Effects of various growth promoters in the diets of macrobrachium rosenbergii post larvae
| dc.contributor.advisor | Susheela Jose | |
| dc.contributor.author | Boby Ignatius | |
| dc.contributor.author | KAU | |
| dc.date.accessioned | 2019-05-08T07:25:06Z | |
| dc.date.available | 2019-05-08T07:25:06Z | |
| dc.date.issued | 1994 | |
| dc.description | PG | en_US |
| dc.description.abstract | The present study was conducted to evaluate the efficiency of various growth promoters on the growth of Macrobrachium rosenbergii post larvae. The various growth promoters tried were antibiotic oxytetracycline, thyroid hormone thyroxine and the enzyme papain. Each growth promoter was incorporated in a casein based purified diet having a protein content of 36%.In the second experiment, the optimum level of growth promoter which showed the best performance in the first experiment was determined. The growth increment of prawns fed on casein based purified diets incorporated with antibiotic oxytetracyc1ine designated as diet T1 was 43.66mg, it was 35.064 mg for diet T2 - containing thyroid, and 32.172 mg for diet T3- containing papain. The growth increment for the control diet was seen to be 26.72 mg. Specific growth rate of the prawns from different treatments ranged from 1.73 to 2.52; with control diet showing the lowest and T1 the highest. Incorporation of the growth promoters in the feed has markedly reduced the food conversion ratio of the animals. Lowest FCR was obtained for the post larvae fed with oxytetracycline, while the highest was for the control, the range being 2.94 to 4.36. The protein efficiency ratio was highest being 0.9770 for the feeds containing oxytetracycline. The PER values for the control diet T0, diet T2 with thyroid, diet T3 with papain were found to be 0.6566, 0.8541 and 0.7576 respectively. Productive protein values were 8.995 for control diet, 13.4763 for diet with oxytetracycline, 11.7710 for diet with thyroid hormone and 10.4266 for diet with papain enzyme. The average survival rate during the experiment was 69.5%. The animals fed on antibiotic incorporated feed gave maximum survival of 72%, while the lowest rate of 66% was observed for thyroxine incorporated feed (T2). Analysis of the data on the various growth parameters in the experiment reveals that the antibiotic oxytetracycline gives better growth amongst the different growth promoters used. In the experiment II, four different levels of oxytetracycline were tested to find out the optimum level. The result of the study showed that, 10 mg/lOOg of feed is the optimum level of oxytetracycline which give maximum growth in Macrobrachium rosenbergii post larvae as indicated by overall growth , specific growth rate, food conversion ratio and protein efficiency ratio. | en_US |
| dc.identifier.citation | 170517 | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810102409 | |
| dc.keywords | Steroid hormones, macrobrachium rosenbergii post larvae, giant freshwater prawn | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | Department of Aquaculture, College of Fisheries, Panangad | en_US |
| dc.sub | Aquaculture | en_US |
| dc.subject | null | en_US |
| dc.theme | Effects of various growth promoters in the diets of fresh water prawns | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | Effects of various growth promoters in the diets of macrobrachium rosenbergii post larvae | en_US |
| dc.type | Thesis | en_US |