Impact of sow lactation feed intake on the growth and suckling behavior of low and average birthweight pigs to 10 weeks of age

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dc.contributor.authorHawe, Samuel J.
dc.contributor.authorScollan, Nigel
dc.contributor.authorGordon, Alan Wesley
dc.contributor.authorMagowan, Elizabeth
dc.date.accessioned2020-09-08T10:34:27Z
dc.date.available2020-09-08T10:34:27Z
dc.date.issued2020-05-09
dc.descriptionPublication history: Accepted - 2 May 2020; Published online - 9 May 2020.en_US
dc.description.abstractImproved genetics in commercial pig production have resulted in larger litter sizes. However this has increased the prevalence of compromised pigs exhibiting inferior birthweights, weaning weights, and lifetime performance. This study aimed to determine the effects of increased sow lactation feed intake on growth of low and average birthweight piglets until 10 wk of age. Low (Low BW; <1 kg) and average (Av BW; 1.3–1.7 kg) birthweight animals were reared in uniformly weighted litters comprising 14 piglets on a foster mother offered either a low (Low FA; max 7.5 kg/d) or high (High FA; max 11 kg/d) feed allowance over a 28- ± 1-d lactation. Piglet performance was monitored from birth until 10 wk of age. Sows offered a High FA consumed 42.4 kg more feed on average than those offered Low FA, resulting in a greater derived milk yield (P < 0.05). Animals of Av BW remained heavier than Low BW pigs throughout the trial (P < 0.05). Piglets reared by High FA sows were heavier at weeks 3, 4, 5, and 7 (P < 0.05) but not week 10 (P > 0.05). Growth rate of piglets relative to their birthweight was significantly greater for Low BW piglets than those of Av BW during lactation (P < 0.001). Piglets reared by sows offered a High FA expressed greater relative growth preweaning (P < 0.05); however, postweaning relative growth for piglets reared on sows offered a Low FA was greater (P < 0.05) suggesting compensatory growth. Neither birthweight nor sow feed allowance significantly affected preweaning mortality (P > 0.05). However, Low BW animals on sows with a High FA recorded half the preweaning mortality of Low BW pigs on sows with a Low FA. During week 1 of lactation, Av BW litters recorded a greater total suckling duration compared to Low BW litters (P < 0.05) but there was no difference in suckling frequency (P > 0.05). During week 3 of lactation, High FA litters displayed a significantly lower suckling frequency (P < 0.05) yet a greater total suckling duration (P < 0.001). Average daily gain was greater for Av BW pigs during weeks 4–7 (P < 0.001) but no difference was recorded between weeks 7 and 10 (P > 0.05). Average daily feed intake was greater for Av BW pigs throughout the nursery period (P < 0.05) but feed–conversion ratio did not differ compared to Low BW pens (P>0.05). In conclusion, offering sows a High FA increased weaning weight of all animals; however, birthweight was the major determinant of postweaning performance.en_US
dc.identifierhttp://hdl.handle.net/20.500.12518/172
dc.identifier.citationHawe, S. J., Scollan, N., Gordon, A. and Magowan, E. (2020) ‘Impact of sow lactation feed intake on the growth and suckling behavior of low and average birthweight pigs to 10 weeks of age’, Translational Animal Science. Oxford University Press (OUP), 4(2), pp. 655–665. doi: 10.1093/tas/txaa057.en_US
dc.identifier.issn2573-2102 (electronic)
dc.identifier.urihttps://doi.org/10.1093/tas/txaa057
dc.language.isoenen_US
dc.publisherOxford University Pressen_US
dc.rights© The Author(s) 2020. Published by Oxford University Press on behalf of the American Society of Animal Science. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.comen_US
dc.subjectcompromised pigsen_US
dc.subjectgrowthen_US
dc.subjectmortalityen_US
dc.subjectsuckling behavioren_US
dc.subjectweaningen_US
dc.titleImpact of sow lactation feed intake on the growth and suckling behavior of low and average birthweight pigs to 10 weeks of ageen_US
dc.typeArticleen_US

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