Publications

extended amplification of acoustic signals by amphibian burrows.	animals relying on acoustic signals for communication must cope with the constraints imposed by the environment for sound propagation. a resource to improve signal broadcast is the use of structures that favor the emission or the reception of sounds. we conducted playback experiments to assess the effect of the burrows occupied by the frogs eupsophus emiliopugini and e. calcaratus on the amplitude of outgoing vocalizations. in addition, we evaluated the influence of these cavities on the recepti ...	2016	27209276
numerical and functional response of predators to a long-term decline in mammalian prey at a semi-arid neotropical site.	occurrence and diet of ten carnivorous predators (four falconiforms, four owls, and two foxes), and population levels of their mammalian prey, were monitored over 45 months at a semi-arid site in north-central chile. early in this period, small mammals irrupted and then declined markedly to a density 7% of that at peak. all four falconiforms (buteo polyosoma, falco sparverius, geranoaetus melanoleucus, parabuteo unicinctus) and one owl (tyto alba) responded numerically to the decline in mammalia ...	1992	28313400