Testicular thermoregulation, scrotal surface temperature patterns and semen quality of water buffalo bulls reared in a tropical climate
| Autor: | I. M. Franco, J. S. Sousa, Cristian Faturi, A. O. A. Silva, Lílian Kátia Ximenes Silva, J. B. Lourenço Júnior, M. H. A. Pantoja, Alexandre Rossetto Garcia, D. V. Barros, Lucieta Guerreiro Martorano |
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| Rok vydání: | 2017 |
| Předmět: |
Male
endocrine system Hot Temperature Buffaloes Urology Wet-bulb globe temperature Semen Biology Andrology 03 medical and health sciences Semen quality 0302 clinical medicine Endocrinology Animal science Scrotum Testis medicine Animals Spermatogenesis Epididymis Tropical Climate 030219 obstetrics & reproductive medicine urogenital system 0402 animal and dairy science Humidity 04 agricultural and veterinary sciences General Medicine Thermoregulation 040201 dairy & animal science Sperm Semen Analysis Sperm Maturation medicine.anatomical_structure Seasons Body Temperature Regulation |
| Zdroj: | Andrologia. 50(2) |
| ISSN: | 1439-0272 |
| Popis: | This study evaluated the capacity of thermoregulation and its consequences on the scrotal surface temperature patterns and semen quality of buffalo bulls raised in a wet tropical climate. Eleven water buffaloes were evaluated in the rainiest, in the transitional and in the less rainy season. Air temperature and humidity were consistently high, but the animals did not show thermal stress in any season. The scrotal temperature gradient of buffalo bulls using infrared thermography was described, and three parallel and decreasing thermal bands were characterised. Sperm quality (n = 176 ejaculates) was maintained in normal parameters over the periods. Pearson's coefficients showed that sperm volume and progressive motility were negatively correlated with ocular globe, epididymal tail and minimum scrotal temperatures (p < .01). Sperm membrane integrity was negatively influenced by increases in epididymal tail and minimum scrotal temperatures (p < .01). Ocular globe temperature also showed positive correlation with rectal, spermatic cord, and epididymal tail temperatures (p < .01). Therefore, even under high temperature and humidity, the thermoregulatory system was effective in preventing heat stress and the normality of scrotal surface temperatures, spermatogenesis and sperm maturation were maintained. |
| Databáze: | OpenAIRE |
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