Cortisol Concentration in Horsehair and its Relationship to Body Location, Coat Colour, and Gender.

The research looks into the relationship between cortisol concentrations in horsehair and factors such as body location, coat colour, and gender. It reveals that the body location and coat colour significantly affect cortisol levels, while the gender does not.

Introduction and Methodology

• Studies have shown that the cortisol concentration in animal hair is a useful indicator of chronic stress levels. This method is non-invasive and straightforward, but it comes with some limitations.
• To get a better understanding, researchers collected horse hair samples from 31 horses. The samples were taken from eight different body parts, namely: chest, left and right saddles, right and left thoracic fetlocks, the mane at the withers, just behind the ears, and the tail strand.

Findings

• The study found that the body location from where the hair samples were taken had a significant effect on cortisol concentrations. This suggests that cortisol levels can differ across different body parts.
• Another significant finding was that the colour of the horsehair also affected cortisol levels. There were notable differences in cortisol concentrations in black, white, and brown hair. This tells us that the horsehair’s colour can affect the amount of cortisol it excretes.
• Interestingly, the study found that the sex of the horse didn’t significantly affect cortisol concentrations. This demonstrates that regardless of whether the horse is male or female, the cortisol levels in their hair are expected to be similar.

Implications and Recommendations

• The study’s findings imply that to get accurate cortisol levels, hair samples should be taken from the same body location and should have similar hair colours as these factors can distort results.
• These findings also point out that some of the literature relating to cortisol concentrations is true — particularly relating to factors such as colour and location of the hair sample affecting cortisol concentrations.
• In terms of gender, studies align with the researchers’ findings in that the gender of the animal doesn’t affect cortisol concentrations. This information is crucial in ensuring that future readings are accurate and reliable.