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espanolEl flamenco chileno (Phoenicopterus chilensis) es un ave acuatica endemica de America del Sur. En Chile habita tanto en lagunas altiplanicas como en humedales marinos. Sin embargo, los estudios dietarios en ambientes marinos son escasos. En este trabajo se caracterizo la variacion interanual en la dieta invernal del flamenco en el humedal marino de Bahia Caulin, sur de Chile. Para ello, se determino el tamano de las presas entre junio a septiembre del 2011, 2014 y 2015. Se analizo un total de 157 heces (77 heces en 2011 y 80 heces entre 2014 y 2015). La dieta del flamenco chileno durante el 2011 fue carnivora y estuvo conformada solo por tres presas: el foraminifero Ammonia beccarii, el copepodo Harpacticus sp. y poliquetos. Durante 2014-2015 su dieta fue omnivora, incluyendo la presencia de 15 categorias de presas, entre las que destaco el consumo de algas y fibras vegetales. En lo que respecta a los tamanos de las presas consumidas por el flamenco, el diametro de los foraminiferos oscilo entre los 100 y 900 µm con predominio de organismos entre los 400 y 600 µm. El ancho de Harpacticus sp. consumidos oscilo entre los 160 y 260 µm con predominio para los organismos entre los 200 y 220 µm. El ancho de Parawaldeckia kidderi consumidos oscilo entre los 140 y 800 µm con predominio para los organismos entre los 140 y 400 µm. El ancho de Monocorophium insidiosum consumidos oscilo entre los 80 y 500 µm con predominio para los organismos entre los 80 y 400 µm. El flamenco chileno seria un depredador parcialmente selectivo cuya seleccion de presas estaria dada por las restricciones morfoestructurales del pico de esta ave. EnglishThe Chilean flamingo (Phoenicopterus chilensis) is an endemic aquatic bird of South America. In Chile, it is found in both highland lagoons as well as in marine wetlands. Nevertheless, dietary studies in marine environments are scarce. This work characterized the interannual variation in the winter diet of flamingos found in the marine wetland of Bahia Caulin, southern Chile. To this end, we determined the size of prey items consumed between June and September of the 2011, 2014 and 2015. A total of 157 feces were analyzed (77 feces in 2011 and 80 feces between 2014 and 2015). The diet of Chilean flamingo during 2011 was carnivorous and was formed by only three preys, the foraminifera Ammonia beccarii, the copepod Harpacticus sp. as well as polychaetes. During 2014-2015 its diet was omnivorous, and consisted of 15 categories of prey items, among which the consumption of algae and plant fibers was stressed. Regarding the sizes of prey consumed by flamingo, the diameter of the foraminifera oscillated between 100 and 900 µm with predominance of organisms between 400 and 600 µm. The width of Harpacticus sp. consumed ranged from 160 to 260 µm with a predominance of organisms between 200 and 220 µm. The width of consumed Parawaldeckia kidderi ranged between 140 and 800 µm with predominance for organisms between 140 and 400 µm. The width of Monocorophium insidiosum consumed oscillated between 80 and 500 µm with predominance for organisms between 80 and 400 µm. The Chilean flamingo would be a partially selective predator whose selection of prey would be given by the morphostructural restrictions of the peak of this bird.

revista de biología marina y oceanografía

Variación interanual en la dieta invernal del flamenco chileno Phoenicopterus chilensis (Aves: Phoenicopteriformes) en el humedal marino de Bahía Caulín, Chiloé, sur de Chile