[Influence of the age of the mother on the birth and weaning weights of lambs in Junin sheep in the Production Unit Consac of the SAIS Tupac Amaru]

age agneau ancestry animal breeding animal developmental stages ascendance ascendencia birth weight cordero edad etapas del desarrollo animal lambs madre mejoramiento animal mere mothers ovin ovinos peru peso al destete peso al nacimiento poids au sevrage sheep weaning weight