Enriquecimento ambiental sonoro para matrizes suínas em sistema cobre e solta e convencional

Abstract

The research was conducted with the objective of evaluating the effects of environmental sound enrichment (music therapy) during the stages of pregnancy and lactation of swine matrices in two housing systems after artificial insemination (Conventional and Group house). 56 sows of commercial lineage between 2º and 6º calving order were used, distributed in a randomized block design in a 2x2 factorial scheme in the treatments: Group house - Music (GH-M), Conventional - Music (CV M), Group house - Control (GH-C), Conventional - Control (CV-C). The matrices were exposed during the entire gestation and lactation phase to six hours of classical music daily (Bach symphonies), reproduced in two-hour periods, followed by a two hour interval. Reproductive indices, superficial body temperature (ST) and ocular (OT), behavior of sows and piglets at weaning were evaluated. Piglets from sows submitted to music therapy, regardless of the type of housing, during the gestation phase, were heavier weaned (P <0.05). The OT of pregnant sows housed in a group house system was lower in relation to those housed in a conventional system. Pregnant and lactating sows exposed to music therapy had lower OT compared to those who did not have access to the same sound stimulus (P <0.05). In both phases, regardless of the evaluated housing system (CS or C), females submitted to music therapy had a lower incidence of agonistic and stereotyped behaviors and greater social interaction with other sows and their piglets in relation to those of the control groups (P <0,05), in addition to a higher frequency of breastfeeding of their offspring. Piglets from sows of the GH-M treatment, vocalized less and showed better results in the human interaction test (P <0.05). Music therapy for pregnant and lactating sows provides stress reduction, greater weight at weaning piglets, and helps them to be more confident in the face of adverse situations.