Palermo Mendes Janaina, Ribeiro Caldara Fabiana, de Castro Burbarelli Maria Fernanda, Valentim Jean Kaique, Ferreira de Brito Mandú Daniela, Garófallo Garcia Rodrigo, Correia de Lima Almeida-Paz Ibiara, Markiy Odakura Agnes, Lourenço da Silva Marconi Italo
Animal Science Postgraduate Program, Agricultural Sciences, Federal University of Grande Dourados (UFGD), Dourados 79804-970, MS, Brazil.
Department of Animal Production, School of Veterinary Medicine and Animal Science (FMVZ), São Paulo State University (UNESP), Botucatu 18610-034, SP, Brazil.
Animals (Basel). 2023 Mar 31;13(7):1226. doi: 10.3390/ani13071226.
The research aimed to assess the effects of auditory environmental enrichment on sows in mixed housing (caged until 35 days after insemination and then collective pens) or collective housing (caged until 72 h after insemination and then collective pens). Reproductive performance, body surface and eye temperature (ET) were evaluated as sows' welfare indicators. A sample of 56 sows between 2nd and 6th parity was submitted to the treatments from artificial insemination to weaning. The sows were assigned in a randomized block design with a 2 × 2 factorial scheme of treatments: mixed housing-control (MH-C), collective housing-control (CH-C), mixed housing-music (MH-M) and collective housing-music (CH-M). Auditory enrichment consisted of exposing sows daily throughout gestation and lactation to 6 h of classical music divided into 2 h periods. The ET of pregnant sows in collective housing was lower than that of sows in mixed housing (33.77 °C vs. 34.91 °C). Pregnant and lactating sows exposed to auditory environmental enrichment exhibited lower ET compared to those that had no access to the stimulus (pregnant 33.36 °C vs. 34.32 °C and lactating 34.21 °C vs. 34.83 °C). No housing type effect was found on the reproductive performance parameter; however, piglets from sows submitted to auditory environmental enrichment, regardless of the type of housing during gestation, were heavier at weaning (6.32 kg vs. 5.57 kg). Collective or mixed housing does not affect sows' reproductive performance; perhaps, auditory environmental enrichment reduced stress in the gestation and lactation phases and provided greater piglet weight gain at weaning.
该研究旨在评估听觉环境丰富化对混合饲养（配种后35天内单笼饲养，之后转入集体围栏）或集体饲养（配种后72小时内单笼饲养，之后转入集体围栏）的母猪的影响。将繁殖性能、体表温度和眼温（ET）作为母猪福利指标进行评估。选取56头处于第2至第6胎次的母猪，从人工授精至断奶进行相应处理。母猪采用随机区组设计，按2×2析因处理方案分组：混合饲养-对照（MH-C）、集体饲养-对照（CH-C）、混合饲养-音乐（MH-M）和集体饲养-音乐（CH-M）。听觉丰富化措施包括在整个妊娠期和哺乳期每天让母猪接触6小时古典音乐，每次2小时。集体饲养的怀孕母猪的眼温低于混合饲养的母猪（33.77℃对34.91℃）。与未接触该刺激的母猪相比，接触听觉环境丰富化的怀孕和哺乳母猪的眼温较低（怀孕母猪：33.36℃对34.32℃；哺乳母猪：34.21℃对34.83℃）。未发现饲养方式对繁殖性能参数有影响；然而，无论妊娠期的饲养方式如何，接受听觉环境丰富化处理的母猪所产仔猪在断奶时体重更重（6.32千克对5.57千克）。集体饲养或混合饲养不影响母猪的繁殖性能；或许，听觉环境丰富化减轻了妊娠和哺乳期的应激，并使仔猪在断奶时体重增加更多。
