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(LWY) and Desi pigs was assessed by conducting a study in Kerala Agricultural University Pig Breeding Farm , Mannuthy (UPBF). Significant correlations were found between environmental variables and important production and reproduction traits in both breeds . The incidence o f . 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,litter 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 halothane sensitivity were inconsistent.But clear trends with breed and genetic groups existed between halothane 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 effeet.Based on the observations and the results suitable combinations of various environmental enrichments for different breeds, genotypes and purpose were’ designed which may be used as tools for developing managemental systems under different situations.
