Iodine nutrition in ewes. 2. Effects of low to high iodine intake by ewes on the iodide content of biological fluids and plasma immunoglobulins G in newborn lambs [dietary iodine, iodide in plasma, thyroxine, triiodothyronine]

agneau alimentacion complementaria birth weight brebis cordero ewes gain de poids ganancia de peso hormonas de la tiroide iode iodine lambs mortalidad mortalite mortality oveja peso al nacimiento supplementary feeding thyroid hormones weight gain yodo