Resumen

FERREIRA, Luane S et al. TEMPORAL AND SPATIAL PATTERNS OF THE LONG-RANGE CALLS OF MANED WOLVES (Chrysocyon brachyurus). Mastozool. neotrop. [online]. 2020, vol.27, n.1, pp.81-95.  Epub 19-Jul-2020. ISSN 0327-9383.

Passive acoustic monitoring can aid conservation efforts and elucidate the behavior and ecology of nocturnal/crepuscular secretive species, like the maned wolf. Here we characterize the seasonal, lunar, and nightly patterns in the long-range vocalizations (roar-barks) of free ranging maned wolves at Serra da Canastra National Park (Brazil) throughout eight months of recordings over two years with a grid of 12/13 autonomous recorders. We found an increase in vocal activity coinciding with the mating and the circa-parturition period of the species. Those peaks indicate a role of roar-barks in partner attraction and mate guarding, and in intra-familiar-group communication. Vocal activity happened throughout all recorded periods and was much higher at some sites than at others, suggesting that roar-barks also function to announce territorial ownership and defense. Maned wolves vocalize more around the waxing gibbous lunar phase, and after dusk until mid-night. Moonlight likely reduces foraging time, resulting in more time available to communicate acoustically, while vocalizations early on the onset of activity suggest a territorial announcement function. Group vocalizations did not always follow the general vocal activity pattern, which suggests that social events may require: immediate response, as territorial contests; and/or simultaneous location of animals, as mate guarding, and joint territorial defense. Based on spatial patterns, we estimate between 6 and 11 individuals contributed to the recordings.

Palabras clave : Canidae; moon; passive acoustic; seasonal; vocal.

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