Effect of an increase in environmental temperature on testicular androgenesis and spermatogenesis in toad (Bufo melanostictus) during hibernating season
| Autor: | Jogendra Mohan Debnath, Saswati Parua Mondal, Debidas Ghosh |
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| Rok vydání: | 2010 |
| Předmět: |
Hibernation
Male endocrine system medicine.medical_specialty Toad Andrology Environmental temperature Internal medicine biology.animal Testis medicine Animals Bufo melanostictus Spermatogenesis Gametogenesis Testosterone biology urogenital system Temperature General Medicine Plasma levels biology.organism_classification Spermatozoa Bufonidae Endocrinology Animal Science and Zoology Seasons |
| Zdroj: | Zoo biology. 30(6) |
| ISSN: | 1098-2361 |
| Popis: | Activities of key testicular androgenic enzymes [Δ5, 3β-hydroxysteroid dehydrogenase (Δ5, 3β-HSD) and 17β-hydroxysteroid dehydrogenase (17β-HSD)], plasma levels of testosterone, and testicular gametogenic activities were studied in heat-exposed adult male toads during hibernating season for two consecutive years. Exposure of toads to an elevated environmental temperature for 14 and 21 days resulted in significant elevation of testicular Δ5, 3β-HSD and 17β-HSD activities, along with plasma levels of testosterone. Testicular gametogenic activity, by means of quantity of all stages of spermatogenic cycle, were elevated significantly at the same experimental schedule, but 7 days of heat exposure resulted in significant elevation only in stage IV. The results indicated that environmental temperature is an important modulator of breeding activities of male toads. It also demonstrated that testicular activities in seasonally breeding toads are probably not linked to hibernating cycle. Zoo Biol 30:681–688, 2011. © 2010 Wiley Periodicals, Inc. |
| Databáze: | OpenAIRE |
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