breeding and genetics nutrition aquaculture and fisheries adaptation physiology cell biology and...
Post on 18-Dec-2015
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- Breeding and genetics Nutrition Aquaculture and Fisheries Adaptation Physiology Cell Biology and Immunology Experimental Zoology Department of Animal Science Wageningen University
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- Intermittent suckling: possibilities to establish pregnancy during lactation & benefits to piglets Marieke Berkeveld Rosemarijn Gerritsen Pieter Langendijk In cooperation with Veterinary Faculty in Utrecht
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- Weaning-induced growth check after Weary et al., 2002 weaning
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- Bruininx et al., 2002 Feed intake shortly after weaning Many piglets hardly eat after weaning
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- Weaning related problems, due to age at weaning not familiar with dry feed Possible solution: Make pigs familiar with dry feed before weaning
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- Intermittent suckling: Suckling inhibited for 12 h per day from D14 of lactation
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- Feed intake before and after weaning Eat before weaning = eat after weaning Kuller et al., 2000
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- Feed intake before and after weaning Kuller et al., 2000
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- Distribution of feed intake during lactation Kuller et al., 2000 Intermittent suckling increases feed intake during lactation
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- Intermittent suckling increases feed intake during lactation, But weaning at conventional age still induces a growth check Possible solution: Also extend lactation without postponing next pregnancy
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- Growth in the IS model
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- Feed intake in the IS model
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- Relative growth from milk and dry feed
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- Conclusions Intermittent suckling results in better adaptation to weaning: Feed intake at weaning is considerably higher than normally There is hardly any growth check at weaning If sow is mated, lactation can be extended Consequences for reproduction ?
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- SourceStage of lactation h IS/day Boar contact? Sows in estrus Crighton, 1970D21-D3112yes1/5 Stevenson and Davis, 1984D14-D28 6 12 no 13/20 5/10 Grinwich and McKay, 1985D21-D35 3 22 yes