Effect of ammonia-N on growth and feeding of juvenile Macrobrachium rosenbergii (De-Man) |
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| Authors: | Ajaz Ahmad Naqvi Subhendu Adhikari Bindu R Pillai & Niranjan Sarangi |
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| Institution: | Soil and Water Chemistry Section, Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar, India |
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| Abstract: | Survival rate, growth and feed intake were determined for late juveniles (4.31 ± 0.18 g) of river prawn Macrobrachium rosenbergii in freshwater with total ammonia‐N (NH3‐N+NH4‐N) concentrations of 0.015 (control), 0.5, 1.0 and 1.5 mg L?1 for 60 days at pH 7.53 ± 0.04 and temperature 24.0 ± 2.5°C. Survival rate was significantly (P<0.05) lower (54 ± 4.2–70 ± 5.4%) for total ammonia concentrations from 0.5 to 1.5 mg L?1 0.0139–0.0419 mg L?1 of unionized ammonia (NH3)]. Growth (0.026–0.030 g day?1 range) of the prawns did not differ for the different NH3 levels but were significantly (P<0.05) lower compared with control (0.056 g day?1). Feed intake rates also diminished significantly (P<0.05) from 77.60 ± 2.45% at control (0.015 mg L?1 NH3‐N) to 48.69 ± 2.13% at 1.5 mg L?1 NH3‐N (0.0419 mg L?1 of unionized NH3). |
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| Keywords: | ammonia-N growth feed intake Macrobrachium rosenbergii |
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