[The role of herdsman in sow weaning [animal welfare; behaviour]]

abortion aborto aggressive behaviour agricultural workers allevamento degli animali animal embryos animal husbandry animal welfare avortement bien-être animal bienestar animal cage cages cerdas communication animale communication between animals comportamento aggressivo comportamento sociale comportamiento agresivo comportamiento social comportement agressif comportement social comunicación entre animales destete embriones animales embrioni animali embryon animal estres gabbie ganadería gestación gestation gravidanza jaulas lavado lavage lavaggio lavoratori agricoli obreros agrícolas ova ovule parto parturition pregnancy scrofe sevrage social behaviour sows stress svezzamento travailleur agricole truie washing weaning élevage óvulo