Auditory enrichment on facial and physiological responses of Pantaneiro geldings and mares under short-term stress

Vanessa Cristini Sebastião da Fé, Viviane Maria Oliveira dos Santos, Ana Caroline Bini de Lima, Maria Simara Palermo Hernandes, Fabiana Ribeiro Caldara and Marina De Nadai Bonin Gomes

PLOS ONE, 2025, vol. 20, issue 5, 1-25

Abstract: This study aimed to evaluate the effect of auditory stimuli on mares and geldings during social isolation and movement restriction, and their ability to promote the reduction of stress responses. The research was conducted with eight Pantaneiro horses, divided into Experiment I (4 mares) and Experiment II (4 geldings), both experiments were executed equally using a 4x4 Latin square design with experimental (classical, country and new age) and control (no music) treatments. Physiological parameters (heart rate, heart rate variability, respiratory rate, ocular temperature by infrared thermography, and surface temperature by infrared thermometer) and facial expressions (eye closure (AU143), blink (AU145), half blink (AU47), inner brow raiser (AU101), eye white increase (AD1), tongue show (AD19), nostril dilator (AD38), chewing (AD81), ears forward (EAD101), and ear rotator (EAD104)) were assessed throughout the 24 minutes that the animals remained in the restraining stock. In Experiment I, there was a reduction (p

Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0323649

DOI: 10.1371/journal.pone.0323649

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