Response of bighead carp (Aristichthys nobilis, Richardson) fry to different feeding levels and frequencies [Philippines]
1985
Carlos, M.H.
Results showed that final mean weight, final length, and actual daily growth rates differed in feeding rates, but not in feeding frequencies. The highest values were achieved in 30% feeding level and feeding only once a day. The values of ad libitum feeding were significantly higher than the other treatments. Interaction effect on growth was manifested only in final weight and actual daily growth rates. Direct relationship existed only between the growth parameters and the feeding rate but not with feeding frequency. Fry survival yielded significant differences in feeding frequencies, but not in feeding rates. Highest values were obtained at 30% feeding level, and feeding only once. Control was not significantly different from the treatments. Interaction effect was also noted. Survival had an inverse relationship with feeding frequency, but no relationship existed in feeding ratio. Normalized biomass index yielded significant differences both in feeding rates and feeding frequencies. Highest values were obtained at 30% feeding level and feeding only once. Interaction effect was also noted and direct relationship was found in feeding level only. Simple cost and return analysis revealed that 30% feeding level is better than control, yielding a return on investment of 33.89%
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