Abstract:In any ecosystem, fruits are resources that vary in time and space as well as in nutritional content. Coexistence of species from a trophic guild depends on the division and use of resources. Therefore, the organisms that depend on them as a food source, tend to show a certain degree of specialization. This way, understanding the factors that influence the dynamics of seed dispersal is important for the regeneration and conservation of tropical ecosystems. Our aim was to determine variation in consumption of Piper tuberculatum by fruit bat assemblages in the village of Robles (Jamundí, Valle del Cauca, Colombia). P. tuberculatum is a resource used not only by wildlife but also by people in the village of Robles. Bats were captured in mist nets between June and November 2014, their feces were collected, and the length of the forearm, wing area, leg length and mass were recorded. At the Universidad del Valle seed laboratory, fecal samples were washed, and their content determined. Of the 14 species captured, Sturnira lilium, Carollia brevicauda, Carollia perspicillata and Artibeus lituratus showed signs of having consumed P. tuberculatum. Sturnira lilium was the main consumer of P. tuberculatum fruits, with the greatest number of consumption events of fruit from this plant species, whereas the other bats showed more diversified consumption events. The greatest niche overlap was recorded between C. brevicauda and C. perspicillata, species that showed similar sizes (i.e., wing area and forearm length) followed by S. lilium and C. perspicillata. In contrast, A. lituratus showed the least niche overlap with the other three fruit bats captured. In conclusion, Sturnira lilium showed an interaction Sturnira-Piper, which is the result of low Solanum availability, and this bat species was the largest consumer of P. tuberculatum in the region. Rev. Biol. Trop. 64 (2): 701-713. Epub 2016 June 01.

We evaluate the occurrence of S. bakeri in Colombia, a recently described species. We report seven new records and include data on skull measurements of these individuals and information on the new localities. A discriminant analysis suggests that condyloincisive length and dentary length are the most important measurements to separate S. bakeri and S. luisi from S. lilium. However, to distinguish S. bakeri from S. luisi, we used discrete characters proposed in the original descriptions of these two taxa. Sturnira bakeri should no longer be considered a regionally endemic species from Ecuador and Peru.

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Streblidae es una familia de moscas altamente especializada, la cual se alimenta exclusivamente de murciélagos. Aquí se presenta información sobre las especies de Streblidae presentes en dos fragmentos de bosque seco tropical en Cauca, Colombia. Entre abril y noviembre de 2012 se realizaron 16 jornadas de captura de murciélagos, utilizando redes de niebla, las cuales estuvieron abiertas desde las 18:00 hasta las 06:00. Cada murciélago capturado se revisó y los ectoparásitos encontrados se conservaron en alcohol al 90%. Se recolectaron 85 ectoparásitos y se identificaron 10 especies de estréblidos en siete especies de murciélagos. El análisis mostró que estos parásitos son localmente especializados, lo cual contrasta fuertemente con el alto número de especies hospederas que han sido reportadas para ellos. Se hipotetiza que esta diferencia se debe a restricciones locales que filtran el nicho fundamental de estas moscas. Este trabajo enriquece los inventarios de la entomofauna en remanentes de bosque seco tropical, un ecosistema en estado crítico de conservación.