Water quality management
during transportation of fry of Indian major carps, Catla catla
(Hamilton), Labeo rohita (Hamilton) and Cirrhinus mrigala
(Hamilton)
R. Kumar Singh, V.R. Vartak, A.K. Balange, M.M.
Ghughuskar-2004
Aquaculture, 235(1-4): 297-302
Abstract:
The effects of various agents viz. Tris buffer,
zeolite, 2-phenoxyethanol and Oxyflow in controlling the development of
toxic by-products and maintenance of high dissolved oxygen levels during
transportation of fry of Indian major carps Catla catla, Labeo
rohita and Cirrhinus mrigala were studied. Neomycin sulphate at
20 mg l−1 was added in each plastic bag containing 1500 fry
(L=30±0.76 mm, W=410±7.66 mg) in 3 l water to control
bacterial growth. Each experiment was conducted for 48 h. Zeolite, at 7 g l−1,
was found to considerably reduce the concentration of ammonia resulting in
increased survival. Similarly, Tris buffer at 0.01 M and 2-phenoxyethanol at
0.09 ml l−1 gave 100% survival. Oxygen concentration
increased considerably when Oxyflow was applied at 250 and 500 mg l−1
which resulted in 100% survival of the fry.
(Taraporevala Marine Biological Research Station, New
Administrative Building, Third floor, Bandra (E), Mumbai 400051, India,
e-mail: tmbrs@rediffmail.com)