Growth performance, recovery rate and fish yield of GIFT strain at various water depths under rice-fish culture systems
Effect of water depth on recovery rate, growth performance and fish yield of GIFT in the rice-fish production systems was studies in experimental plots of 123 m2 with a pond refuge of I meter deep which covered 10% of the total land area. Mortality rate of fish was very low ranging from 0.81-1.63%. However, at harvest, recovery rate ranged from 76.69-82.93% with the highest recovery at 11-15 em of water depth. Significantly the highest absolute growth (99.97) and specific growth rate (2.42%) were found at 21-25 cm water depth. The same treatment also produced significantly higher fish yield (909.76 kg/ha) although statistically similar to the fish yield (862.60 kg/ha) obtained at ll-15 em of water depth. Results also suggested that higher water depth can produce bigger fish but no significant effects of water depth was found on fish yield in the treatments 11-15 cm and 21-25 cm water depths of this experiment.
Main Authors: | Ali, M. Hazrat, Mateo, Lun G., Aragon, Miguel L. |
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Format: | article biblioteca |
Language: | English |
Published: |
2003
|
Subjects: | Biology, Fisheries, Rice-fish farming, GIFT, Water depth, |
Online Access: | http://hdl.handle.net/1834/33208 |
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