Tropical summer induces DNA fragmentation in boar spermatozoa : implications for evaluating seasonal infertility

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dc.contributor.author Peña, Santiago T.
dc.contributor.author Stone, Felicity
dc.contributor.author Gummow, Bruce
dc.contributor.author Parker, Anthony J.
dc.contributor.author Paris, Damien B.B.P.
dc.date.accessioned 2019-01-24T12:10:48Z
dc.date.available 2019-01-24T12:10:48Z
dc.date.issued 2019
dc.description.abstract Summer infertility continues to undermine pig productivity, costing the pig industry millions in annual losses. The boar's 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. en_ZA
dc.description.department Production Animal Studies en_ZA
dc.description.librarian hj2019 en_ZA
dc.description.sponsorship A JCU Development Grant to D. P. and by College of Public Health, Medical and Veterinary Sciences PhD Research Funds to S. P., who is also supported by the Australia Awards Scholarship. en_ZA
dc.description.uri http://www.publish.csiro.au/rd en_ZA
dc.identifier.citation Peña, S.T., Stone, F., Gummow, B. et al. 2019, 'Tropical summer induces DNA fragmentation in boar spermatozoa: implications for evaluating seasonal infertility', Reproduction Fertility and Development, NYP. en_ZA
dc.identifier.issn 1031-3613 (print)
dc.identifier.issn 1448-5990 (online)
dc.identifier.other 10.1071/RD18159
dc.identifier.uri http://hdl.handle.net/2263/68235
dc.language.iso en en_ZA
dc.publisher CSIRO Publishing en_ZA
dc.rights © CSIRO 2018 Open Access CC BY-NC-ND. en_ZA
dc.subject DNA damage en_ZA
dc.subject Heat stress en_ZA
dc.subject Oxidative stress en_ZA
dc.subject Pigs en_ZA
dc.subject Summer infertility en_ZA
dc.subject TUNEL en_ZA
dc.title Tropical summer induces DNA fragmentation in boar spermatozoa : implications for evaluating seasonal infertility en_ZA
dc.type Postprint Article en_ZA


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