Effect of season on seminal traits and serum hormone concentrations in captive male Siberian tigers (Panthera tigris)
| Autor: | Ulysses S. Seal, Ronald Tilson, A. G. Hunter, A. P. Byers, E. F. Graham |
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| Rok vydání: | 1990 |
| Předmět: |
Male
Thyroid Hormones endocrine system Embryology media_common.quotation_subject Carnivora Cell Count Semen Biology Semen quality Endocrinology Animal science Capacitation Seasonal breeder Animals Testosterone media_common Sperm-Ovum Interactions Triiodothyronine Ecology Acid phosphatase Obstetrics and Gynecology Cell Biology Spermatozoa Thyroxine Reproductive Medicine Sperm Motility biology.protein Animals Zoo Female Seasons Reproduction Sperm Capacitation Hormone |
| Zdroj: | Reproduction. 90:119-125 |
| ISSN: | 1741-7899 1470-1626 |
| DOI: | 10.1530/jrf.0.0900119 |
| Popis: | Electroejaculates and serum samples were collected throughout the year from 5 male Siberian tigers. Semen quality, seminal plasma chemistry and serum hormone concentrations were evaluated and analysed as a function of season. Semen volume, concentration, motility, viability and morphology were not influenced by season. The ability of spermatozoa to undergo capacitation and penetrate zona-free hamster eggs did not differ due to season. Season had no influence on seminal plasma concentrations of acid phosphatase, calcium, glucose, potassium and phosphorus. Serum values of thyroxine and triiodothyronine were lowest (P = 0.002 and P = 0.03, respectively) during the summer months while cortisol showed no seasonal variation. Serum testosterone concentrations were higher in fall and early winter (P less than 0.001) than at other times of the year but were not correlated with semen quality. These results demonstrate that season has no effect on the semen production and quality of captive male Siberian tigers. |
| Databáze: | OpenAIRE |
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