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Practical Approaches to Health Management for Cage Cultured Marine Fishes

Document format: pdf

Publisher: Network of Aquaculture Centres in Asia-Pacific

Creation date: September 2002

Large numbers of diseased fish dying is seldom observed in the natural environment unless environmental conditions have recently deteriorated. In the natural environment, fish lead a less stressful life and are free to move, and mortality is not easily observed. However, in the confined area of the net cages, fish are subjected to a large variety of stresses, such as handling in grading and net changing and it is easier to observe when there are mortalities due to one cause or another. The fish farmers usually observe the occurrence of disease soon after the fish are placed in the net cages. The newly placed fish often have hemorrhages and lesions on the body, indicating some bacterial infections, and die within a few days. This paper discusses several approaches to health management in cage cultured marine fishes.

Key Words: NACA • Marine Fishes • Cage Culture • Health Management • Southeast Asia • FAO