Abstract (en):
We determined food and reproductive habits of Chaetostoma sp. in the Upper Magdalena basin, Colombia. The samplings were monthly between August 2001 and July 2012. We collected 1853 individuals in 11 size classes, between 34 â 114 mm SL, with an average length of 43.5 mm SL. The frequent recruitment was observed throughout the year, however the greater contribution of young individuals occurred between January and March 2012. Overall, Chaetostoma sp. was categorized as an hervibore with preference for diatoms. Navicula was the main food item, while Synedra, Gomphonema, Cymbella, Oscillatoria and Fragilaria were secondary food items. The sex ratio was 1:1. The average fecundity was 124 oocytes and average diameter of 1.54 mm, possibly related to a reproductive strategy K.
Abstract (es):
Se determinaron los hábitos alimenticios y reproductivos de Chaetostoma sp. en el alto rÃo Magdalena, Colombia. Los muestreos fueron mensuales entre agosto de 2011 y julio de 2012. Se colectaron 1853 individuos, distribuidos en 11 clases de tallas entre 34 â 114 mm LE, con una longitud media de 43,5 mm LE. Se observó un reclutamiento frecuente durante todo el año del muestreo, sin embargo el mayor aporte de individuos juveniles se presentó entre enero y marzo 2012. Chaetostoma sp. se categorizó como un herbÃvoro con preferencia por las diatomeas, donde Navicula fue el Ãtem principal, mientras que Synedra, Gomphonema, Cymbella, Oscillatoria y Fragilaria fueron Ãtems secundarios. La proporción sexual fue de 1:1, su fecundidad promedio fue de 124 oocitos y el diámetro de 1,54 mm, relacionado con estrategia reproductiva k. Proyecto financiado por Emgesa S. A. E.S.P.
Keywords:
Historia de vida, Trofodinámica, Estrategia reproductiva (es)
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How to Cite
Zúñiga-Upegui, P. T., Villa-Navarro, F. A., García-Melo, L. J., García-Melo, J. E., Reinoso-Flórez, G., Gualtero-Leal, D. M., & Ángel-Rojas, V. J. (2014). Aspectos ecológicos de <em>Chaetostoma<em> sp. (Siluriformes: Loricariidae) en el alto río Magdalena, Colombia. Biota Colombiana, 15(2). Retrieved from https://revistas.humboldt.org.co/index.php/biota/article/view/322
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