Effect of feeding a DHA-enriched nutriceutical on the quality of fresh, cooled and frozen stallion semen.

The research study investigates the impact of DHA-rich nutriceutical diet on the quality of fresh, cooled, and frozen stallion semen. The findings suggest that the nutriceutical may improve the motion characteristics of stored stallion semen and is especially beneficial for stallions of marginal fertility.

Research Methodology

• The study involved a 2 x 2 crossover design where eight stallions were divided into two treatment groups with 4 stallions each.
• Each group was fed a specific diet. One was given a regular diet (control group) while the other was given a DHA-enriched nutriceutical along with their regular diet.
• The diet plans were carried out over a 14-week feeding trial period, followed by a 14-week washout period, after which the treatment groups were switched and the trials conducted again.

Findings of the Study

• The diet supplemented with the DHA-enriched nutriceutical led to a three-fold increase in semen DHA levels and a 50% increase in the ratio of DHA to DPA level in semen.
• While no differences were observed in sperm motion characteristics in fresh semen, the researchers found improvements in the velocity and trajectory of sperm from stallions fed the nutriceutical after 24 hours of cool storage.
• After 48 hours of storage, the semen samples showed increases in total, progressive, and rapid motility in the group fed nutriceutical.
• For a specific subset of stallions with progressive sperm motility of less than 40% after 24 hours of storage on a controlled diet, the DHA nutriceutical led to significant improvements in sperm motility.

Conclusions and Implications

• The study concludes that feeding stallions with a DHA-enriched nutriceutical could potentially improve the motion characteristics of cooled and stored semen.
• This could be particularly beneficial for stallions with marginal fertility rates, whose sperm quality drops significantly during the process of cooling and storage.
• Further improvements could potentially be achieved by modifying the main fat content of the diet, along with Nutriceutical supplementation.
• The nutriceutical seemed to improve not only the quality of sperm but also its freezability, thus indicating potential benefits in cryopreservation techniques.