Nursing Order, Social Dominance and Growth in Swine

Scheel, David E.; Graves, H.B.; Sherritt, G. W.

doi:10.2527/jas1977.452219x

Cited by 82 publications

(40 citation statements)

References 3 publications

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“…Corroborating this hypothesis, AT and OT piglets groups did not differ on the frequency of agonistic behaviours. This suggests that teat order does not necessarily reflect the social hierarchy after weaning, in accordance with previous studies that concluded that the social hierarchy after weaning is related to the weight at the moment of the formation of the group, and not to the teat order (SCHEEL et al, 1977).…”

Section: Discussionsupporting

confidence: 77%

“…While some studies report that larger piglets establish themselves on anterior teats (FRASER & JONES, 1975), other studies support the current results (PLUSKE et al, 2007;SKOK et al, 2007). Some explanations about the preference for anterior teats are that the piglets that choose these teats are attracted by the vocalization of the sow, even before checking the quantity of milk available (JEPPERSEN, 1982), or that choice or discovery of a certain teat occurs randomly; after that, the setting of a fixed order would occur because piglets which defend the first teat it has established it after birth (SCHEEL et al, 1977).…”

Section: Discussionsupporting

confidence: 71%

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Teat order affects postweaning behaviour in piglets

et al. 2015

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The objective of this study was to investigate if piglets that suck anterior teats differ from the others in the litter in birth weight, if they have higher growth rate during lactation, and if this affects behaviour and post RESUMO O objetivo deste estudo foi verificar se leitões que mamam nas tetas anteriores diferem dos demais da leitegada no peso ao nascimento e tem maior taxa de crescimento durante a lactação, e se isso influencia o comportamento e ganho de peso pós-desmame, quando os leitões passam a receber dieta exclusivamente sólida. Para isso, a ordem da teta foi determinada durante a fase de amamentação em 24 leitegadas. Aos 28 dias de idade, os leitões foram desmamados e foram formados 24 grupos, compostos por um leitão que mamava nos dois primeiros pares de tetas (AT) e três leitões que mamavam nas demais tetas (OT). Embora o peso ao nascimento não tenha diferido de acordo com a ordem da teta, o ganho de peso até o desmame diferiu entre os grupos (AT : 6,64, EP 0,20kg, OT: 5,73, EP 0,13kg; P<0,001

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Section: Discussionsupporting

confidence: 77%

Section: Discussionsupporting

confidence: 71%

Teat order affects postweaning behaviour in piglets

et al. 2015

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“…Complete removal of the piglets from the sow occurs early during the third postnatal week. By postnatal day 30, the piglet's diet has been entirely grain-based for over a week and the frequency of feeding has decreased from 10-12 times per day to twice a day (2,12,33). Piglets of both sexes were studied in all age groups.…”

Section: Age Groups and Animal Carementioning

confidence: 99%

Developmental expression of eNOS in postnatal swine mesenteric artery

Reber

Clark

et al. 2002

American Journal of Physiology-Gastrointestinal and Liver Physi

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Developmental changes in the expression of endothelial nitric oxide synthase (eNOS) within the mesenteric artery of swine were studied in fetal (110 days postconception/117 days total gestation) and on postnatal days 1, 3, 10, and 30. Subjects in the 1-day-old group were subdivided into fed and nonfed. Transcription of eNOS was determined by real-time PCR, protein expression was evaluated by Western blotting, and hemodynamic and oxygenation parameters were measured within in situ gut loops before and after the administration of N G-monomethyl-l-arginine (l-NMMA). The abundance of eNOS mRNA remained steady throughout all ages. In contrast, expression of eNOS protein was twofold greater in the 1-day-old fed subjects compared with fetal or 1-day-old nonfed subjects. eNOS protein expression remained elevated on day 3, increased on day 10, and then declined to a level similar to the day 1 nonfed group by postnatal day 30. Intestinal vascular resistance was 31% lower in the day 1 fed group when compared to the day 1 nonfed group; resistance continued to decline through day 10 but then significantly increased on day 30. We conclude that the expression of eNOS changes within the mesenteric artery during early postnatal development at a posttranscriptional level.

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“…1977 (Hemsworth etal. 1976b (Scheel et al 1977). The socially dominant piglets are heavier at 3 wk of age (McBride et al 1965;Hartsock et al 1977;' Scheel et al 1917), and the heavier piglets suckle for longer periods of time (Hemsworth et al 1916a The feeding and management of the sows has been described previously (Dyck et al 1985 (Barber et al 1955;Fraser and Jones 1975;Fraser and Lin 1984;Fraser and Thompson 1986;McBride et al 1965 …”

mentioning

confidence: 99%