A Preliminary Study Investigating the Influence of Auditory Stimulation on the Occurrence of Nocturnal Equine Sleep-Related Behavior in Stabled Horses.

The research article explores the impact of auditory stimuli, specifically music, on the sleep-related behaviors of horses kept in stables. The study identifies changes in behaviors like ingestion and lateral recumbency, revealing that music seems to have a positive influence on equine sleep.

Research Design and Methodology

• The study was conducted on seven horses kept in the same yard and shared the same daily management routine. These horses were watched over a period of nine nights.
• An infrared CCTV camera system and a predetermined ethogram were tools utilized in this study for recording the behavioral patterns of these horses during the night, specifically between 2030 to 0630.
• The impact of auditory stimuli was tested by alternating periods with and without music. Initially, the horses went two nights without music (Phase A1), followed by exposure to Beethoven’s ninth Symphony music for five nights (Phases B1 and B2), and then returning to silent nights once again for two non-consecutive nights (Phase A2).

Data Analysis and Findings

• Behavioral data analysis was conducted using a general linear model to scrutinize for any significant differences in frequency patterns.
• The study witnessed a significant increase in the frequency of “ingestion” behaviors during periods of exposure to music (Phases B). Simultaneously, there was also a noticeable decrease in the occurrence of “other” behaviors when Phase A1 was compared to all other phases.
• The study used the Wilcoxon signed rank test to indicate significant variations in the frequency of “lateral recumbency” (a sleeping position in horses) between different phases.

Conclusion and Implications

• The study concludes that introducing music to the stabled environment significantly impacts the nocturnal behavior of horses, potentially benefiting equine sleep. Thus, music might be a useful tool for improving the well-being of stabled horses, particularly from a sleep perspective.