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Trophic ecology of Hyalella sp. (Crustacea: Amphipoda) in a High Andes headwater river with travertine deposits
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We studied the diet of 50 individuals of Hyalella sp. collected in the karstic headwaters of a highaltitude Andean river (3817 m a.s.l. Peru) in four different habitats: macrophytes, bryophytes, leaf litter, and layers of travertine. The gut content analysis showed a dominance of fine particulate organic matter (FPOM) in most habitats - layers of travertine (69.5%), Myriophylum (58.5%) and bryophytes (56.8%) - except for individuals collected in leaf litter where coarse particulate organic matter (CPOM) represented 68% of gut content, which indicates a high trophic flexibility of Hyalella sp. Likewise, in an experiment with feeding chambers in situ during three days, twenty individuals of Hyalella sp. presented a higher consumption of leaf litter of native species (Polylepis sp.) (0.025 mg/day) than those of an introduced species (Eucalyptus globulus) (0.008 mg/day).
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ACOSTA RIVAS, Carlos Raúl and PRAT I FORNELLS, Narcís. Trophic ecology of Hyalella sp. (Crustacea: Amphipoda) in a High Andes headwater river with travertine deposits. International Review of Hydrobiology. 2011. Vol. 96, num. 3, pags. 274-285. ISSN 1434-2944. [consulted: 6 of October of 2026]. Available at: https://hdl.handle.net/2445/165713