Journal of Fisheries and Life Sciences

Author(s): Sirajum Monira Shanta and Fazlul Awal Mollah

Abstract: The work was carried out to evaluate the toxic effects of Sumithion on growth and breeding performance of Heteropneustes fossilis as a model organism under three experiments in the Mini Hatchery cum Breeding Complex, Bangladesh Agricultural University, Mymensingh from August 2015 to June 2016. In this study, four doses of Sumithion such as 8.0, 10.0, 12.0, 14.0 ppm were used and larvae produced only from 8.0 ppm which was further reared. A number of 100 fry of 35 days old from control and treated group were separately reared in two ponds of 2 decimal in sizes. The average final lengths for control group (25.84±0.27 cm) was significantly higher (p < 0.05) than treated group (21.82±0.25 cm) and the average final weights for control group (34.78±0.17 g) was significantly higher (p < 0.05) than treated group (25.3±0.38 g). The percent length gain value of treated group (959.22±29.46%) was significantly higher (p < 0.05) than control group (549.25±12.65%). The percent weight gain value of control group (1319.59±14.83%) was significantly higher (p < 0.05) than treated group (1029.46±26.85%). A breeding trial of H. fossilis was given with both Sumithion treated and untreated fish. The 35 days old fry obtained from 8.0 ppm Sumithion concentration could not attain complete maturity after nine months of rearing as none of them ovulated. On the contrary, 100% of control fish ovulated and 82.33% fertilization and 80.33% hatching were obtained. The ovulation was partially, fertilization (62.29%) and hatching rates (60.89%) of Sumithion treated fish were lower than the Sumithion untreated fish. The results of the above experiments suggested that Sumithion at the concentration of 8.0 ppm has adverse effect on growth and breeding performance of H. fossilis.