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Original Articles

Seasonal effects on birth weight in sheep are associated with changes in placental development

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Pages 337-345 | Received 21 Dec 1994, Accepted 22 Mar 1995, Published online: 17 Mar 2010

References

  • Alexander , G. 1964a . Studies on the placenta of the sheep (Ovis aries L.). Placental size . Journal of reproduction and fertility , 7 : 289 – 305 .
  • Alexander , G. 1964b . Studies on the placenta of the sheep (Ovis aries L.). Effect of surgical reduction in the number of caruncles . Journal of reproduction and fertility , 7 : 307 – 322 .
  • Barenton , B. , Ravault , J.‐P. , Chabenet , C. , Daveau , A. , Pelletier , J. and Ortavant , R. 1988 . Photoperiodic control of growth hormone secretion and body weight in rams . Domestic animal endocrinology , 5 : 247 – 255 .
  • Bassett , J. M. , Bomford , J. and Mott , J. C. 1988 . Photoperiod: an important regulator of plasma prolactin concentration in foetal lambs during late gestation . Quarterly journal of experimental physiology , 73 : 241 – 244 .
  • Bassett , J. M. 1992 . Effects of additional lighting to provide a summer photoperiod for winter‐housed pregnant ewes on plasma prolactin, udder development and lamb birthweight . Journal of agricultural science, Cambridge , 119 : 127 – 136 .
  • Bassett , J. M. , Curtis , N. , Hanson , C. and Weeding , C. M. 1989 . Effects of altered photoperiod or maternal melatonin administration on plasma prolactin concentrations in fetal lambs . Journal of endocrinology , 122 : 633 – 644 .
  • Bergmeyer , H. U. 1974 . Methoden der enzymatischen analyse , second English edition vol. 3 , 175 Weinheim
  • Bocquier , F. 1985 . Influence de la photoperiode et de la temperature sur certains equilibres hormonaux et sur les performances zootechniques de la brebis en gestation et en lactation , France : Institut National Agricole Paris‐Grignon . PhD thesis
  • Breier , B. H. , Gallaher , B. W. and Gluckman , P. D. 1991a . Radioimmunoassay for insulin‐like growth factor‐1: solutions to some potential problems and pitfalls . Journal of endocrinology , 128 : 347 – 357 .
  • Breier , B. H. , Gluckman , P. D. , McCutcheon , S. N. and Davis , S. R. 1991b . Physiological responses to somatotropin in the ruminant . Journal of dairy science , 74 (Suppl. 2) : 20 – 34 .
  • Flux , D. S. , Mackenzie , D. D. S. and Wilson , G. F. 1984 . Plasma metabolite and hormone concentrations in Friesian cows of differing genetic merit measured at two feeding levels . Animal production , 38 : 377 – 384 .
  • Forsyth , I. A. , Byatt , J. C and Iley , S. 1985 . Hormone concentrations, mammary development and milk yield in goats given long‐term bromocriptine treatment in pregnancy . Journal of endocrinology , 104 : 77 – 85 .
  • Gilmour , A. R. 1990 . REG—a generalised least square means program. Version 90. 12 , Australia : New South Wales Agriculture and Fisheries .
  • Gluckman , P. D. 1984 . Functional maturation of the neuroendocrine system in the perinatal period: studies of the somatotropic axis in the ovine fetus . Journal of developmental physiology , 6 : 301 – 312 .
  • Gluckman , P. D. , Morel , P. C. H. , Ambler , G. R. , Breier , B. H. , Blair , H. T. and McCutcheon , S. N. 1992 . Elevating maternal Insulin‐like Growth Factor‐1 in mice and rats alters the pattern of fetal growth by removing maternal constraint . Journal of endocrinology , 134 : R1 – R3 .
  • Jenkinson , C. M. C , Peterson , S. W. , Mackenzie , D. D. S. and McCutcheon , S. N. 1994 . The effects of season on placental development and fetal growth in sheep . Proceedings of the New Zealand Society of Animal Production , 54 : 227 – 230 .
  • McCutcheon , S. N. , Holmes , C. W. and McDonald , M. F. 1981 . The starvation‐exposure syndrome and neonatal lamb mortality. A review . Proceedings of the New Zealand Society of Animal Production , 47 : 209 – 217 .
  • Mellor , D. J. and Matheson , I. C. 1979 . Daily changes in the curved crown‐rump length of individual sheep fetuses during the last 60 days of pregnancy and effects of different levels of maternal nutrition . Quarterly journal of experimental physiology , 64 : 119 – 131 .
  • Mellor , D. J. , Mitchell , B. and Matheson , I. C. 1977 . Reductions in lamb weight caused by pre‐mating carunclectomy and mid‐pregnancy placental ablation . Journal of comparative physiology , 87 : 629 – 633 .
  • Mellor , D. J. and Murray , L. 1982 . Effects of long‐term undernutrition of the ewe on the growth rates of individual fetuses during late pregnancy . Research in veterinary science , 32 : 177 – 180 .
  • Mellor , D. J. and Murray , L. 1985 . Effects of maternal nutrition on udder development during late pregnancy and on colostrum production in Scottish Blackface ewes with twin lambs . Research in veterinary science , 39 : 230 – 234 .
  • Morris , S. T. , Blair , H. T. , Parker , W. J. and McCutcheon , S. N. 1993 . Evaluation of Border Leicester × Romney (BR), Poll Dorset × BR, and Suffolk × BR ewes for out‐of‐season lambing . New Zealand journal of agricultural research , 36 : 349 – 362 .
  • Ortavant , R. , Bocquier , F. , Pelletier , J. , Ravault , J. P. , Thimonier , J. and Volland‐Nail , P. 1988 . Seasonality of reproduction in sheep and its control by photoperiod . Australian journal of biological sciences , 41 : 69 – 85 .
  • Owens , J. A. , Falconer , J. and Robinson , J. S. 1987 . Effect of restriction of placental growth on fetal and utero‐placental metabolism . Journal of developmental physiology , 9 : 225 – 238 .
  • Parr , R. A. , Williams , A. H. , Campbell , I. P. , Witcombe , G. F. and Roberts , A. M. 1986 . Low nutrition of ewes in early pregnancy and the residual effect on the offspring . Journal of agricultural science, Cambridge , 106 : 81 – 87 .
  • Peterson , S. W. 1992 . The role of prolactin in the control of ovine lactogenesis , Palmerston North, , New Zealand : Massey University . Unpubl. PhD thesis
  • Peterson , S. W. , Mackenzie , D. D. S. and McCutcheon , S. N. 1990 . Milk production and plasma prolactin levels in spring‐ and autumn‐lambing ewes . Proceedings of the New Zealand Society of Animal Production , 50 : 483 – 485 .
  • Rattray , P. V. , Thompson , K. F. , Hawker , H. and Sumner , R. M. W. 1987 . “ Pastures for sheep production ” . In Livestock feeding on pasture , New Zealand Society of Animal Production occasional publication no. 10 Edited by: Nicol , A. M. 89 – 103 .
  • Ravault , J. P. and Ortavant , R. 1977 . Light control of prolactin secretion in sheep. Evidence for a photoinducible phase during a diurnal rhythm . Annales de biologie animate, biochimie et biophysique , 17 : 459 – 473 .
  • Reid , T. C , Sumner , R. M. W. and Wilson , L. D. 1988 . Performance parameters in an autumn‐lambing ewe flock . Proceedings of the New Zealand Society of Animal Production , 48 : 91 – 94 .
  • Schinckel , P. G. and Short , B. F. 1961 . The influence of nutritional level during pre‐natal and early postnatal life on adult fleece and body characters . Australian journal of agricultural research , 12 : 176 – 202 .
  • Spencer , G. S. G. 1985 . Hormonal systems regulating growth. A review . Livestock production science , 12 : 31 – 46 .
  • Stelwagen , K. , Grieve , D. G. , Walton , J. S. , Ball , J. L and McBride , B. W. 1994 . Effect of bovine soma‐totropin administration during the last trimester of gestation on maternal growth, and foetal and placental development in primigravid ewes . Animal production , 58 : 87 – 94 .
  • Van Landeghem , A. A. J. and van de Wiel , D. F. M. 1978 . Radioimmunoassay for porcine prolactin: plasma levels during lactation, suckling and weaning and after TRH administration . Ada endo‐crinologica , 88 : 653 – 667 .
  • Weaver , D. R. and Reppert , S. M. 1986 . Maternal melatonin communicates daylength to the fetus in Djungarian Hamsters . Endocrinology , 119 : 2861 – 2863 .

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