What question did this study set out to answer?

To examine how long-term thrice-daily milking alters milk yield, cell population dynamics, and mammary enzyme activities in lactating goats.

February 1, 1987Journal of Animal Science

Effects of Long-Term Thrice-Daily Milking on Mammary Enzyme Activity, Cell Population and Milk Yield in the Goat1

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Authors

CWC WildeNew York University Press AHAlan J. HendersonScottish Environment Protection Agency CKChristopher H. KnightHannah Research Foundation

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Implication

Controlled trial demonstrates increased milk yield and enhanced mammary enzyme activity in lactating goats, indicating dynamic cellular mechanisms drive milking-frequency responses.

Key Points

To examine how long-term thrice-daily milking alters milk yield, cell population dynamics, and mammary enzyme activities in lactating goats.
Conducted two experiments in lactating goats starting 2 to 5 weeks postpartum, using unilateral thrice-daily milking for 13 or 37 weeks with the contralateral gland milked twice daily as a within-animal control.
Quantified mammary RNA, DNA, cell proliferation rates, and enzyme activities per cell using tissue biopsies at 9 to 10 days and end-of-study glandular assays at 13 and 37 weeks.
Thrice-daily milking significantly increased milk yield across both experimental cohorts compared to twice-daily milking.
At 37 weeks of thrice-daily milking, the treated gland had significantly higher amounts of RNA and DNA, higher cell proliferation rates, and elevated enzyme activities per cell (P < .05).
Biopsies at 9 to 10 days showed increased enzyme activities per cell in thrice-milked glands, whereas at 13 weeks, DNA content and enzyme activity per cell equalized between glands despite persistent milk yield advantages.

Cite This Study

Wilde et al. (1987) studied this question.

synapsesocial.com/papers/6a7ad27ca51ded8e7b32eb6a https://doi.org/10.2527/jas1987.642533x

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Implication

Controlled trial demonstrates increased milk yield and enhanced mammary enzyme activity in lactating goats, indicating dynamic cellular mechanisms drive milking-frequency responses.

Effects of Long-Term Thrice-Daily Milking on Mammary Enzyme Activity, Cell Population and Milk Yield in the Goat1

Discussion

Member takes

Implication

Key Points

Cite This Study

Effects of Long-Term Thrice-Daily Milking on Mammary Enzyme Activity, Cell Population and Milk Yield in the Goat1

Discussion

Member takes

Implication

Key Points

Cite This Study

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