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Milk or meat

Published online by Cambridge University Press:  02 September 2010

J.A. Bines  and
I.C. Hart
I.C. Hart
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading, RG2 9AT
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Extract

During lactation, the cow partitions dietary energy between the production of milk and of body tissues. The balance between the two determines whether the cow is primarily a meat producer or a milk producer and the importance of this balance has been emphasized by Broster (1974). Differences between animals in partitioning ability are known to be inherited and are thought to be under endocrine control, but their effects on blood hormone and metabolite levels have not previously been studied. Knowledge and understanding of such differences may permit the early identification of the potentially high-yielding animal for selection purposes and may make possible the manipulation of energy partition towards a desired end.

Type
Research Article
Information
BSAP Occasional Publication , Volume 1: The Use of Blood Metabolites in Animal Production , January 1978 , pp. 87 - 98
Copyright
Copyright © British Society of Animal Production 1978

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References

REFERENCES

Bassett, J.M., Weston, E.H. and Hogan, J.P. 1971. Dietary regulation of plasma insulin and growth hormone concentrations in sheep. Aust. J. biol. Sci. 24: 321–330.CrossRefGoogle ScholarPubMed
Bourne, R.A. and Tucker, H.A. 1975. Serum prolactin and LH responses to photoperiod in bull calves. Endocrinology 97: 473–475.CrossRefGoogle ScholarPubMed
Broster, W.H. 1974. Response of the dairy cow to level of feeding. National Institute for Reseaxch in Dairying, Biennial Reviews: 14–34.Google Scholar
Buttle, H.L. 1974. Seasonal variation of prolactin in plasma of male goats. J. Reprod. Fert. 37: 95–99.CrossRefGoogle ScholarPubMed
Forbes, J.M., Driver, P.M., El Shahat, A.A., Boaz, T.G. and Scanes, C.G. 1975. The effect of daylength and level of feeding on serum prolactin in growing lambs. J. Endocr. 64: 549–554.CrossRefGoogle ScholarPubMed
Hart, I.C. 1973. Effect of 2-bromo-a-ergocryptine on milk yield and the level of prolactin and growth hormone in the blood of the goat at milking. J. Endocr. 57: 179–180.CrossRefGoogle Scholar
Hart, I.C. 1975a. Concentrations of prolactin in serial blood samples from goats before, during and after milking throughout lactation. J. Endocr. 64: 305–312.CrossRefGoogle ScholarPubMed
Hart, I.C. 1975b. Seasonal factors affecting the release of prolactin in goats at milking. J. Endocr. 64: 313–322.CrossRefGoogle ScholarPubMed
Hart, I.C.Bines, J.A., Balch, C.C. and Cowie, A.T. 1975. Hormone and metabolite differences between lactating beef and dairy cows. Life Sci. 16: 1285–1292.CrossRefGoogle Scholar
Hart, I.C.Bines, J.A., Cowie, A.T. and Balch, C.C. 1975. A comparison of hormones and metabolites in the circulation of beef and dairy cattle. J. Endocr. 65: 3P–4P.Google ScholarPubMed
Hove, K. and Blom, A.K. 1973. Plasma insulin and growth hormone in dairy cows: diurnal variation and relation to food intake and plasma sugar and acetoacetate levels. Acta endocr., Copenh. 73: 289–303.Google ScholarPubMed
Hutton, J.B. 1957. The effect of growth hormone on the yield and composition of cows milk. J. Endocr. 16: 115–125.CrossRefGoogle ScholarPubMed
Johke, T. 1970. Factors affecting the plasma prolactin level in the cow and goat as determined by radioimmunoassay. Endocr. jap. 17: 393–401.CrossRefGoogle Scholar
Karg, H., Schams, D. and Reinhardt, V. 1972. Effects of 2-Br-α -ergocryptine on plasma prolactin level and milk yield in cows. Experientia 28: 574–576.CrossRefGoogle Scholar
Koprowski, J.A. and Tucker, H.A. 1973. Bovine serum growth hormone, corticoids and insulin during lactation. Endocrinology 93: 645–651.CrossRefGoogle ScholarPubMed
Lee, Y., Ramachandran, J. and Li, C.H. 1974. Does bovine growth hormone possess rapid lipolytic activity. Archs Biochem. Biophys. 161: 222–226.CrossRefGoogle Scholar
Lorscheider, F.L., Oxender, W.D. and Reineke, E.P. 1969. Serum thyroxine in the lactating rat and cow. Fedn Proc. Fedn Am. Socs exp. Biol. 28: 519.Google Scholar
McAtee, J.W. and Trenkle, A. 1971a. Effect of feeding fasting and infusion of energy substrates on plasma growth hormone levels in cattle. J. Anim. Sci. 33: 612–616.CrossRefGoogle ScholarPubMed
McAtee, J.W. and Trenkle, A. 1971b. Metabolic regulation of plasma insulin levels in cattle. J. Anim. Sci. 33: 438–442.CrossRefGoogle ScholarPubMed
Machlin, L.J. 1973. Effect of growth hormone on milk production and feed utilization in dairy cows. J. Dairy Sci. 56: 575–580.CrossRefGoogle ScholarPubMed
Mams, J.G. and Boda, J.M. 1965. Effects of ovine growth hormone and prolactin on blood glucose, serum insulin, plasma non-esterified fatty acids and amino nitrogen in sheep. Endocrinology 76: 1109–1114.Google Scholar
Pelletier, J. 1973. Evidence for photoperiodic control of prolactin release in rams. J. Reprod. Fert. 35: 143–147.CrossRefGoogle ScholarPubMed
Schams, D. 1972. Prolactin levels in bovine blood, influences by milking manipulation, genital stimulation and oxytocin administration with specific consideration of the seasonal variations. Acta endocr., Copn. 71: 684–696.Google ScholarPubMed
Schams, D. and Reinhardt, V. 1974. Influence of the season on plasma prolactin level in cattle from birth to maturity. Hormone Res. 5: 217–226.CrossRefGoogle ScholarPubMed
Smith, V.G., Beck, T.W., Convey, E.M. and Tucker, H.A. 1974. Bovine serum prolactin, growth hormone, cortisol and milk yield after ergocryptine. Neuroendocrinology 15: 172–181.CrossRefGoogle ScholarPubMed
Swan, H. 1976. The physiological interrelationship of reproduction, lactation and nutrition in the cow. In Principles of Cattle Production Proceedings of the 23rd Easter School in Agricultural Science, University of Nottingham, 1975 (ed. Swan, H. and Broster, W.H.), pp. 85–102. Butterworth, London.Google Scholar
Trenkle, A. 1971. Influence of blood glucose levels on GH secretion in sheep. Proc. Soc. exp. Biol Med. 136: 51–55.CrossRefGoogle Scholar
Van Wyke, J.J., Underwood, L.E., Lister, R.C. and Marshall, R.N. 1973. The somatomedins. Am. J. Pis. Child. 126: 705–711.CrossRefGoogle Scholar
Vezinet, A. 1973. Effect of hypophysectomy and bovine somatotropic hormone treatment on the relative growth of lambs. Annls Biol. anim. Biochim. Biophys. 13: 51–73.CrossRefGoogle Scholar
Wetteman, R.P. and Tucker, H.A. 1974. Relationship of ambient temperature to serum prolactin in heifers. Proc. Soc. exp. Biol Med. 146: 908–911.CrossRefGoogle Scholar
Williams, W.F., Lee, S.D., Head, H.H. ana Lynch, J. 1963. Growth hormone effects on bovine plasma fatty acid concentration and metabolism. J. Dairy Sci. 46: 1405–1408.CrossRefGoogle Scholar