Title page for ETD etd-02182010-020011

Type of Document Master's Thesis
Author Lawson, David Micheal
URN etd-02182010-020011
Title The relationship between plasma oxytocic activity and intramammary pressure in lactating dairy cows.
Degree Master of Science
Department Dairy Science
Advisory Committee
Advisor Name Title
No Advisors Found
  • Oxytocin
Date of Defense 1967-06-05
Availability restricted

The present study was designed to measure levels of oxytocic activity in the blood of cows before, during, and after physical stimulation to the teats and udder. It was also designed to determine the relationship between these levels and intramammary pressure. Knowledge in both these areas has been lacking up to the present. Some information in these areas was obtained as a result of this study.

It was found that a wide variation existed in the levels of oxytocic activity between cows. In most cows, a bulk of oxytocic activity was detected in the interval of one to four minutes after stimulation began. The activity rapidly declined to low levels, with some exceptions, between the third and fourth minute post-stimulation. This information indicates that no specific changes need to be made in the present milking procedures.

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