The effect of environment on behavioural activity, ACTH, beta-endorphin and cortisol in pre-farrowing gilts

behaviour blood cama (animales) case de mise bas cerdas comportamiento comportement corticotropin corticotropina corticotropine endorfinas endorphine endorphins farrowing farrowing crates farrowing pens gilts glucocorticoides glucocorticoids hydrocortisone litter for animals nesting nidification parto parturition piggeries pocilga porcherie sang sangre sows truie