alexa Median Lethal Salinity (MLS96 h) of Two Small Indigenous Fish Species Amblypharyngodon mola and Pethia ticto from Indian Sundarban | OMICS International | Abstract
ISSN: 2155-9546

Journal of Aquaculture Research & Development
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Research Article

Median Lethal Salinity (MLS96 h) of Two Small Indigenous Fish Species Amblypharyngodon mola and Pethia ticto from Indian Sundarban

Dubey SK1*, Trivedi RK1, Rout SK1, Chand BK2 and Choudhury A3

1Department of Aquatic Environment Management, Faculty of Fishery Sciences, West Bengal University of Animal and Fishery Sciences, Kolkata-700094, India

2Directorate of Research, Extension and Farms, West Bengal University of Animal and Fishery Sciences, Kolkata-700037, India

3S.D. Marine Biological Research Institute, Sagar Island, Sundarban, West Bengal-743373, India

*Corresponding Author:
Dubey SK
Department of Aquatic Environment Management
Faculty of Fishery Sciences
West Bengal University of Animal and Fishery Sciences
Kolkata-700094, India
Tel: 033-24328749
E-mail: [email protected]

Received Date: June 24, 2014; Accepted Date: July 23, 2014; Published Date: August 02, 2014

Citation: Dubey SK, Trivedi RK, Rout SK, Chand BK, Choudhury A (2014) Median Lethal Salinity (MLS96 h) of Two Small Indigenous Fish Species Amblypharyngodon mola and Pethia ticto from Indian Sundarban. J Aquac Res Development 5:249. doi:10.4172/2155-9546.1000249

Copyright: © 2014 Dubey SK, et al. 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

Amblypharyngodon mola and Pethia ticto are small indigenous fish species belonging to family cyprinidae and considered as primary freshwater fish widely distributed in Indian subcontinent including Sundarban region. The 96-h median lethal salinity (MLS96 h) level of these fish was found out by exposing to saline water (0-10 ppt) in direct transfer method. The 96-h median lethal salinity for A. mola was found to be 6.20 ppt with 95% confidence intervals of 4.38-7.09 ppt where as for P. ticto it was 6.12 with 95% confidence intervals of 3.67-7.07 ppt. The Probit showed that at 6.12-6.20 ppt, 50% of the both test species shows sensitivity to salinity that leads to mortality. The regression analysis indicated that the mortality rate is positively correlated with salinity concentration having a regression coefficient close to 1.0 in each case. Various levels of external stress responses were noticed at 8 and 10 ppt salinity. The study suggests that these fish can potentially be used as a candidate species for aquaculture in slight brackishwater areas of Sundarban. However, further studies are required to understand the ecosystem based adaptation processes at higher salinity levels.

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