Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-28T17:26:49.981Z Has data issue: false hasContentIssue false
  • English
  • Français

Quantitative observations on pig embryos of known ages

Published online by Cambridge University Press:  27 March 2009

A. W. Marrable  and
R. R. Ashdown
A. W. Marrable
Affiliation:
Department of Veterinary Anatomy, University of Bristol, Park Bow, Bristol 1
Get access Rights & Permissions [Opens in a new window]

Extract

1. The lengths and weights of 241 pig embryos, aged 26–109 days, were recorded; the pregnant sows were from a mixed herd of Landrace, Large White and Wessex stock and some of their crosses.

2. An empirical linear regression of length on age was estimated (equation 1); the relation between weight and age was represented by a polynomial weight and age was represented by a polynomial (equation 2).

We thank Mr A. S. Cray and the other directors of Unigate Ltd. for giving us the pigs; Mr P. Sedgewick of that Company gave us excellent co-operation. Prof. C. W. Ottaway and Dr P. Radford helped us throughout the investigation.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 69 , Issue 3 , December 1967 , pp. 443 - 447
Copyright
Copyright © Cambridge University Press 1967

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Asdell, S. A. (1965). Patterns of Mammalian Reproduction, ed. 2.London: Constable.Google Scholar
Ashdown, R. R. & Marrable, A. W. (1967). Adherence and fusion between the extremities of adjacent embryonic sacs in the pig. J. Anat, 101, 269–75.Google ScholarPubMed
Le Breton, E. & Sohaeffer, G. (1923). Variations biochemiques du rapport nueleo-plasmatique au cours du developpement embryonnaire. Travaux de Vinstitut de Physiologie, Faculti de Midecine de Strasbourg. Paris: Masson.Google Scholar
Lowrey, L. G. (1911). Prenatal growth of the pig. Am. J. Anat. 12, 107–38.CrossRefGoogle Scholar
Mendel, L. B. & Mitchell, P. H. (1907). Chemical studies on growth. I. The inverting enzymes of the alimentary tract, especially in the embryo. Am. J. Physiol. 20, 81–96.CrossRefGoogle Scholar
Mitchell, H. H., Carroll, W. E., Hamilton, T. S. & Hunt, G. E. (1931). Food requirements of pregnancy in swine. Bull. III. agric. Exp. Stn 375, 467–504.Google Scholar
Needham, J. (1931). Chemical Embryology. Cambridge University Press.CrossRefGoogle Scholar
Pomeroy, R. W. (1960). Infertility and neonatal mortality in the sow. III. Neonatal mortality and foetal development. J. agric. Sci., Camb. 54, 41–56.CrossRefGoogle Scholar
Ullrey, D. E., Sprague, J. I., Becker, D. E. & Miller, E. R. (1965). Growth of the swine fetus. J.Anim. Sci. 24, 711–17.CrossRefGoogle ScholarPubMed
Warwick, B. L. (1928). Prenatal growth of swine. J. Morph. 46, 59–84.CrossRefGoogle Scholar