ScienceAsia 24 (1998): 193-198 |doi: 10.2306/scienceasia1513-1874.1998.24.193

THE EFFECT OF TRIPHENYLTIN HYDROXIDE TO CHROMOSOMES OF CATFISH (HYBRID OF CLARIAS MACROCEPHALUS AND C. GARIEPINUS)

PORNSAWAN VISOOTTIVISETH^a, ACHARAPORN SUNGPETCH^a AND SUCHINT NUKWAN^b

ABSTRACT: The effects of triphenyltin hydroxide (TPTH) pesticide on chromosomes of the F1 hybrid catfish (Clarias macrocephalus x C. gariepinus ) were studied by using a recycling water exposure system. The fishes were divided into 4 groups, i.e., control, control solvent (dimethylsulfoxide, DMSO), and 2 treatment groups which were exposed to TPTH at concentrations of 1 g/l and 3 g/J. The results showed that the organotin compound, TPTH, had deleterious effects on the chromosomes of catfish. Fish exposed to TPTH at a, concentration of 1 pg/l had chromosome deletions (5.3%) and non-specific chromosome aberrations (18%). The percentage of non-specific chromosome aberrations was higher (23.3%) when the fish were treated with TPTH at 3 g/l. The percentages of chromosome deletion occurred at both TPTH treated groups were not significantly different. The effects of TPTH on chromosomes of the hybrid catfish were not dose dependent.

Download PDF

a Department of Biology, Faculty of Science, Mahidol University, Rama VI Roa~ Bangkok, Thailand.
b Breeding section. The National Inland Fishery Institute, Bangkhen, Bangkok, Thailand.

Received January 12, 1998