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- W232502174 abstract "We compared the daily feeding activity and size of prey consumed by Plecoptera nymphs of Anacroneuria chorrera, A. cacute, A. paleta and A. tachira, species living in sympatry in the stream La Picon in Merida, Venezuela. Samples were taken from the stream bottom every four hours in three 24-hour cycles. From each sample were selected Plecoptera mature nymphs. The head width of each nymph was measured and their stomach contents analyzed to determine the condition of fullness of the stomach and estimate the average size of prey consumed. Stomach fullness results show that the four species were fed continuously for 24 hours daily, although two of them, A. tachira and A. paleta, exhibited some degree of periodicity in the daily rhythm of feeding. The size of prey ingested was associated with the size of nymphs of the four species. The larger nymphs (A. chorrera) consumed the largest prey and smaller nymphs (A. paleta) fed on smaller prey. The species A. tachira and A. cacute, with intermediate sizes between the two preceding species fed on prey with intermediate sizes also. We concluded that daily feeding activity and size of consumed prey contribute to food niche separation of four Plecoptera species in the stream La Picon. Palabras clave: Anacroneuria, Andes, Plecoptera, relaciones troficas, rios, Venezuela" @default.
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- W232502174 date "2009-01-01" @default.
- W232502174 modified "2023-09-24" @default.
- W232502174 title "RITMO DIARIO DE ALIMENTACIÓN Y TAMAÑO DE PRESA EN CUATRO ESPECIES SIMPÁTRICAS DE PLECOPTERA (INSECTA) EN UN RÍO TROPICAL ANDINO DAILY RHYTHM OF FEEDING AND PREY SIZE IN FOUR SYMPATRIC SPECIES OF PLECOPTERA (INSECTA) IN A TROPICAL ANDEAN STREAM" @default.
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