[Effect of the sudden removal of lambs on the blood levels of prolactin, triiodothyronine and thyroxine in ewes].
The effect of the sudden removal of lambs, average age 42 days (36 to 54), on the blood level of PRL, T3 and T4 was checked, using a radioimmunological method, in 18 Sardinian ewes that had lambed in November (10 treated and 8 control). The two groups of animals, reared indoors in different sheep-folds, were subjected to the same management and feeding. Compared to day before the removal of the lambs, the blood PRL showed a sharp decrease which lasted 24 hours. After 4 days of observation, despite two daily milkings, the blood PRL had not returned to the initial levels. On the other hand, T3 and T4 showed an increase that lasted 48 hours, on the third day returning to the initial levels.
Floris
B
B
Istituto di Nutrizione e endocrinologia, Università di Sassari.
Bini
P P
PP
Nuvole
P
P
D000818:Animals; D005260:Female; D007774:Lactation / Q000502:physiology*; D011388:Prolactin / Q000097:blood* / Q000378:metabolism; D012636:Secretory Rate; D012756:Sheep / Q000502:physiology*; D013974:Thyroxine / Q000097:blood* / Q000378:metabolism; D014284:Triiodothyronine / Q000097:blood* / Q000378:metabolism
D014284:Triiodothyronine; D011388:Prolactin; D013974:Thyroxine
Effetto dell'improvvisa sottrazione della prole sul livello ematico di prolattina, tri-iodotironina e tiroxina nella pecora.