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We tested the hypothesis that elevated levels of melatonin in lactating sheep, simulated either by short-day conditions or by melatonin implants, would decrease milk yield while disturbing the rhythm of prolactin (PRL) and growth-hormone (GH) secretion. Eight weeks after lambing, lambs were weaned, and the ewes were subsequently used for milking. The ewes were divided into three groups: (i) long-day...
Heat stress had been a constant challenge to goat farming under tropical climate as more chance exist for exposure to solar radiation for most of the day while grazing with exaggeration by nutritional constraints. Menacing global rise in surface temperature compelled more focus of research over mitigation of heat stress. With 6 female goats of uniform age and weight experimental group (n=6) and were...
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