Evaluation of parameters associated with seminal quality in llamas (Lama glama) during the pre- and post-mating periods
South American camelids (SAC) have gained global relevance due to their productive characteristics, such as meat properties and fiber quality. However, many aspects of their reproductive physiology remain unknown. The llama (Lama glama), a domesticated SAC species raised in the northwestern region o...
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| Formato: | Artículo revista |
| Lenguaje: | Español |
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Universidad Nacional del Nordeste
2025
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| Acceso en línea: | https://revistas.unne.edu.ar/index.php/vet/article/view/8158 |
| Aporte de: |
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I48-R154-article-8158 |
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ojs |
| institution |
Universidad Nacional del Nordeste |
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I-48 |
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R-154 |
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Revistas UNNE - Universidad Nacional del Noroeste (UNNE) |
| language |
Español |
| format |
Artículo revista |
| topic |
llama seminal analysis semen quality artificial vagina llama análisis seminal calidad seminal vagina artificial |
| spellingShingle |
llama seminal analysis semen quality artificial vagina llama análisis seminal calidad seminal vagina artificial Guijarro-Castro, R. A. Martínez-Espeche, M. V. Casaretto, C. Tonda, S. E. Arzeno, M. T. Barrera, A. D. Ábalos, M. C. Acuña, F. A. Evaluation of parameters associated with seminal quality in llamas (Lama glama) during the pre- and post-mating periods |
| topic_facet |
llama seminal analysis semen quality artificial vagina llama análisis seminal calidad seminal vagina artificial |
| author |
Guijarro-Castro, R. A. Martínez-Espeche, M. V. Casaretto, C. Tonda, S. E. Arzeno, M. T. Barrera, A. D. Ábalos, M. C. Acuña, F. A. |
| author_facet |
Guijarro-Castro, R. A. Martínez-Espeche, M. V. Casaretto, C. Tonda, S. E. Arzeno, M. T. Barrera, A. D. Ábalos, M. C. Acuña, F. A. |
| author_sort |
Guijarro-Castro, R. A. |
| title |
Evaluation of parameters associated with seminal quality in llamas (Lama glama) during the pre- and post-mating periods |
| title_short |
Evaluation of parameters associated with seminal quality in llamas (Lama glama) during the pre- and post-mating periods |
| title_full |
Evaluation of parameters associated with seminal quality in llamas (Lama glama) during the pre- and post-mating periods |
| title_fullStr |
Evaluation of parameters associated with seminal quality in llamas (Lama glama) during the pre- and post-mating periods |
| title_full_unstemmed |
Evaluation of parameters associated with seminal quality in llamas (Lama glama) during the pre- and post-mating periods |
| title_sort |
evaluation of parameters associated with seminal quality in llamas (lama glama) during the pre- and post-mating periods |
| description |
South American camelids (SAC) have gained global relevance due to their productive characteristics, such as meat properties and fiber quality. However, many aspects of their reproductive physiology remain unknown. The llama (Lama glama), a domesticated SAC species raised in the northwestern region of Argentina, exhibits unique seminal characteristics, including ability to form thread of variable length and variability in semen parameters, which may be influenced by environmental, nutritional, and health conditions. The aim of this study was to evaluate parameters associated with semen quality in llamas within their natural habitat during two periods: before and after the mating season. A total of 32 males were evaluated during the pre-mating period (October), with a 56.25% success rate in accepting the artificial vagina (AV). In the post-mating period (April-May), 41 males were evaluated, achieving a 90.25% AV acceptance rate during semen collection (p<0.001). Additionally, the duration of copulation was significantly longer in the pre-mating period (6.33 ± 1.51 min) compared to the post-mating period (4.43 ± 2.27 min; p=0.002). The volume of the liquid fraction of the ejaculate plus foam was also higher in the pre-mating period (8.10 ± 1.9 mL) than in the post-mating period (4.17 ± 0.38 mL; p<0.001). Regarding sperm motility, a trend toward higher motility was observed in the post-mating period. Membrane functionality was significantly higher in the post-mating period (32.28 ± 3.44%) compared to the pre-mating period (22.23 ± 1.71%; p<0.05). Sperm morphology analysis revealed a higher percentage of normal spermatozoa in the pre-mating period (71.66 ± 10.1%) compared to the post-mating period (48.60 ± 2.65%; p<0.001), with abnormalities such as loose heads and tail defects being more prevalent in the post-mating period. These findings provide valuable insights for optimizing reproductive management protocols and improving the productivity of this species. |
| publisher |
Universidad Nacional del Nordeste |
| publishDate |
2025 |
| url |
https://revistas.unne.edu.ar/index.php/vet/article/view/8158 |
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I48-R154-article-81582025-04-01T14:28:39Z Evaluation of parameters associated with seminal quality in llamas (Lama glama) during the pre- and post-mating periods Evaluación de parámetros asociados a la calidad seminal en llamas (Lama glama) durante los períodos pre- y post-servicio Guijarro-Castro, R. A. Martínez-Espeche, M. V. Casaretto, C. Tonda, S. E. Arzeno, M. T. Barrera, A. D. Ábalos, M. C. Acuña, F. A. llama seminal analysis semen quality artificial vagina llama análisis seminal calidad seminal vagina artificial South American camelids (SAC) have gained global relevance due to their productive characteristics, such as meat properties and fiber quality. However, many aspects of their reproductive physiology remain unknown. The llama (Lama glama), a domesticated SAC species raised in the northwestern region of Argentina, exhibits unique seminal characteristics, including ability to form thread of variable length and variability in semen parameters, which may be influenced by environmental, nutritional, and health conditions. The aim of this study was to evaluate parameters associated with semen quality in llamas within their natural habitat during two periods: before and after the mating season. A total of 32 males were evaluated during the pre-mating period (October), with a 56.25% success rate in accepting the artificial vagina (AV). In the post-mating period (April-May), 41 males were evaluated, achieving a 90.25% AV acceptance rate during semen collection (p<0.001). Additionally, the duration of copulation was significantly longer in the pre-mating period (6.33 ± 1.51 min) compared to the post-mating period (4.43 ± 2.27 min; p=0.002). The volume of the liquid fraction of the ejaculate plus foam was also higher in the pre-mating period (8.10 ± 1.9 mL) than in the post-mating period (4.17 ± 0.38 mL; p<0.001). Regarding sperm motility, a trend toward higher motility was observed in the post-mating period. Membrane functionality was significantly higher in the post-mating period (32.28 ± 3.44%) compared to the pre-mating period (22.23 ± 1.71%; p<0.05). Sperm morphology analysis revealed a higher percentage of normal spermatozoa in the pre-mating period (71.66 ± 10.1%) compared to the post-mating period (48.60 ± 2.65%; p<0.001), with abnormalities such as loose heads and tail defects being more prevalent in the post-mating period. These findings provide valuable insights for optimizing reproductive management protocols and improving the productivity of this species. Los camélidos sudamericanos (CSA) han adquirido relevancia global debido a sus características productivas, como las propiedades de su carne y la calidad de su fibra. Sin embargo, aún se desconocen numerosos aspectos de su fisiología reproductiva. La llama (Lama glama), una especie de CSA doméstico criada en la región noroeste de Argentina, presenta características seminales únicas, como alta filancia y una notable variabilidad en sus parámetros seminales, los cuales pueden ser influenciados por las condiciones ambientales, nutricionales y sanitarias. El objetivo del presente estudio fue evaluar parámetros asociados a la calidad seminal en llamas dentro de su hábitat natural durante dos períodos: antes y después de la temporada de servicio. Se utilizaron 32 machos en el período pre-servicio (octubre) con un 56,25% de éxito en la aceptación de la vagina artificial (VA), mientras que en el período post-servicio (abril-mayo), se utilizaron 41 machos, obteniéndose un 90,25% de aceptación a la VA durante las colectas (p<0,001). Además, la duración del servicio fue significativamente mayor en el período pre-servicio (6,33 ± 1,51 min) en comparación con el post-servicio (4,43 ± 2,27 min; p=0,002). El volumen de la fracción líquida del eyaculado + espuma también fue mayor en el período pre-servicio (8,10 ± 1,90 mL) respecto al post-servicio (4,17 ± 0,38 mL; p<0,001). En cuanto a la movilidad espermática, se observó una tendencia a una mayor movilidad en el período post-servicio. La funcionalidad de membrana fue superior en el período post-servicio (32,28 ± 3,44%) frente al pre-servicio (22,23 ± 1,71%; p<0,05). La morfología espermática mostró un mayor porcentaje de espermatozoides normales en el período pre-servicio (71,66 ± 10,10%) que en el post-servicio (48,60 ± 2,65%; p<0,001), con anormalidades como cabezas sueltas y alteraciones de cola durante el período post-servicio. Estos resultados proporcionan información relevante para optimizar protocolos de manejo reproductivo y mejorar la productividad de esta especie. Universidad Nacional del Nordeste 2025-04-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unne.edu.ar/index.php/vet/article/view/8158 10.30972/vet.3618158 Revista Veterinaria; Vol. 36 Núm. 1 (2025); 1-8 1669-6840 1668-4834 spa https://revistas.unne.edu.ar/index.php/vet/article/view/8158/7760 https://creativecommons.org/licenses/by-nc/4.0 |