| Title: | "The significance of olfaction and social cues in milt availability, sexual hormone status, and spawning behavior of male rainbow trout (Oncorhynchus mykiss)" |
| Address: | "Department of Zoophysiology, Uppsala University, Sweden" |
| ISSN/ISBN: | 0016-6480 (Print) 0016-6480 (Linking) |
| Abstract: | "Male rainbow trout orientate to a 'releaser' pheromone emitted by an ovulated female. This chemical signal is not necessary for the completion of spawning behavior: anosmic males spawned as readily as intact males when paired with ovulated females. The amount of 'strippable' milt and plasma concentrations of testosterone (T) and 17 alpha,20 beta-dihydroxy-4-pregnen-3-one (17,20 beta-P) were greater in males paired for 3 hr with ovulated females than in isolated males, or males placed with nonvitellogenic adult females or in all male groups. Milt and plasma T, 17,20 beta-P, and 11-ketotestosterone (11-KT) were reduced in anosmic males paired with ovulated females, indicating the existence of a priming pheromone. Milt, T, 11-KT, and 17,20 beta-P increased in intact males within 4 hr after injection of salmon gonadotrophin-releasing hormone analogue, lyophilized salmon pituitary extract, or homogenized fresh rainbow trout pituitary material. The results indicate that the priming pheromone acts through the hypothalamus-pituitary-gonad axis" |
| Keywords: | "Animals Behavior, Animal/*physiology Female Gonadal Steroid Hormones/*blood Hydroxyprogesterones/blood/metabolism Male Olfaction Disorders Ovulation Pheromones Reproduction/*physiology Semen/*physiology Smell/*physiology Spermatozoa/physiology Testosteron;" |
| Notes: | "MedlineOlsen, K H Liley, N R eng Research Support, Non-U.S. Gov't 1993/01/01 Gen Comp Endocrinol. 1993 Jan; 89(1):107-18. doi: 10.1006/gcen.1993.1014" |
