Patrones de actividad de la chachalaca pálida (Ortalis poliocephala)

Lavariega, Mario C.; Monroy-Gamboa, Alina Gabriela; Padilla-Gómez, Eugenio; Olivera-Martínez, Ubaldo

doi:10.28947/hrmo.2019.20.2.455

Cited by 2 publications

(2 citation statements)

References 25 publications

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“…Our results are in disagreement with previous studies employing video cameras for monitoring daily activity in other cracids, including Chachalacas, which found bimodal patterns in diurnal activity with peaks at sunrise and sunset and no nocturnal sightings (Srbek–Araujo et al, 2012; Lafleur et al, 2014; Lavariega et al, 2019; Senič, 2020). Further research should evaluate whether the nocturnal vocalizations and the unimodal pattern of vocal activity of the Chaco Chachalaca is a rare behavior among cracids or whether it is related to the employment of autonomous sound recorders for monitoring daily activity.…”

Section: Discussioncontrasting

confidence: 99%

“…The study of the activity patterns of cracids is important to understand their biology and contribute to their conservation and management strategies (Baldo & Mennill, 2011; Nunes, 2015; Lavariega et al, 2019). In this study, we identified the hours and months with higher vocal activity of Chaco Chachalaca that will be useful to save efforts of future monitoring programs aiming to study the species.…”

Section: Discussionmentioning

confidence: 99%

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Passive Acoustic Monitoring of Chaco Chachalaca (Ortalis canicollis) Over a Year: Vocal Activity Pattern and Monitoring Recommendations

Pérez‐Granados

Schuchmann

2021

Tropical Conservation Science

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Chaco Chachalaca ( Ortalis canicollis) is a declining Neotropical bird, for which our current knowledge about its natural history is very limited. Here, we evaluated for first time the utility of passive acoustic monitoring, coupled with automated signal recognition software, to monitor the Chaco Chachalaca, described the vocal behavior of the species across the diel and seasonal cycle patterns, and proposed an acoustic monitoring protocol to minimize error in the estimation of the vocal activity rate. We recorded over a complete annual cycle at three sites in the Brazilian Pantanal. The species was detected on 99% of the monitoring days, proving that this technique is a reliable method for detecting the presence of the species. Chaco Chachalaca was vocally active throughout the day and night, but its diel activity pattern peaked between 0500 and 0900. The breeding season of Chaco Chachalaca in the Brazilian Pantanal, based on seasonal changes in vocal activity, seems to occur during the last months of the dry season, with a peak in vocal activity between August and October. Our results could guide future surveys aiming to detect the presence of the species, both using traditional or acoustic surveys, or to evaluate changes in population abundance using passive acoustic monitoring, for which recorders should be left in the field for a minimum period of nine days to obtain a low-error estimate of the vocal activity of the species. Our results suggest that passive acoustic monitoring might be useful, as a complementary tool to field studies, for monitoring other cracids, a family with several threatened species that are reluctant to human presence.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Passive Acoustic Monitoring of Chaco Chachalaca (Ortalis canicollis) Over a Year: Vocal Activity Pattern and Monitoring Recommendations

Pérez‐Granados

Schuchmann

2021

Tropical Conservation Science

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Density and activity patterns of bobcat in its southernmost distribution

Lavariega

Briones‐Salas

Monroy-Gamboa³

et al. 2022

Anim. Biodiv. Conserv.

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Estimating density and activity patterns is useful for management and conservation of species. Data for Mexican bobcat (Lynx rufus) populations are scarce. Here we estimated the density of a bobcat population in Oaxaca, southern Mexico, and evaluated its daily activity patterns. We also evaluated macroecological patterns of bobcat density across its distribution range to determine any geographical (latitudinal, longitudinal, elevation, or range centroid) or climatic effects on the population density. Camera–trap data were divided into four 60–day periods (two in the dry season and two in the rainy season). Density was calculated using the random encounter model and daily activity patterns were analyzed fitting a kernel density function. The mean estimated density for the four periods was 17.3 bobcats/100 km2, with the highest densities occurring during the dry periods. Bobcat daily activity pattern presented two peaks, one after midnight and the other after dawn, with very slight changes between seasons. In the study area, density and activity patterns were associated with anthropogenic perturbation and prey availability. Bobcats increased their population density in the dry season, and showed a preference for activity at night and early morning hours when it is cooler and there are likely fewer competitors but more prey. Across its range, bobcat density was mainly related to annual precipitation and mean temperature of the driest quarter at 100 km radius buffers, and between annual precipitation and longitude on a smaller scale (50 km radius buffers). These findings support their preference for the arid or mesic environments that enabled them to reach southern areas of the Neartic region.

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Patrones de actividad de la chachalaca pálida (Ortalis poliocephala)

Cited by 2 publications

References 25 publications

Passive Acoustic Monitoring of Chaco Chachalaca (Ortalis canicollis) Over a Year: Vocal Activity Pattern and Monitoring Recommendations

Passive Acoustic Monitoring of Chaco Chachalaca (Ortalis canicollis) Over a Year: Vocal Activity Pattern and Monitoring Recommendations

Density and activity patterns of bobcat in its southernmost distribution

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