Abstract
The purpose of this study was to determine if the quality of stored stallion semen doses could be enhanced by the scaled-up version of Single Layer Centrifugation using Androcoll-E-Large. Three semen doses from each of fifteen stallions were transported overnight to the Swedish University of Agricultural Sciences (SLU) for processing 24 h after semen collection. Sperm quality in the resulting SLC-selected samples was significantly improved compared to the uncentrifuged samples: mean progressive motility was increased by 8% on the day of processing (P < 0.001) and by 13% after 24 h cold storage (P < 0.001), normal morphology was increased by 4% (P < 0.01), whereas mean %DFI was decreased by 2% (P < 0.001). When these SLC-selected samples were compared retrospectively to fresh samples processed by SLC with Androcoll-E Small, sperm quality was found to be similar, although it was not maintained for as long in the sperm samples stored before SLC. These results suggest an additional option for improving sperm quality in stallion semen doses for artificial insemination.
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