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Asplanchna girodi (de Guerne, 1888) es un rotifero depredador de amplia distribucion en ecosistemas dulceacuicolas templados y tropicales. De esta especie en particular, se conoce poco acerca de su dieta y sus preferencias alimenticias en condiciones naturales, ya que la mayoria de trabajos relacionados con este aspecto se han desarrollado en condiciones de laboratorio. Durante un corto programa de monitoreo en el Embalse La Garcia, un embalse alto andino ecuatorial localizado en la region central del departamento de Antioquia (Colombia), en el que esta especie alcanzo una densidad total de 2296,2 ind.L -1 , se estudio la composicion de la dieta de A. girodi con base solamente en la observacion directa, bajo el microscopio, de los organismos contenidos en los estomagos de todos los individuos presentes en las muestras. Entre junio y septiembre de 2014, se tomaron, mensualmente, en tres estaciones de monitoreo, muestras integradas de cinco profundidades en toda la columna de agua, con una botella muestreadora de 10 L de capacidad. El material recogido fue filtrado a traves de una red de plancton de 30 µm de ojo de malla. Se encontro que A. girodi , presento una preferencia trofica amplia que incluyo el forrajeo de un dinoflagelado ( Ceratium, Schrank), cinco especies de rotiferos y un cladocero.  Estos resultados llevan a concluir que posiblemente A. girodi sea una especie oportunista, toda vez que el consumo esta dirigido a las especies de mayor disponibilidad (en este caso Ceratium ), con el mayor ahorro de energia, puesto que no se invierte en la busqueda de presas especificas y a su vez se constituiria en un importante factor de control de poblaciones de fitoplancton. THE DIET COMPOSITION OF Asplanchna girodi (PLOIMA, ASPANCHNIDAE) IN AN EQUATORIAL HIGH ANDEAN RESERVOIR IN COLOMBIA BASED ON FIELD OBSERVATIONS: Asplanchna girodi (de Guerne, 1888) is a predatory rotifer of wide distribution in temperate and tropical freshwater ecosystems. Of this species, little is known about its diet and its food preferences under natural conditions, since most of the work related to this aspect has been carried out under laboratory conditions. During a short monitoring program at La Garcia Reservoir, a high Andean equatorial reservoir located in the central region of the department of Antioquia (Colombia), in which this species reached a total density of 2.296,2 ind.L -1 , studied the composition of the A. girodi diet based only on the direct observation, under the microscope, of the organisms contained in the stomachs of all the individuals present in the simples. Between June and September 2014, integrated samples composed of five depths were taken monthly at three monitoring stations in the entire water column, with a sampling bottle of 10 L capacity. The collected material was filtered through a 30µm plankton net of mesh eye. It was found that A. girodi , presented a wide trophic preference that included the foraging of a dinoflagellate ( Ceratium , Schrank), five species of rotifers and a cladoceran. These results lead to the conclusion that A. girodi is possibly an opportunistic species, since consumption is directed at the species with the highest availability (in this case Ceratium ) and with the greatest energy savings, since no investment is made in the search for specific prey and in turn would become an important factor in controlling phytoplankton populations.

COMPOSICIÓN DE LA DIETA DE Asplanchna girodi (PLOIMA, ASPLANCHNIDAE) EN UN EMBALSE ALTOANDINO ECUATORIAL EN COLOMBIA BASADO EN OBSERVACIONES DE CAMPO