CHARACTERISTICS OF STALLIONS IN NOVEL AND IN ROUTINE SEMEN COLLECTION SITES, WITH OR WITHOUT RESTRAINT
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abstract
To evaluate effects of semen collection in a routine collection shed and in an outside pen, with or without a restraint, on stallion semen characteristics, twenty-six 3 to 21 year-old stallions were randomly assigned to one of four treatments over two experimental periods (May 17 to 24 and June 13 to 20), 20 days apart. Semen was collected from Group I stallions in a collection shed and with the use of a restraint, from Group II stallions in an outside pen along with a restraint, from Group III in a collection shed and without a restraint, and from Group IV in an outside pen and without a restraint. Stallions were on a once, every-other-day semen collection schedule prior to and during the experiment. Gel semen volume was higher (P<0.05; 18 vs 14 ml) while the number of spermatozoa per ejaculate was lower (P<0.05; 8.1 vs 9.3109) for Groups I and III vs Groups II and IV semen collections, respectively. Spermatozoa/ejaculate was higher (P<0.05; 9.1 vs 8.2109) while pH was lower (P<0.05; 7.46 vs 7.57) for restrained vs unrestrained stallion semen collections, respectively. Gel semen volume was higher (P<0.05; 19 vs 14 ml) while pH was lower (P<0.05; 7.41 vs 7.58) for Period 2 vs Period 1 semen collections, respectively. There were significant (P<0.05) first-order period restraint interactions for gel-free and total semen volumes and for spermatozoa per ejaculate. 1991.
