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Título: | Single or repeated immunization against GnRH fails to completely abolish spermatogenesis in dwarf bucks (Capra hircus) |
Autor: | Giriboni, Julia; Martínez-Nevado, Eva; García, Juncal; Velázquez, Rosario; Toledano-Díaz, A. CSIC ORCID ; Ungerfeld, Rodolfo; Santiago Moreno, Julián | Palabras clave: | GnRH vaccine Male contraception Reproductive control |
Fecha de publicación: | 14-oct-2022 | Editor: | John Wiley & Sons | Citación: | Zoo Biology (2022) | Resumen: | In both captive wildlife and production animals is important to develop strategies for population control. Immunization against GnRH is an easy and inexpensive immunocastration method that reduces the concentration of testosterone and decreases sperm quality. However, its effectiveness depends on the species and repetition of the treatment. This study aimed to compare the effectiveness of a single treatment (initial immunization plus a booster with Improvac) vs repeated treatment (six doses of Improvac) to inhibit testicular function and maintain the contraceptive status during long periods in bucks. Three Dwarf bucks (Capra hircus) received two doses of Improvac, the first on Week 0, and the booster 4 weeks later (single immunization, group SI) while three Dwarf bucks received one dose of Improvac every 6 months during 3 consecutive years (repeated immunization, group RI). The other three Dwarf bucks remained untreated (control bucks, group CON). Bucks from RI had a greater decrease in scrotal circumference, testosterone concentration, male odor intensity, and sperm quality than SI bucks. However, there were no differences between SI and CON bucks in any of the variables studied. Overall, repeated treatment of Improvac decreased the testicular function of Dwarf bucks, although did not produce complete infertility. However, the repetition of the treatment produced more intensive negative effects, indicating that the strength of the effects of Improvac is rapidly lost in bucks. | Descripción: | 7 Pág. Departamento de Reproducción Animal | Versión del editor: | https://doi.org/10.1002/zoo.21743 | URI: | http://hdl.handle.net/10261/295361 | DOI: | 10.1002/zoo.21743 | ISSN: | 1098-2361 | E-ISSN: | 0733-3188 |
Aparece en las colecciones: | (INIA) Artículos |
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