Evaluation of boar semen extended in belt`s ville thaw solution
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Date
2001
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Department of Animal Reproduction, College of Veterinary and Animal Sciences,Mannuthy
Abstract
An experiment was conducted to study the effect of natural service and artificial insemination on reproductive performance of pigs and to assess the fertility and preservability of boar semen extended in Belt's ville thaw solution. Twenty-four Large White Yorkshire (LWY) gilts, twenty-four sows and six LWY boars were selected for the study. Out of six boars, three boars were used for natural service and the other three maintained for artificial insemination purpose. A total of 52 ejaculates were collected from boars maintained for artificial insemination purpose at weekly intervals by the gloved hand technique. Among these boars, no significant differences were found for most of the semen characteristics except proximal and distal protoplasmic droplets , which were significantly different between boars (P<O.05). Negative correlation between total volume of ejaculate and sperm concentration was observed. No significant correlation between total sperm abnormalities and live sperm count could be detected. Twenty ejaculates from these boars were used for preservation studies. No significant variation In the preservability of spermatozoa could be detected between boars, whereas, there was a highly significant difference (p<O.O 1) in the preservability of spermatozoa between hours of preservation. Twelve LWY gilts and twelve sows (Group-I) and three boars were used for natural service. Each gilt and sow was mated twice during the oestrus. Twelve gilts and twelve sows (Group-Il) were artificially inseminated twice during the oestrus with the semen diluted in BTS. There was a significant difference (P<0.05) In the duration of oestrus between gilts and sows. There was a marginal difference in the conception rates between naturally served and artificially inseminated gilts and sows. The farrowing rate was 100 per cent for both naturally served and artificially inseminated gilts and sows. There was a significant difference in the gestation length between artificially inseminated gilts and sows. There was a significant variation• in the litter size between naturally served and artificially inseminated gilts and sows. It can be concluded from the study that artificial insemination In pIgS could well be performed under commercial farming conditions for effective disease control and increased productivity.
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171706