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Relationship between milk intensity and pituitary-thyroid function in water buffaloes

Published online by Cambridge University Press:  27 March 2009

G. A. Hassan ,
F. D. El-Nouty  and
M. H. Salem
G. A. Hassan
Affiliation:
Department of Animal Production, Faculty of Agriculture and University of Alexandria Research Centre (UNARC) Alexandria University, Alexandria, Egypt
F. D. El-Nouty
Affiliation:
Department of Animal Production, Faculty of Agriculture and University of Alexandria Research Centre (UNARC) Alexandria University, Alexandria, Egypt
M. H. Salem
Affiliation:
Department of Animal Production, Faculty of Agriculture and University of Alexandria Research Centre (UNARC) Alexandria University, Alexandria, Egypt
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Extract

Water buffaloes (Bubalus bubalis) are reared in many tropical and subtropical countries for meat and milk production and to serve as draught animals. The improvement of milk yield in water buffaloes has been handicapped by the absence of physiological data that may provide means of rapid genetic improvement. Endocrine function is known to vary with lactation intensity. Thyroid hormones seem to have a stimulatory effect on the metabolic rate and, consequently, on the productivity of dairy animals (Lenon & Mixner, 1957; Picha, Pichova & Karasek, 1970; Swanson, 1972). Anderson (1969) also reported an increase in thyroid activity in lactating cows and rats, although other investigators (Johnson & Vanjonack, 1976; Hart et al. 1978; Hart, Bines & Morant, 1979) reported that lactation induced a decline in plasma thyroid hormones. None of these studies performed measurement of plasma thyroid stimulating hormone.

Type
Short Notes
Information
The Journal of Agricultural Science , Volume 104 , Issue 2 , April 1985 , pp. 473 - 475
Copyright
Copyright © Cambridge University Press 1985

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