[Productive and reproductive behaviour of two groups of sheep of the churra badana breed in Mirandela [Portugal]]

accouplement aliment pour animaux brebis copulation endangered species ewe milk ewes feeding frequency feeds frecuencia de las comidas gain de poids ganancia de peso lait de brebis leche de oveja milk yield multipurpose breeds oveja performance de reproduction piensos portugal race mixte razas mixtas rendement laitier rendimiento lechero reproductive performance reproductividad weight gain