Observations of tabanid feeding on mares and foals.

This research investigates the behavior of tabanid flies feeding on mares and foals. Observations show that foals encounter substantially fewer instances of tabanids feeding on them as compared to mares, which may serve as a protective mechanism against pathogens transmitted by these flies like the equine infectious anemia virus.

Study Background

• The researchers conducted observations of the occurrence of tabanid feeding between mares and foals. Tabanid flies are known disease vectors and can be harmful to both mature horses (mares) and young horses (foals).
• The aim of the study was to understand the distribution and impact of tabanid feeding in horses and if differences existed between the two groups, mares and foals.

Methods and Observations

• The observations were made while the mares and foals were freely moving within a pasture situation. This was likely done to closely simulate their natural environment and behaviors.
• The study recorded that foals had a significantly lower instance of tabanid feeding occurrences compared to the mares, with only 2.43% (4 flies in 77 observations vs 297 flies in 139 observations) of the tabanid feeding instances of the mares.

Findings related to Tabanid Burden

• The study found that the difference in tabanid burden between mares and foals varied due to multiple factors such as herd size, herd location, and the species of the tabanids.
• The details of how these factors influenced the tabanid burden were not mentioned in the abstract, and could be clarified by the full research study.

Implications of the Findings

• From the observed differences in tabanid feeding, the researchers suggest that the lower tabanid burden of foals may serve as a practical protective mechanism against diseases that are mechanically transmitted by tabanids.
• One such potential disease is the equine infectious anemia virus, a serious and incurable viral disease of horses.
• The research implies that understanding tabanids’ feeding habits and preferences could provide practical implications in safeguarding the health of foals and mares.