Female rainbow trout urine contains a pheromone which causes a rapid rise in plasma 17,20β-dihydroxy-4-pregnen-3-one levels and milt amounts in males
| Autor: | E. L. M. Vermeirssen, N. R. Liley, Alexander P. Scott |
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| Rok vydání: | 1997 |
| Předmět: |
Milt
medicine.medical_specialty biology medicine.drug_class Urinary system media_common.quotation_subject Urine Aquatic Science biology.organism_classification Trout Endocrinology Internal medicine medicine Rainbow trout Gonadotropin Reproduction Ecology Evolution Behavior and Systematics Testosterone media_common |
| Zdroj: | Journal of Fish Biology. 50:107-119 |
| ISSN: | 0022-1112 |
| DOI: | 10.1111/j.1095-8649.1997.tb01343.x |
| Popis: | Previous studies have shown that spermiating male rainbow trout respond to the presence of female urine in the water with significant increases in plasma levels of gonadotrophin II, 17,20β-dihydroxy-4-pregnen-3-one (17,20β-P) and testosterone. The present results show that males only need a single brief exposure to female urine in order to respond; levels of 17,20β-P rise significantly within 1 h of exposure, and peak between 3 and 4 h. Also, milt amounts increase significantly following exposure of males to female urine. Levels of 17,20β-P are also related positively to the amount of female urine to which the males are exposed. Furthermore, when live females are placed, out of physical and visual contact, in the same tank as males, levels of 17,20β-P rise in the same way as in males which are exposed to female urine. However, if females are fitted with urinary catheters (which drain the urine outside the tank), males respond more slowly. These results indicate that urine is the main source of the male ‘priming’ pheromone. |
| Databáze: | OpenAIRE |
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