Efecto de la pluviosidad y el brillo solar sobre la producción y características del semen en el pez Brycon henni(Pisces: Characidae)
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| Autores: | , , , , , |
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| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2006 |
| Descripción: | In Colombia the fish Brycon henni is a protected endemic species. It inhab-its water bodies in coffee producing areas (700-1900 ma.s.l.; 4º35’56’’ N - 74º04’51’’ W; 18-28°C). Insufficient knowledge of its basic biology and behavior prevent the commercial culture of this promising fish. We studied the production and sperm physiology of captive males. Along a year 20 samples were taken from each of 10 males. The sample was obtained by abdominal cefalo-caudal massage and transported to the laboratory at 4°C. Except for September and October (maximum rainfall), sperm was always obtained in at least 50% of the males. Color, osmolality and pH were similar in all the samples. Volume, concentration, viability, motility and activa-tion time were variable: sunshine had a positive effect on volume (Spearman p<0.05) and on sperm concentra-tion (Spearman p<0.05) while pluviosity had a negative effect on volume and viability. The proportion of ions (Na, K, Mg, Ca) was constant along the year; Na being 10-fold higher than K and 100-fold higher than Mg and Ca; however the absolute concentration of all ions was slightly higher in April and in July (with no apparent relation with the other variables analyzed). |
| País: | Portal de Revistas UCR |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Lenguaje: | Español |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/13992 |
| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/13992 |
| Palabra clave: | Espermiología concentración iónica condiciones ambientales |