Milk yield, oxytocin and β-endorphin gradually normalize during repeated milking in unfamiliar surroundings
نویسندگان
چکیده
منابع مشابه
Inhibition of oxytocin release during repeated milking in unfamiliar surroundings: the importance of opioids and adrenal cortex sensitivity.
The aim of this study was to test if the opioid antagonist naloxone has a beneficial effect on normalization of oxytocin (OT) release during repeated milking of cows in unfamiliar surroundings. One control milking without naloxone treatment in all cows was performed in the familiar parlour. For four successive evening milkings, cows were transported to, and milked in, the operating theatre of t...
متن کاملNormal and disturbed milk ejection in dairy cows.
More than 80% of the milk stored in the udder, i.e. the alveolar fraction, only available after milk ejection is induced by the release of oxytocin and myoepithelial contraction. Milk ejection is induced by tactile teat stimulation, either manually or by the milking machine. The time from the start of a tactile stimulation until the occurrence of milk ejection spans from 40 s up to more than 2 ...
متن کاملMilking lactating mares using oxytocin : milk volume and composition
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A method of simulating individual cow milk yield per milking as a function of herd milk yield and month was formulated for milking parlor simulation models. Milk yield per milking was modeled for each month in three herd milk yield categories: 8165, 8845, and 9525 kg/yr of milk per cow. Actual individual cow DHIA test day milk weight data for three Florida dairy herds in each herd milk yield ca...
متن کاملMilk yield and mammary growth effects due to increased milking frequency during early lactation.
Increased milking frequency (IMF) at the beginning of lactation has been shown to increase milk yield not only during IMF but also after its cessation. The objectives of this experiment evaluated the effects of increased milking frequency initiated during early lactation on mammary growth and effects on milk yield (MY). Thirty-one cows were divided into treatment groups: 1) 2X: cows milked twic...
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ژورنال
عنوان ژورنال: Journal of Dairy Research
سال: 1996
ISSN: 0022-0299,1469-7629
DOI: 10.1017/s0022029900031691