Studies on certain aspects of the development of resistance to cold shock in boar spermatozoa

SIGLEAvailable from British Library Document Supply Centre-DSC:DX198439 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Not Available

Not AvailableA trial was carried out to assess the effect of controlled induction of farrowing on sow performance and piglet viability in sows with prolonged gestation. Thirty healthy pregnant Duroc sows were randomly assigned into two groups balanced across the treatment for parity and day of gestation. Group I (n = 13) received a single intramuscular dose of prostaglandin analogue (2 ml Cyclix® containing 263 μg/ml Cloprostenol) on day 114 of gestation. Sows in the Group II (n = 17) were allowed to farrow naturally and kept as control group. Treatment effects were significant (P < 0.01) on litter size and weight at weaning. Significantly higher litter weight at birth was also observed in Group I (9.8 vs 5.04 kg; P < 0.01). Parturition loss was comparatively lesser in induced farrowing and a relatively higher percentage of piglet survivability was observed in Group I (90.2% vs 80.0%). Treatment effects were significant (P < 0.05) on incidence of stillbirth (8.0% vs 24.4% in Group I and II, respectively). Relatively higher number of animals farrowed during daytime (53.85%) in Group I as compared to Group II (29.41%). In prolonged gestational cases, induction of farrowing can be a useful managerial tool for improving the piglet survival and facilitating greater supervision of farrowing.Not Availabl

Not Available

Not AvailableA trial was carried out to assess the effect of controlled induction of farrowing on sow performance and piglet viability in sows with prolonged gestation. Thirty healthy pregnant Duroc sows were randomly assigned into two groups balanced across the treatment for parity and day of gestation. Group I (n = 13) received a single intramuscular dose of prostaglandin analogue (2 ml Cyclix® containing 263 µg/ml Cloprostenol) on day 114 of gestation. Sows in the Group II (n = 17) were allowed to farrow naturally and kept as control group. Treatment effects were significant (P < 0.01) on litter size and weight at weaning. Significantly higher litter weight at birth was also observed in Group I (9.8 vs 5.04 kg; P < 0.01). Parturition loss was comparatively lesser in induced farrowing and a relatively higher percentage of piglet survivability was observed in Group I (90.2% vs 80.0%). Treatment effects were significant (P < 0.05) on incidence of stillbirth (8.0% vs 24.4% in Group I and II, respectively). Relatively higher number of animals farrowed during daytime (53.85%) in Group I as compared to Group II (29.41%). In prolonged gestational cases, induction of farrowing can be a useful managerial tool for improving the piglet survival and facilitating greater supervision of farrowing.Not Availabl

Not Available

Thermal characterization of pig hair fibreHair fiber is a key by-product of humane slaughter of pigs with considerable economic value. In the present study, we investigated the thermal properties of pig hair fiber using Differential Scanning Calorimetry (DSC) and thermogravimetric analysis (TGA). The DSC curve showed a broad endotherm (around 50–80°C) initially, followed by denaturation doublet peaks (229°C and 239°C) and finally a pyrolysis endotherm. The melting enthalpy of pig hair fiber was 9.93 J/g on dry basis. During TGA, distinct phases of initial weight loss due to loss of moisture and later through thermal degradation of protein around 238–240°C were observed. Mean thermal insulation and conductivity values of pig hair fiber were 0.068 ± 0.004 m2K/W and 0.029 ± 0.003 W/m/K, respectively. The thermal characteristics of pig hair fiber were similar to other keratin fibers of animal origin.Not Availabl

Not Available

Not Availablehe present investigation was carried out to study the effect of different body measurement traits on pre-weaning body weight of 264 records of Ghungroo pigs maintained at the Institute Farm of National Research Centre on Pig, Guwahati, Assam by path analysis. The result showed that maximum variability in pre-weaning body weight was explained by height at fore leg (20.98%); followed by body length (19.50%), heart girth (6.60%) and paunch girth (5.80%). Though there is high correlation of height at hind leg with body weight, but its direct effect is negative. Effect of height at shoulder is also negligible. It was concluded from the present study, that among different body measurement traits to explain the pre-weaning body weight of Ghungroo pigs major importance is to be given to height at fore leg, body length, heart and paunch girth.Not Availabl

Not Available

Not AvailableThe study was carried out on three different genetic groups of pig viz. Hampshire, Duroc and crossbred maintained at pig breeding farm of National Research Centre on Pig, Guwahati. Least squares analysis of variance revealed highly significant (P<0.01) effect of genetic group on 0 day, 15 days, 30 days and 45 days body weight. Though the initial zero day body weight was significantly different among Hampshire, Duroc and crossbred piglets, but in the later stage of life i.e. 15 days, 30 days and 45 days there was no significant difference between Hampshire and crossbred piglets. Significant (P<0.05) effect of year of birth was found at different stages of preweaning body weight. Nonsignificant effect of season of birth was found on zero day and 15 days body weight. However, significant effect (P<0.05) was found on 30 days and 45 days body weight. Sex of piglets showed nonsignificant difference of body weight at different stage of life.Not Availabl

Not Available

Not AvailableTwelve crossbred pigs (32.10±1.03 kg, 3.8 months) were divided into two groups of six each in a completely randomized block design to study the effect of replacing maize with sugar beet on nutrient utilization. Animals were fed on two different rations containing 0% and 10% sugar beet in T1 and T 2 groups respectively. The protein content (% DM) of the ration ranged from 17.95±0.06 in ration T2 to 18.41±0.05 in ration T1. Nitrogen free extract content (% DM) of the rations ranged from 67.36±0.13 in ration T1 to 67.13±0.18 in ration T 2. The digestibility coefficient of dry matter, organic matter, crude protein, crude fibre, ether extract and nitrogen free extract was similar in T1 and T2 groups. The average daily gain (g/day) was 266.67±33.34 in T1 and 283.33±16.67 in T2 groups. The growth was found similar among the groups. The feed conversion ratio was 3.43±0.43 in T1 and 3.19±0.19 in T2 groups which was similar among the groups. It is concluded that 10% replacement of maize with sugar beet did not alter production performance of crossbred grower pigs.Not Availabl

Not Available

Not AvailableThe growth performance and nutrient digestibility on rice polish based feeding regime with and withoutphytase was studied in crossbred (Hampshire × Ghunghroo) pigs. The trial was conducted in two phases. Inphase-I (Grower stage), four iso-nitrogenous (CP18%) diets were prepared by incorporating rice polish at 25and 50% supplemented with phytase @ 20 and 40g/100 kg feed, respectively. The same animals were used insecond phase for finisher trial. In phase II, animals were fed on four iso-nitrogenous (CP16%) diets prepared byincorporation of rice polish at 50 and 70% supplemented with phytase @ 20 and 40g/100kg feed, respectively.Growth was significantly higher (P<0.05) in pigs of grower phase which was fed on rice polish at 50% levelhaving phytase enzyme (40g/100kg feed) with better feed conversion ratio (FCR) and lowest (P<0.01) feedingcost of Rs 49.33±1.48 per kg gain in comparison to other three groups. Digestibility of DM, CP, P and energyvalues increased significantly (P<0.05) by increasing rice polish from 25 to 50% in diet. However, the levels ofinclusion of rice polish with different doses of phytase supplementation in finisher pigs during phase-II did notexhibit any significant effect on ADG, FCR and feeding cost in finisher pigs. The highest average daily gain(ADG) with better FCR and lower (P<0.05) feeding cost per kg gain was recorded in pigs fed on rice polish at50% level with 20g phytase/100 kg. Digestibility of protein decreased (P<0.05) significantly with increasing ricepolish from 50 to 70% in diet irrespective of phytase level. On the other hand, digestible energy valuesincreased (P<0.05) significantly by increasing the rice polish from 50 to 70% in diet. Hence, at maximum of 40gphytase (two lac unit/100kg feed) and 20g phytase (one lac unit/100kg feed) was sufficient for better growthperformance of crossbred grower and finisher pigs, respectively fed diets containing 50% rice polishNot Availabl

Not Available

Not AvailableThe present study was designed to compare the efficacy of different liquid semen extenders for preservation of boar semen at 15°C. Twenty ejaculates, four from each of five Hampshire boars were used to study the efficacy of BTS, GEPS, FEY and LSEEY extenders for preservation of boar semen at 15°C up to 72 h. The mean sperm motility, live sperm and live spermatozoa with intact acrosome were found to be significantly (P < 0.05) higher in GEPS as compared to other extenders. The sperm motility, live sperm and live spermatozoa with intact acrosome differed significantly (P < 0.01) between extenders, preservation periods and interaction of extenders and preservation periods. GEPS was found to be the best extender for preservation followed by BTS, LSEEY and FEYNot Availabl

Not Available

AICRP on pig started its journey during IV the Five-year plan (1970-1971) with the main objective of studying the performance of purebred exotic pigsAnnual Report of AICRP on Pig AssamNot Availabl