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After a control period, the scrotum of seven normospermic adult beagle dogs was insulated with a self\u2010made suspensory for 48\u00a0h. Nine weeks later, two animals were castrated, while in five animals, scrotal hyperthermia was repeated. Dogs were castrated either 10 or 40\u00a0days thereafter. In each phase of scrotal insulation, average scrotal surface temperature increased by 3.0\u00b0C. Semen was collected twice weekly throughout the experiment. Total sperm count did not change after the first hyperthermia, but it slightly decreased after the second (p\u00a0&lt;\u00a00.05). Profiles of sperm morphology and velocity parameters (<jats:styled-content style=\"fixed-case\">CASA<\/jats:styled-content>) rather indicated subtle physiological variations in sperm quality than effects of a local heat stress. Chromatin stability of ejaculated spermatozoa as indicated by <jats:styled-content style=\"fixed-case\">SCSA<\/jats:styled-content> remained constant throughout the experiment. Perfusion characteristics of the gonads, that is, systolic peak velocity, pulsatility and resistance index at the marginal location of the testicular artery, did not change due to hyperthermia (p\u00a0&gt;\u00a00.05). Histological examination of excised testes and epididymides for apoptotic (<jats:styled-content style=\"fixed-case\">TUNEL<\/jats:styled-content> and activated caspase\u20103) and proliferating cells (Ki\u201067 antigen) indicated only marginal effects of scrotal insulation on tissue morphology. In conclusion, a mild short\u2010term scrotal hyperthermia in dogs does not cause substantial changes in sperm quantity and quality. In contrast to other species, canine testes and epididymides may have a higher competence to compensate such thermal stress.<\/jats:p>","DOI":"10.1111\/rda.12244","type":"journal-article","created":{"date-parts":[[2013,11,6]],"date-time":"2013-11-06T07:45:09Z","timestamp":1383723909000},"page":"145-157","source":"Crossref","is-referenced-by-count":30,"title":["Effect of Short\u2010Term Scrotal Hyperthermia on Spermatological Parameters, Testicular Blood Flow and Gonadal Tissue in Dogs"],"prefix":"10.1111","volume":"49","author":[{"given":"H","family":"Henning","sequence":"first","affiliation":[{"name":"Unit for Reproductive Medicine of Clinics University of Veterinary Medicine Hannover Hannover Germany"},{"name":"Clinic for Pigs and Small Ruminants University of Veterinary Medicine Hannover Hannover Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C","family":"Masal","sequence":"additional","affiliation":[{"name":"Unit for Reproductive Medicine of Clinics 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