Revista de Biología Tropical ISSN Impreso: 0034-7744 ISSN electrónico: 2215-2075

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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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Tabares, C. J., Montoya, A. F., Arboleda, L., Echeverri, A., Restrepo, L. F., & Olivera-Angel, M. (2006). Efecto de la pluviosidad y el brillo solar sobre la producción y características del semen en el pez Brycon henni(Pisces: Characidae). Revista De Biología Tropical, 54(1), 179–187. https://doi.org/10.15517/rbt.v54i1.13992

Abstract

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).

https://doi.org/10.15517/rbt.v54i1.13992
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