Histopathological and Behavioral Changes in Oreochromis sp. after Exposure to Different Salinities
- *Corresponding Author:
- Marina Hassan
Department of Aquaculture Science
Faculty of Fisheries and Aqua-Industry
University Malaysia Terengganu
Tel: +609 668 3205
Received Date: February 28, 2013; Accepted Date: March 02, 2013; Published Date: March 25, 2013
Citation: Hassan M, Zakariah MI, Wahab W, Muhammad SD, Idris N, et al. (2013) Histopathological and Behavioral Changes in Oreochromis sp. after Exposure to Different Salinities. J Fisheries Livest Prod 1:103. doi:10.4172/2332-2608.1000103
Copyright: © 2013 Hassan M, 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.
A study was carried out in the laboratory on the adaptability and tolerance of the Tilapia fingerlings, Oreochromis sp. to different salinities. This data has provided important information on the possibility of its culture in marine environment or brackish water. We investigated the histopathological changes and behavioral changes of the fish challenged with four different salinity treatments including a control (0, 5, 20 and 35 ppt) for 96 hours. The Tilapia fingerlings with the size 10-14 cm total length acclimated successfully to freshwater before introduced to hyper-saline environment. The results showed that all fish survive in 0 ppt and 5 ppt, while 75% death in 20 ppt and 100% death in 35 ppt. The mortality rate was increased with increased of salinity. Fish exposed to different salinities exhibited clinical signs agitated behavior, respiratory distress, abnormal nervous behavior and death were recorded. Degeneration, necrosis, hemorrhage and hyperplasia of kidney and gills were observed as major histopathological changes.