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Breed and parity differences in ovine placentation: Implications for placental efficiency and lamb vigour

Published online by Cambridge University Press:  20 November 2017

C. M. Dwyer ,
S. K. Calvert ,
M. Farish ,
S. Cotham ,
J. Donbavand ,
J. Chirnside  and
H. E. Pickup
C. M. Dwyer
Affiliation:
Behavioural Sciences Department, Animal Biology Division, SAC, West Mains Road, Edinburgh, EH9 3JG, UK
S. K. Calvert
Affiliation:
Behavioural Sciences Department, Animal Biology Division, SAC, West Mains Road, Edinburgh, EH9 3JG, UK
M. Farish
Affiliation:
Behavioural Sciences Department, Animal Biology Division, SAC, West Mains Road, Edinburgh, EH9 3JG, UK
S. Cotham
Affiliation:
Behavioural Sciences Department, Animal Biology Division, SAC, West Mains Road, Edinburgh, EH9 3JG, UK
J. Donbavand
Affiliation:
Behavioural Sciences Department, Animal Biology Division, SAC, West Mains Road, Edinburgh, EH9 3JG, UK
J. Chirnside
Affiliation:
Behavioural Sciences Department, Animal Biology Division, SAC, West Mains Road, Edinburgh, EH9 3JG, UK
H. E. Pickup
Affiliation:
Behavioural Sciences Department, Animal Biology Division, SAC, West Mains Road, Edinburgh, EH9 3JG, UK
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Extract

Lamb vigour at birth (i.e. time to stand after delivery) is known to be affected by a number of maternal factors, such as parity and litter size (Dwyer, 2002), as well as lamb breed (Dwyer et al., 1996), and is related to subsequent lamb survival (Dwyer et al., 2001). It is likely that these factors act before birth to influence lamb development and may exert their effects through differences in placental development and function. The purpose of this experiment was to examine the effects of ewe parity, litter size and ewe breed on placental components, and relate these to lamb behavioural development at birth.

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Type
Theatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2003 , 2003 , pp. 5
Copyright
Copyright © The British Society of Animal Science 2003

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References

Dwyer, C. M., Lawrence, A. B., Brown, H. E., & Simm, G. (1996) The effect of ewe and lamb genotype on gestation length, lambing ease and neonatal behaviour of lambs. Reproduction, Fertility & Development 8: 1123–1129.Google Scholar
Dwyer, C. M., Lawrence, A. B. & Bishop, S. C. (2001) Effects of selection for lean tissue content on maternal and neonatal lamb behaviours in Scottish Blackface sheep. Animal Science 72: 555–571.Google Scholar
Dwyer, C. M. (2002) Behavioural development in the neonatal lamb: Effect of maternal and birth-related factors. Theriogenology (in press).Google Scholar