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The boar\u2019s inefficient capacity to sweat, non-pendulous scrotum and the extensive use of European breeds in tropical conditions, can make the boar particularly vulnerable to the effects of heat stress; however, the link between summer heat stress and boar sperm DNA damage has not yet been demonstrated. Semen from five Large White boars was collected and evaluated during the early dry, late dry and peak wet seasons to determine the effect of seasonal heat stress on the quality and DNA integrity of boar spermatozoa. DNA damage in spermatozoa during the peak wet was 16-fold greater than during the early dry and nearly 9-fold greater than during the late dry season. Sperm concentration was 1.6-fold lower in the peak wet than early dry whereas no difference was found across several motility parameters as determined by computer-assisted sperm analysis. These results demonstrate that tropical summer (peak wet season) induces DNA damage and reduces concentration without depressing motility in boar spermatozoa, suggesting that traditional methods of evaluating sperm motility may not detect inherently compromised spermatozoa. Boar management strategies (such as antioxidant supplementation) need to be developed to specifically mitigate this problem.<\/jats:p>","DOI":"10.1071\/rd18159","type":"journal-article","created":{"date-parts":[[2018,11,11]],"date-time":"2018-11-11T17:10:41Z","timestamp":1541956241000},"page":"590-601","source":"Crossref","is-referenced-by-count":42,"title":["Tropical summer induces DNA fragmentation in boar spermatozoa: implications for evaluating seasonal infertility"],"prefix":"10.1071","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5981-1225","authenticated-orcid":true,"given":"Santiago T.","family":"Pe\u00f1a","sequence":"first","affiliation":[{"name":"ADiscipline of Biomedical Science, College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Qld 4811, Australia."},{"name":"BDiscipline of Veterinary Science, College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Qld 4811, Australia."},{"name":"CCollege of Veterinary Medicine, Visayas State University, Baybay City, Leyte, Philippines."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Felicity","family":"Stone","sequence":"additional","affiliation":[{"name":"ADiscipline of Biomedical Science, College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Qld 4811, Australia."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bruce","family":"Gummow","sequence":"additional","affiliation":[{"name":"BDiscipline of Veterinary Science, College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Qld 4811, Australia."},{"name":"DFaculty of Veterinary Science, University of Pretoria, Onderstepoort, 0110, South Africa."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anthony J.","family":"Parker","sequence":"additional","affiliation":[{"name":"ECollege of Food, Agricultural and Environmental Sciences, Ohio State University, Wooster, OH 44691, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7329-8985","authenticated-orcid":true,"given":"Damien B. 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