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Omitting the dry period between lactations does not reduce subsequent milk production in goats

Published online by Cambridge University Press:  01 June 2009

Paul A. Fowler ,
Christopher H. Knight  and
Margaret A. Foster
Paul A. Fowler
Affiliation:
Department of Biomedical Physics, University of Aberdeen, Aberdeen AB9 2ZD, UK
Christopher H. Knight
Affiliation:
Hannah Research Institute, Ayr KA6 5HL, UK
Margaret A. Foster
Affiliation:
Department of Biomedical Physics, University of Aberdeen, Aberdeen AB9 2ZD, UK
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Summary

Four goats were studied from the end of their second lactation. One mammary gland of each goat was dried off just prior to the start of the third gestation, whilst the other gland was milked throughout gestation, with no dry period. At the end of gestation the continuously milked gland was significantly smaller than the gland that had been allowed a dry period. However, this difference did not persist beyond parturition and there was no significant difference between the milk yields of the two glands in the next lactation, although the continuously milked gland tended to have the higher yield. At 18 weeks of lactation, mammary parenchyma weight and secretory cell number were significantly greater in the continuously milked gland, but mammary enzyme activities did not differ between the two glands.

Type
Original articles
Information
Journal of Dairy Research , Volume 58 , Issue 1 , February 1991 , pp. 13 - 19
Copyright
Copyright © Proprietors of Journal of Dairy Research 1991

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References

REFERENCES

Coppock, C. E., Everett, R. W., Natzke, R. P. & Ainslie, H. R. 1974 Effect of dry period length on Holstein milk production and selected disorders at parturition. Journal of Dairy Science 57 712–718CrossRefGoogle Scholar
Fowler, P. A., Knight, C. H., Cameron, G. G. & Foster, M. A. 1990 a Use of magnetic resonance imaging in the study of goat mammary glands in vivo. Journal of Reproduction and Fertility 89 359–366CrossRefGoogle Scholar
Fowler, P. A., Knight, C. H., Cameron, G. G. & Foster, M. A. 1990 b In-vivo studies of mammary development in the goat using magnetic resonance imaging (MRI). Journal of Reproduction and Fertility 89 307–375Google ScholarPubMed
Hamann, J. & Reichmuth, J. 1990 Compensatory milk production within the bovine udder: effects of short-term non-milking of single quarters. Journal of Dairy Research 57 17–22CrossRefGoogle ScholarPubMed
Henderson, A. J. & Peaker, M. 1983 Compensatory increases in milk secretion in response to unilateral inhibition by colchicine during lactation in the goat. Journal of Physiology 334 433–440CrossRefGoogle ScholarPubMed
Knight, C. H. 1987 Compensatory changes in mammary development and function after hemimastectomy in lactating goats. Journal of Reproduction and Fertility 79 343–352CrossRefGoogle ScholarPubMed
Knight, C. H. & Peaker, M. 1982 Mammary cell proliferation in mice during pregnancy and lactation in relation to milk yield. Quarterly Journal of Experimental Physiology 67 165–177CrossRefGoogle ScholarPubMed
Knight, C. H. & Peaker, M. 1984 Mammary development and regression during lactation in goats in relation to milk secretion. Quarterly Journal of Experimental Physiology 69, 331–338CrossRefGoogle ScholarPubMed
Knight, C. H. & Wilde, C. J. 1988 Milk production in concurrently pregnant and lactating goats mated out of season. Journal of Dairy Research 55 487–493CrossRefGoogle ScholarPubMed
Linzell, J. L. 1973 Innate seasonal oscillations in the rate of milk secretion in goats. Journal of Physiology 230 225–233CrossRefGoogle ScholarPubMed
Mackenzie, D. 1967 Goat Husbandry 2nd ednLondon: Faber & FaberGoogle Scholar
O'Connor, J. J. & Oltenacu, P. A. 1988 Determination of optimum drying off time for dairy cows using decision analysis and computer simulation. Journal of Dairy Science 71 3080–3091CrossRefGoogle Scholar
Pitkow, H. S., Reece, R. P. & Waszilycsak, G. L. 1972 The integrity of mammary alveolar cells in two consecutive lactations. Proceedings of the Society for Experimental Biology and Medicine 139 845–850CrossRefGoogle ScholarPubMed
Smith, A., Wheelock, J. V. & Dodd, F. H. 1907 The effect of milking throughout pregnancy on milk secretion in the succeeding lactation. Journal of Dairy Research 34 145–150CrossRefGoogle Scholar
Smith, V. R. 1959 Physiology of Lactation 5th edn.Ames, IA: Iowa State University PressGoogle Scholar
Swanson, E. W. 1965 Comparing continuous milking with sixty-day dry periods in successive lactations. Journal of Dairy Science 48 1205–1209CrossRefGoogle ScholarPubMed
Swanson, E. W., Pardue, F. E. & Longmire, D. B. 1967 Effect of gestation and dry period on deoxyribomicleic acid and alveolar characteristies of bovine mammary glands. Journal of Dairy Science 50 1288–1292CrossRefGoogle Scholar
Wilde, C. J., Blatchford, D. R., Knight, C. H. & Peaker, M. 1989 Metabolic adaptations in goat mammary tissue during long-term incomplete milking. Journal of Dairy Research 56 7–15CrossRefGoogle ScholarPubMed
Wilde, C. J., Henderson, A. J. & Knight, C. H. 1986 Metabolic adaptations in goat mammary tissue during pregnancy and lactation. Journal of Reproduction and Fertility 76 289–298CrossRefGoogle ScholarPubMed