Integration of catfish (Clarius macrocephalus) cage culture with tilapia in earthen pond
1989
Charearn Udomkarn
Experiment on catfish (Clarias macrocephalus) cage culture integrated with tilapia species was carried out in 8 cages and 3 earthen ponds for 16 weeks. The effects of catfish stocking density on growth rate, survival rate and production of catfish and tilapia were investigated. Catfish fingerlings (average 24 g) were stocked in 8 cages (0.9x1.1x0.9 cubic meter/Cage) at the density of 100 and 200 fish/square m. Four cages were suspended in the first pond which stocked 200 tilapia fingerlings and another four cages in the second pond without tilapia. Two hundred tilapia fingerlings were stocked in the third pond which received chicken manure and urea weekly, as the control. Catfish were fed with commercial floating pellets twice daily at 3 % of fish body weight per day. Results of fish production showed no significant (P0.05) differences in daily weight gain, percentage weight gain, specific growth rate, survival rate, and food conversion ratio of catfish stocked at different density. Production of catfish was significantly higher at stocking density of 200 fish/square m (16.7 kg/square m) than 100 fish/sq. meter (8.6 kg/square m). There were significant (P0.05) differences in daily weight gain, percentage weight gain and specific growth rate of catfish at different conditions (ie., integration and nonintegration with tilapia) but no significant differences in survival rate, production and food conversion ratio. Tilapia fed on wastes from catfish culture gave higher production (26 kg/200 square m) than tilapia reared on chicken manure (8.75 kg/square m).
Показать больше [+] Меньше [-]