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Effect of feeding-fasting interval on finishing pigs: weight gain, feed utilization and physical and chemical carcass measurements



Effect of feeding-fasting interval on finishing pigs: weight gain, feed utilization and physical and chemical carcass measurements



J. Animal Sci 30: 382-387



(a) Yorkshire pigs penned individually, 8 per group, were fed continuously from a self-feeder or fed to appetite for 1 day and starved for 1, 2 or 3 days, from 49 kg liveweight to slaughter at between 90 and 94 kg. The diet was maizemeal 71 5, soya bean meal 23.0% with minerals and vitamins. Growth was progressively reduced by starvation and pigs in the respective groupstook 58, 73, 121 and 218 days to reach slaughter weight, although daily intake of feed increased from 2.83 kg for pigs fed continuously to 4.30, 4.57 and 4.68 kg on the days they were fed for the starved groups. Weight gained per unit feed was significantly less with starvation for 2 or 3 consecutive days. Weights of stomach and gut and proportion of lean cuts in the carcass increased and dressing percentage, carcass weight and depth of back fat decreased with increase in interval between feeding. Starvation did not affect weight of liver or kidney but pituitary, thyroid and adrenals were enlarged. Pigs not fed for 2 or 3 days were inactive, had lower temperatures and were irritable when handled. Pigs fed continuously had more myristic and less stearic acid in inner and outer back fat. Pigs starved for 3 days had fat with more oleic and less linoleic acid than pigs of other groups.

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Accession: 014436366

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PMID: 5436450


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