EFFECT OF ENRICHMENT OF ENVIRONMENT AND HALOTHANE SENSITIVITY ON PERFORMANCE OF LARGE WHITE YORKSHIRE AND DESI PIGS
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Date
1997
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COLLEGE OF VETERINARY AND ANIMAL SCIENCES-MANNUTHY,THRISSUR
Abstract
The effect of environmental variables,
halothane sensitivity and environmental enrichments in the form
of wallowing, water sprinkling and access to a shaded range on
various production and reproduction traits of exotic(LWYJ and
Desi pigs was assessed by conducting a study in Kerala
Agricultural University Pig Breeding Farm , Mannuthy (UPBl).
Significant correlations were found between environmental
variables and important production and reproduction traits
in both breeds . The incidence of halothane sensitivity was
found to be higher in LWY when compared to that of Desi.A clear
breed difference was noticed between Desi and LWY with respect to
traits such as body weight,daily weight gain,body measurements,
feed intake, feed conversion efficiency(FCE), weaning weight,cost
of production for unit meat and weaned piglet.Environmental
enrichments were found to be beneficial for most of the traits
such as body weight, daily weight gain,FCE,conception rate,live
litter size at birth,birth weight,1itter weight at weaning and
average weaning weight.When halothane sensitive animals were
better in FCE and growth rate, halothane resistant animals came
out with good reproduction results.But positive animals with
environmental enrichments performed better than negative in
certain traits.The biochemical traits associated with haiothane
sensitivity were inconsistent.But clear trends with breed and
genetic groups existed between haiothane positive and negative
animals.An apparently clear interaction between breeds, genotype
and environmental enrichments were niticed in certain production
and reproduction traits.Provision for access to a shaded range
was found to be beneficial for fattening pigs with respect to FCE
and growth rate.Wallowing and water sprinkling have got negative
effect on these traits.But for reproduction traits all the above
enrichments had beneficial effect.Based on the observations and
the results suitable combinations of various environmental
enricfimenLs for different breeds, geno types and purpose were
deslgried which fnay be used as tools for developing managemental
systems under different situations.
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