ESR 32:117-121 (2017)  -  DOI: https://doi.org/10.3354/esr00785

NOTE
Diet composition and prey selection of Telmatobius macrostomus, the Junín giant frog

Andrew S. Watson1,*, Austin L. Fitzgerald1, Oscar J. Damián Baldeón2

1Peace Corps Community-Based Environmental Management Program, Surco, Lima, Peru
2Servicio Nacional de Áreas Naturales Protegidas por el Estado del Perú, Reserva Nacional de Junín, Junín, Peru
*Corresponding author:

ABSTRACT: This study describes the diet composition and prey selection of the Endangered Junín giant frog Telmatobius macrostomus, endemic to the central Andes of Peru. Prey items were recovered by forced regurgitation of stomach contents through gastric lavage. Top prey taxa in all samples (n = 9) consisted of a snail (Mollusca: Gastropoda: Hygrophila: Physidae; 78% frequency of occurrence) and an amphipod (Arthropoda: Malacostraca: Amphipoda: Hyalellidae; 56% frequency of occurrence). T. macrostomus appeared to select snails (family Physidae) and mayflies (family Baetidae) from the available prey in the environment. No vertebrate species were found in the stomach contents. Only 9 adults were found during this study (survey effort = 8.9 person-hours per frog), suggesting that adults of this species are rare and/or difficult to find. Although our sample size is limited, and the results need to be interpreted with caution, these findings provide important basic ecological data that can prove useful in the conservation of this species.


KEY WORDS: Junín giant frog · Telmatobius macrostomus · Diet composition · Prey availability · Prey selection · Wildlife conservation


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Cite this article as: Watson AS, Fitzgerald AL, Damián Baldeón OJ (2017) Diet composition and prey selection of Telmatobius macrostomus, the Junín giant frog. Endang Species Res 32:117-121. https://doi.org/10.3354/esr00785

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