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http://dx.doi.org/10.5352/JLS.2007.17.10.1309

Investigation of Diseases of Thai koi, Anabas testudineus (BLOCH) from Farming Conditions in Winter  

Ahmed, Gias Uddin (Department of Aquaculture, Bangladesh Agricultural University)
Dhar, Mili (Department of Aquaculture, Bangladesh Agricultural University)
Absar Khan, Mohammed Nurul (Department of Fisheries Technology, Bangladesh Agricultural University)
Choi, Jae-Suk (RIS, Industry-Academic Cooperation Foundation, Silla University)
Publication Information
Journal of Life Science / v.17, no.10, 2007 , pp. 1309-1314 More about this Journal
Abstract
Investigation on health conditions of Thai koi (Anabas testudineus) were carried out through clinical and histopathological observations from different farms of Mymensingh district for seven months during August 2006 to February 2007. Fish sampling and water quality parameters (temperature, dissolved oxygen and pH) were monitored on a monthly basis. Clinical examination of fishes was also carried out for any kind of abnormalities at monthly intervals. Samples of skin, muscle, gill, liver and kidney were observed by histological technique. Among the water quality parameters the values of water temperature, dissolved oxygen were found to be at unfavorable level for fish during the colder months in the farms. Clinically it was observed that fishes were more affected from December to January and almost normal in appearance during August to September and February. Different clinical symptoms like scale loss, dermal lesion, ulcer and loss of caudal fin were noticed in December and January. In histopathological study, structures of fish organs were normal from August to September. In the months of October and November, minor pathologies were found to be started. Marked pathological changes like necrosis, pyknosis, inflammation, hemorrhage, hypertrophy, hyperplasia, missing of primary and secondary gill lamellae were observed in the months of December and January. Whereas, in the month of February the pathological condition of fish gradually reduced. Again when considered individual fish farm, fishes of Reliance Aqua Farm were more affected than Sotota Matshya Hatchery. The study showed that severity of clinical and pathological changes were increased in December and January. During the period EUS and protozoan diseases were noticed in A. testudineus of the investigated farms.
Keywords
Thai koi; Anabas testudineus; fish diseases; pathological investigation;
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