CERTAIN SOCIAL ENVIRONMENTAL FACTORS ON THE REPRODUCTIVE PERFORMANCE OF PIGS
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Date
1996
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College of Veterinary and animal Science,Mannuthy
Abstract
An experiment was conducted to study the effect of social
environment on the reproductive performance of pigs and the
feasibility and economics of rearing pigs of either sex
together.
Sixteen weaned large white Yorkshire gilts, twelve weaned
sows and two boars were randomly assigned to five groups as
Ti, Tj, T3, T4 and T5 each consisting of six. Pigs in and T3
groups were bred at the body weight of 70-80 kg with
designated boars at the time-of breeding. The pigs in T5
group were bred in the first oestrus after weaning. In Tj and
T4 group female pigs were reared with boar.
Post weaning oestrus, duration of oestrus, conception
rate and gestation length did not vary significantly between
groups. Onset and intensity of oestrus were significantly
different (P<0.05) between groups. All gilts and sows in each
group were allowed to farrow in the same pen and their litter
performance was studied. The litter size and weight at birth
did not vary significantly {P>0.05) between the groups.
Litter size and weight at weaning did not vary significantly
{P>0.05) between groups. The behaviour of parents and other
penmates towards the litter did not vary significantly between
groups. The behaviour of penmates to the litter was cordial.
Overall results suggest that in farming conditions group housing system can be practiced. It is advisable to keep
animals in advanced stage of pregnancy in farrowing pens till
weaning of piglings.
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