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Teat orifice stretchability associated with teat diameter gradient and milk yield in lactating cows

Published online by Cambridge University Press:  02 September 2010

A. K. Rathore  and
R. F. Sheldrake
A. K. Rathore
Affiliation:
Dairy Research Centre, Richmond, New South Wales 2753, Australia
R. F. Sheldrake
Affiliation:
Veterinary Research Station, Glenfield, New South Wales, Australia
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Summary

Teat canal stretchability was measured on 119 lactating cows from two dairy farms, using a probe. Diameter of one hind teat was measured by calipers at the proximal end of the teat and 20 mm above its distal end. Teat canal stretchability, teat diameter at the proximal end and teat diameter gradient were highly correlated with milk yield. Cows with higher teat diameter gradient (i.e., funnel-shaped teats) had higher teat canal stretchability values compared with the cows with lower teat gradient values (i.e., cylindrical teats). Stretchability of the hind teat canal was significantly greater than the stretchability of the fore teat canal.

Type
Research Article
Information
Animal Production , Volume 24 , Issue 2 , April 1977 , pp. 215 - 220
Copyright
Copyright © British Society of Animal Science 1977

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References

REFERENCES

Andreae, U. 1955. [Measurement of milk flow from cows' udders in investigating ease of milking.] Züchtungskunde 27: 238–244.Google Scholar
Bull, L. B., Murnane, D., Munch-Petersen, E., MacLean, J. D. and Clark, S. E. R. 1940. Studies on bovine mastitis. 1. Study of an experimental herd. Bull. Court. scient. ind. Res., Melb., No. 134.Google Scholar
Elliott, C. S. and Graf, G. C. 1972. Milk flow rates of individual quarters of dairy cows. Dairy Sci. 55: 1692–1697.CrossRefGoogle Scholar
Hickman, C. G. 1964. Teat shape and size in relation to production characteristics and mastitis in dairy cattle. J. Dairy Sci. 47: 777–782.CrossRefGoogle Scholar
Johansson, I. 1961. Genetic Aspects of Dairy Cattle Breeding. Oliver and Boyd, Edinburgh.Google Scholar
Johnston, T. 1938. Anatomical and experimental study of the teat of the cow with particular reference to streptococcal mastitis. J. comp. Path. Ther. 51: 69–77.CrossRefGoogle Scholar
McDonald, J. S. 1968a. Radiographic method for anatomic study of the teat canal: changes with lactation age. Am. J. vet. Res. 29: 1207–1210.Google ScholarPubMed
McDonald, J. S. 1968b. Radiographic method for anatomic study of the teat canal: observations on 22 lactating dairy cows. Am. J. vet. Res. 29: 1315–1319.Google ScholarPubMed
McDonald, J. S. 1975. Radiographic method for anatomic study of the teat canal: changes between milking periods. Am. J. vet. Res. 36: 1241–1242.Google ScholarPubMed
Murphy, J. M. 1944. The relationship of teat patency to udder infection. Cornell Vet. 34: 64–68.Google Scholar
Rathore, A. K. 1976a. Sources of variation in the milk flow rate and its relationships with milk yield, milk composition, age and stage of lactation in dairy cows. Br. vet. J. 132: 90–94.CrossRefGoogle ScholarPubMed
Rathore, A. K. 1976b. Relationships between teat shape, production and mastitis in Friesian cows. Br. vet. J. 132: 389–392.CrossRefGoogle ScholarPubMed
Stuart, P. and Lancaster, J. E. 1949. Some factors which may be concerned in the susceptibility of the bovine udder to Str. agalactiae infection. J. comp. Path. Ther. 59: 31–41.CrossRefGoogle ScholarPubMed
Thomas, C. L., Neave, F. K., Dodd, F. H. and Higgs, T. M. 1972. The susceptibility of milked and unmilked udder quarters to intramammary infection. J. Dairy Res. 39: 113–131.CrossRefGoogle Scholar