1. KAUTIR (Kerala Agricultural University Theses Information and Retrieval)
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Item Effect of dietary Cation-Anion balance on growth performance of broiler chicken(Department of Animal Nutrition, College of Veterinary and Animal Sciences, Mannuthy, 2005) Mary Juliet Francis; Viswanathan, T VAn investigation over a period of six weeks was carried out to study the effect of dietary cation-anion balance on growth performance of broiler chicken. One hundred and sixty commercial day-old broiler chicks were randomly allotted to four dietary treatments viz., Tl, T2, T3 and 14 having four replicates each. The experimental diets were standard broiler ration with varying DCAB of 260 meq/kg (Tl, control), 210 meq/kg (T2), 310 meq/kg (T3) and 360 meq/kg (T4). Cation-anion balance was varied using sodium bicarbonate and ammonium chloride. Results indicated that the dietary treatments did not differ significantly in body weight, weight gain, feed conversion ratio, feed intake, water consumption and processing yields. Body weight at the end of six weeks was 2069, 2031, 2047 and 2020 g and the cumulative mean body weight gain was 2023, 1984, 2000 and 1973 g for Tl, T2, T3 and T4, respectively. Average daily feed intake was 159.39, 164.46, 166.65 atid 169.81 g and mean cumulative PGR were 2.04, 2.02, 2.04 and 2.09, respectively, for Tl, T2, T3 and T4. No significant difference was observed in serum minerals or biochemical parameters such as serum uric acid, cholesterol and glucose. Birds in T3 and T4 showed significantly higher (P<0.05) intake and balance of sodium than Tl and T2. Retention of chloride was significantly higher (P<0.05) for T3 and T4 whereas chloride intake was significantly lower (P<0.05) for T3 and T4. Overall evaluation of the results of the present study reveals that dietary cation-anion balance does not have a significant influence on growth performance of broiler chicken.Item Effect of floor density on production performance of commercial hybrid layers(Department of Poultry Science, College of Veterinary and Animal Sciences, Mannuthy, 1992) Geo, A G; Amritha ViswanathIn order to prescribe optimum floor space allownace for the commercial hybrid layer ClLM-90) released from Mannuthy Centre of the 'AICRP on Poultry for Eggs' with the ultimate objective of reducing housing cost and achieving better labour efficiency, a study was carried out to evaluate its production performance on three different floor densities under "deep litter system of rearing. The floor densities evaluated were 1350/ 1575 and 1800 sq. cm. per bird. Each group was assigned to five replicates I and mean body weight at 20 weeks of age were kept uniform for all the replicates. Except for the difference in floor densities, all the managemental practices followed were uniform for the different treatment groups. Feed and water were given ad lib. The data were recorded for five, 28 day periods. Body . weight at 44th week of age and Age at fifty per cent production were not significantly influenced by the difference in floor densities- There was an increase in egg production as the floor space allowance per bird was increased and this increase was significant (P < 0-05) for the group provided with 1800 sq. cm. per bird than that of group provided with 1350 sq.cm. per bird. Feed consumption progressively increased as the floor space allowance increased and this increase was highly significant (P < 0.01). But/ the differences in feed efficiency among different groups were not statistically significant- Egg weight and other egg quality parameters such as shape Index, shell thickness. Albumen Index, Haugh Unit and Yolk Index were not affected by difference in floor space allowances. Mortality was also not found to be influenced by the difference in floor densities. Though the birds reared with a floor space of 1800 sq.cm. per bird showed higher egg production, the lower feed consumption, numerically higher efficiency of feed conversion and positive returns in terms of economics of production indicated that a floor density of 1350 sq.cm. per bird is more economical for the hybrid layer ILM-90 under Kerala condition.Item Evaluation of production performance in F strain of white Leghorn(Department of Poultry Science,College of Veterinary Science, Mannuthy, 1995) Beena C Joseph; Peethambaran, P AA study was carried out with ‘F’ strain of White Leghorn maintained at University Poultry Farm, Mannuthy in order to evaluate the production potential of the particular strain based on the part year performance. At the age of 18 weeks, 400 pullets belonging to four consecutive hatches were taken and housed in 100 multiple-bird cages of identical size at the rate of four hens per cage at random. Feed and water were given ad lib and the managemental practices were uniform for all cages. The production performance as well as meteorological observations were studied for five, 28-day periods from 21 to 40 weeks of age during the period from February through August 1994. Body weight at 20 and 40 weeks of age were recorded individually and the respective mean values were found out to be 944.05+ 8.86 g and 1346.67+ 12.19 g. The first egg in each cage was recorded and the mean age at first egg was 174.67+ 0.95 days. The mean ages at 10 and 50 per cent production in the flock were 178 and 196.5 days respectively. These values indicated very late maturity in the strain. The egg production was recorded as 56.73 eggs with 40.52 per cent on hen-housed basis and 57.09 eggs with 40.79 per cent on hen-day basis. The peak production was obtained at 32 weeks of age. The mean daily feed consumption was worked out as 93.83 g per bird. Feed efficiency worked out in terms of dozen eggs and kilogram egg mass were 2081 and 5.01 respectively. Egg weight at last three days in each period were indivitualy recorded and the overall mean egg weight for 21 to 40 weeks of age was 46.21 g. The total egg mass out put in the flock up to 40 weeks of age was 1044.07 kg with an average output of 2.61 kg per hen housed. Livability was found to be excellent (95.5 per cent ) in the strain. The mean of the maximum and minimum temperature recorded in the experimental house were 32.50 C and 26.120 C respectively. The mean per cent relative humidity was 76.67 in the F.N. and 69.18 in the A.N. On analysis of results, it was found that the body weight, egg production, feed consumption and egg weight are considerably low in this strain. There was poor uniformity in pullet body weight and also in age at sexual maturity. These traits can be improved if independent culling levels are fixed for body weight as well as for minimum rate of pay per bird. This strain can be improved further by applying selection for body weight at 20 weeks of age.Item Comparative study on the production characteristics of white leghorns in cages and on litter(Department of Poultry Science, College of Veterinary and Animal Sciences, Mannuthy, 1978) Balachandran, T N; Kochugovindan, Unni A K (Guide)This thesis embodies the results of an investigation carried out to study the productive traits of White Leghorn hens under the two housing systems. Single comb White Leghorn pullets formed the experimental subjects and the systems of housing employed were cage and deep litter management. The results revealed that rearing birds in cages significantly improved per cent hen-day production, body weight and feed efficiency. Feed consumption was more in floor reared birds. Birds in the two treatments maintained normal body weight, throughout the experimental period. The albumen and yolk quality showed no change attributable to treatments, but shell weight showed significant increase in the eggs from caged birds than the floor. There was no significant difference in livability. It was concluded that the cage system of management of layers could be employed as a means for better returns.Item Correlation between blood glucose level and liver glycogen storage in Japanese Quail (Coturnix coturnix japonica)(Department of Physiology and Biochemistry, College of Veterinary and Animal Sciences, Mannuthy, 1997) Raji, K; Surendranathan, K PItem Production performance of two-way and three-way crosses in white Leghorns(Department of Poultry Science, College of Veterinary and Animal Science, Mannuthy, 1977) Reghunathan Nair, G; Kochugovindan, A KThe analysis of the performance record of the Two-way and Three-way strain crosses maintained at the Central Poultry Breeding Farm, Hessarghatta, Banglore is reported in this thesis. The strain cross combination studied were MT, TM, MV, VM, VNT, VTM, TMV, and TVM. In order to evaluate the comparative efficiency of these two strain cross procedures egg production, egg weight, body weight, food efficiency and livability were used as the parameters. Both the two-way and three-way crosses were comparable in respect of egg production, egg weight, body weight and livability. Two-way crosses showed superior performance in respect of feed efficiency. Among the two-way crosses MT and TM showed better performance over there in respect of most of the economic traits. In the light of the above findings, it was concluded that two-way cross be preferred to three-way cross for exploiting heterosis. In view of the superior performance of MT and TM it was further concluded that the strains M and T can be used for evolving two-way crosses. The need for further refinement of these two pure strains with greater emphasis on egg weight is suggested.Item Dietary supplementation of turmeric (Curcuma longa) and tulasi (Ocimum sanctum) in layer quails (Coturnix coturnix)(Department Of Poultry Sciences,College of Veterinary and Animal Sciences, Mannuthy, 2008) Bhadra, P V; Anitha, PAn experiment was carried out to study the effect of dietary supplementation of turmeric and tulasi on production performance of Japanese quail layers. One hundred and sixty Japanese quails at 6 weeks of age were allocated randomly to four dietary groups with four replicates of ten quails each. Quail layer ration containing 22 per cent crude protein and 2650 kcal ME per kg feed formed the control diet T1. The control diet supplemented with dried turmeric rhizome powder, dried tulasi leaves and a combination of both each at 0.3 per cent level formed the diets T2, T3 and T4, respectively. The experiment was carried out for five periods of 28 days each from 7 to 26 weeks of age. The body weight at 6 and 26 weeks of age and the body weight gain during experimental period did not differ significantly between dietary treatments. Even though the age at first egg in the flock in dietary groups T1, T2, T3 and T4 was 48, 50, 49 and 49 days respectively, the mean age at 50 per cent production were almost similar in all dietary groups. The results obtained in the study revealed that period wise and cumulative mean values of quail housed and quail day egg number and per cent production, egg mass, daily feed consumption, FCR per dozen eggs and per kg egg mass did not differ significantly between dietary groups. The overall mean egg weight for three consecutive days towards the end of 10,14, 18, 22 and 26 weeks of age were non significant. Statistical analysis of the data pertaining to dressed, eviscerated, giblet and ready-to-cook yields revealed no significant difference between dietary groups. The loss of blood in dietary groups were significantly (P≤0.05) higher in group in T1 in comparison with group T4. While the mean values of feather loss showed no significant difference. The dietary supplementation of turmeric and tulasi combination (T4) significantly improved the haemoglobin and total leucocyte count in comparison with the control group whereas total erythrocyte count revealed no significant difference. The mean values of total cholesterol in serum differed significantly among each other (P≤0.05). Egg yolk cholesterol in group T3 and T4 showed significantly lower values in comparison with T1 (P≤0.05). Serum protein level in various dietary groups did not differ significantly among each other. The overall livability per cent was not adversely affected in turmeric and tulasi fed quails. The cost of feed per egg was lower in T2 and T3 (Rs. 0.43) compared to T1 (Rs. 0.47) and was intermediary in T4 (Rs. 0.45). The critical evaluation of the results revealed that the supplementation of dried turmeric and tulasi leaves separately and in combination, each at 0.3 per cent level in quail layer diets resulted in numerical increase in egg production leading to economical advantages.Item Utilisation of dried fish waste and fermented fish waste silage in japanese quail (Coturnix coturnix Japonica) layer ration(Department of Poultry Science,College of Veterinary and Animal Science, Mannuthy, 2007) Preeta Raghavan; Amritha ViswanathAn experiment was conducted in Japanese quail layers from 7 to 26 weeks of age by 100 per cent replacement of unsalted dried fish with dried fish waste and fermented fish waste silage on protein basis. The objective of the study was to assess the production performance as well as the economics of feed cost over production. One hundred and forty four Japanese quail (Coturnix coturnix japonica) pullets of 6 weeks of age were randomly allotted to three treatment groups with four replicates of 12 quails each. Quail layer ration containing 10 per cent unsalted dried fish formed control ration (T1). The other two diets were formulated by 100 per cent replacement of unsalted dried fish by dried fish waste (T2) and fermented fish waste silage (T3). The experiment was conducted for five 28- day periods from 7 to 26 weeks of age. Data on meteorological parameters, body weight, body weight gain, egg production, egg quality characteristics, sensory evaluation, livability and economics were the criteria used for evaluation. The body weights in groups T1, T2 and T3 were 189.37, 192.69 and 187.07g at 6 weeks and 213.15, 219.42 and 211.72g at 26 weeks of age respectively. The body weight and body weight gain during observation period for different dietary treatments did not differ significantly (P<0.05). All the birds in treatments viz., T1, T2 and T3 attained sexual maturity at the age of 42.5, 43.3 and 42 days. The age at sexual maturity, the age at 10 and 50 per cent production did not differ significantly (P<0.05) between treatments. The quail housed egg production and quail day egg production were statistically comparable among the treatment groups. The cumulative quail housed number of eggs in the different dietary groups were 77.96, 91.74 and 82.51 respectively. The cumulative quail day number of eggs were 80.57, 92.79 and 85.64 respectively. The overall mean feed consumption per bird per day were 30.89, 31.42 and 31.33g for T1, T2 and T3 respectively. Significantly lower feed consumption was noted in control group (T1). Overall mean feed efficiency were 0.61, 0.65 and 0.67 for treatment groups T1, T2 and T3 respectively. The overall mean egg weight of three dietary treatment groups T1, T2 and T3 were 11.91, 11.97 and 11.80g respectively and did not differ significantly (P<0.05). The cumulative mean egg quality traits such as shape index, albumen index, yolk index, internal quality unit and shell thickness did not differ significantly among the treatment groups. The mean score of sensory evaluation of quail eggs did not differ significantly among different dietary treatment groups. The livability per cent in treatment groups T1, T2 and T3 were 87.5, 85.4 and 70.8 per cent respectively. The cost of feed per egg was Rs.0.54, 0.37 and 0.42 for treatment groups T1, T2 and T3 respectively. Marked reduction in the feed cost was noticed in the diet containing dried fish waste (T2) followed by fermented fish waste silage included diet (T3) The overall evaluation of the study reveals that dried fish waste and fermented fish waste silage could be used economically to replace unsalted dried fish protein completely in Japanese quail layer rations, without any adverse effect on overall performance.Item Supplimentation of protease on the production performance of Japanese qualis (Coturnis coturnis japonica) fed low protein diet(Department of Poultry Science,College of Veterinary and Animal Science, Mannuthy, 2005) Sheena Grace Koshy; Elizabeth, V KItem Utilisation of dried cuttle fish (Sepia officialis) waste silage in layer duck ration(Department of Poultry Science, College of Veterinary and Animal Science, Mannuthy, 2005) Jayant Govindan; Peethambaran, P AAn experiment was conducted in Department of Poultry Science, Kerala Agricultural University during the period from June to November, 2004 to assess the utilization of dried cuttle fish waste silage (CFWS) on replacement of dried fish (DF) in indigenous layer duck ration. At the age of 24 weeks, 96 layer ducks were housed under cage system of rearing with two ducks per cage. They were divided into three groups T1, T2 and T3 comprising 32 ducks per group with 8 replicates having four ducks per replicate. The three groups of ducks were fed with dietary combinations of 10 per cent DF and zero per cent dried CFWS (T1), 5 per cent DF and 11.45 per cent dried CFWS (T2) and 22.9 per cent dried CFWS replacing DF completely (T3) and the diets were made isocaloric and isonitrogenous. The first egg in the flock was laid in groups T1 and T2 at 169 days of age and ages at 10 and 50 per cent production were also early in T1. The overall duck housed number and duck housed per cent production during 25-44 weeks of age were 75.06 and 53.61 in T1 which was though numerically superior was statistically non significant compared with T2 and T3. The overall mean daily feed consumption was 166.36,166.80 and 168.35 g per duck which were statistically comparable between various treatment groups. The overall feed conversion ratio per dozen eggs was 3.58, 4.23 and 4.32 and per kg egg mass was 4.65, 5.14 and 5.22 in T1, T2 and T3 respectively which was non-significant (P<0.05). The overall mean egg weight (EW) was 63.80, 67.74 and 67.09 g in T1, T2 and T3 having significantly lower EW in T1, whereas it was comparable between T2 and T3. The lower DHN in groups fed dried CFWS was compensated by higher mean egg weight and thereby total egg mass in the study periodwas maintained in the cuttle fish waste silage fed groups. All the internal egg quality traits namely, albumen index, yolk index, percent shell and shell thickness did not differ between treatment groups during five, 28-day periods. Livability was excellent in all groups. Economically, though control group showed higher feeding cost, due to higher egg number it returned higher margin of return over feed cost of rupees 0.26 per egg, whereas it was Rs. 0.04 in T2 and Rs.0.14 in T3. Thus, it was concluded that dried cuttle fish waste silage can be included at 11.5 and 22.9 per cent levels in duck layer rations with significantly higher mean egg weight as 50 and 100 per cent replacement for dried fish protein under cage system of rearing of ducks.