Exposure to 17α,20β-dihydroxy-4-pregnen-3-one changes seminal characteristics in Nile tilapia, Oreochromis niloticus |
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| Authors: | Marcus Frederico Martins Pinheiro Silvia Maria Guimarães de Souza & Leonardo José Gil Barcellos |
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| Institution: | Department of Animal Production, Faculty of Agronomy, Federal University of Rio Grande do Sul. Avenida Bento Gonçalves, Porto Alegre, RS, Brazil;Universidade de Passo Fundo, Faculty of Agronomy and Veterinary Medicine, Passo Fundo, RS, Brazil |
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| Abstract: | This experiment was conducted to evaluate the seminal characteristics of Nile tilapia males exposed to water‐borne 17α,20β‐dihydroxy‐4‐pregnen‐3‐one (17,20βP). Male Nile tilapia (Oreochromis niloticus L.) were exposed to the steroidal pre‐ovulatory pheromone 17,20βP, added to water at a concentration of 5×10?9 M. The pheromone‐exposed males had higher sperm volume and concentration. In addition, the spermatozoa contained in the sperm had higher motility and the motility duration was longer than ethanol‐exposed males (control group). The percentage of live spermatozoa was not affected by the treatments. Our results suggest that this pheromone can improve sperm quality characteristics and could become a non‐invasive method for enhancing spawning in Nile tilapia. |
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| Keywords: | Nile tilapia Oreochromis niloticus reproduction milt pheromone 17 20βP |
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