Indication that the presence of older conspecifics reduces agonistic behaviour in piglets at weaning - Morrone, Beatrice; Bernardino, Thiago; Tatemoto, Patricia; Rodrigues, Frederico Augusto Mazzocca Lopes; Moraes, José Evandro de; Cruz, Thiago Dorsa Almeida da; Zanella, Adroaldo José (Applied Animal Behaviour Science, 2021)