date: May 24, 2016; Accepted Date: July 23, 2016; Published Date: August 01, 2016

Citation: Ganjoor MS (2016) To Reduce Mortality of Fry Fish (Oncorhynchus mykiss) Caused with Viral Infection (IPNV and VHSV) by Water Treatment with Chloramin-T as Disinfectant. Fish Aquac J 7:176. doi:10.4172/2150-3508.1000176

Copyright: © 2016 Ganjoor MS. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

In winter of 2015 we observed gross mortality of fry fish in some tanks of a hatchery in Iran. They had dissonant swimming, spiral swimming, skin darkness, abdominal distension, and anorexia. At the beginning, mortality was low but it increased more and more during the several days. The fry were in fiberglass tanks with 1000 litres of water. It was about 20000 fry in each tank at the beginning. Two activities did synchronously while mortality observation. At the first, some fry sampled from each tanks and sent to laboratory for pathogen detection. The next, 9 tanks selected and grouped as 3 treatments (control, treatment-1 and treatment-2). Control treatment was consisting of 3 tanks that they had not mortality. Treatment-1 and Treatment-2 have the highest mortality and each of them was consisting of 3 tanks. Then, 10 ppm chloramin-T as disinfectant compound added to each tanks of treatment-1 during 1 hour in 3 continuous days (3 times). The tanks of treatment-2 added no drug. After 7 days mortality of fry in each tank estimated and compared with each other. Survival in tanks of treatment-1 was about 76% while survival in tanks of treatment-2 was about 27% while survival in control tanks was about 98%. One month later, results of laboratory tests reported. We found that fish of control tanks were safe (without pathogen) while fish of treatment-1 and treatment-2 were infected with IPN-virus and VHS-virus based on RT-PCR test. Totally 36 fry had been examined by RT-PCR. We founded that 10 fry were IPN+ and 2 of them were VHS+. Clearly; results showed that chloramin-T is able to control the viral infection of Oncorhynchus mykiss (p<0.05) in statistical comparison, it confirmed with SPSS software by using Anova-test. Chloramine-T increased surveillance from 27% to 76% while viral contamination had been confirmed.

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