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versión On-line ISSN 2007-3364


SANTOS-MORENO, Antonio  y  KRAKER-CASTANEDA, Cristian. Comparison of ultrasonic detection systems for relative activity of insectivorous bats. Therya [online]. 2013, vol.4, n.1, pp.61-68. ISSN 2007-3364.

We compared three acoustic systems for monitoring ultrasound (UltraMic200K, Rome, Italy; Echo Meter EM3, Concord, USA; and AnabatTM SD2, Brisbane, Australia) in order to infer relative activity of insectivorous bats under similar conditions, which presumably could implicate bias, but is evidence of the difficulty of comparing data sets generated in the same area with different detectors. The detectors were placed together for five days in an oak forest ecotone in Santa Maria Tiltepec, municipality of San Pedro Topiltepec, Sierra Mixteca of Oaxaca, Mexico. For each device we obtained 15 hours of recordings. The Ultramic200k is the cheapest system, although the space required for storing the files is very superior to the other devices, and requires connection to an external energy source. The Echo Meter EM3 is a medium priced dispositive, with less memory demands, but recorded significantly fewer ultrasound files and required a full load of batteries per recording session. The AnabatTM SD2 has been more widely used, requires significantly less storage space than the other two devices, and operates with less energy; however, it is the most expensive of the detectors tested.

Palabras llave : AnabatTM SD2; Echo Meter EM3; relative activity; UltraMic200k.

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