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3 results on '"Períodos de actividad"'

1. Hourly activity patterns of the insectivorous bat assemblage in the urban–rural landscape of Lima, Peru.

Author

Rivero-Monteagudo, Jorge and Mena, José Luis

Subjects
*BATS, *CITIES & towns, *CIRCADIAN rhythms, *LANDSCAPES, *LANDSCAPE changes, *RURAL women
Abstract

Circadian rhythms of bats are simultaneously influenced by both abiotic and biotic factors that vary across different landscapes. Since cities modify environmental conditions in which bats forage and roost, their temporal activity can be altered. Based on acoustic surveys, we described hourly activity patterns of eight aerial insectivorous bat species in an urban–rural landscape of Lima, Peru. We also explored whether bats show temporal partitioning at the assemblage level and, for three common species, if activity patterns change between landscape units (urban and rural areas) or moonlight intensity (dark and bright nights). At the assemblage level, bats displayed high temporal overlap, especially in rural areas. At the species level, Mormopterus kalinowskii and Tadarida brasiliensis displayed bimodal patterns at both landscape units, and Promops davisoni showed an almost uniform pattern or bimodal pattern at urban and rural sites, respectively. In rural areas, other bat species exhibited either unimodal patterns (Nyctinomops laticaudatus , N. aurispinosus , N. macrotis , and Tomopeas ravus) or a bimodal pattern (Myotis). Moonlight intensity had little influence on activity periods of most bat species. Our study provides valuable information for sampling designs and future studies on activity patterns focused on coexistence among insectivorous bat species in arid landscapes. [ABSTRACT FROM AUTHOR]

Published
2023
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2. Activity patterns of medium and large mammals in two savanna ecosystems in the Colombian Llanos.

Author

Castillo-Figueroa, Dennis, Martínez-Medina, Daniela, and Rodríguez-Posada, Miguel E.

Subjects
SAVANNAS, MAMMAL conservation, WILDLIFE conservation, MAMMALS, ECOSYSTEMS, URBAN agriculture, COMPETITION (Biology)
Abstract

Copyright of Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales is the property of Academia Colombiana de Ciencias Exactas, Fisicas y Naturales and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2021

3. Patrones de actividad de mamíferos medianos y grandes en dos ecosistemas de sabana de los Llanos colombianos

Author

Dennis Castillo-Figueroa, Miguel E. Rodríguez-Posada, and Daniela Martínez-Medina

Subjects
Mamíferos neotropicales, Cuenca del Orinoco, Ecology, Orinoco basin, Estrategias conductuales, General Mathematics, Camera traps, General Physics and Astronomy, General Chemistry, Niche overlap, Savanna regions, General Biochemistry, Genetics and Molecular Biology, General Energy, History and Philosophy of Science, Regiones de sabana, Neotropical mammals, General Earth and Planetary Sciences, Periodos de actividad, Ecosystem, Cámaras trampa, Solapamiento de nicho, General Agricultural and Biological Sciences, Activity periods, Behavioural strategies
Abstract

Neotropical savannas have undergone continuous processes of landscape transformation (e.g., agriculture, oil, gas, and hydrocarbon industry) and very little is known about the ecology and natural history of key biological groups such as terrestrial mammals while the information on behavioral aspects of mammalian species in these ecosystems is very scarce. Here, we aimed to describe the activity patterns of medium and large mammals in two savanna ecosystems in the Colombian Llanos. A set of 60 camera traps was installed in the two ecosystems for 35 days (2100 camera days). We described the activity patterns of nine predominantly nocturnal species. We found no difference in circadian distributions of mammals between ecosystems. Cuniculus paca Linnaeus 1758 and Dasyprocta fuliginosa Wagler 1832 showed patterns of exclusion probably due to competition whereas other species like Tamandua tetradactyla Linnaeus1758 and Myrmecophaga tridactyla Linnaeus 1758 displayed similar activity patterns. We highlight the importance of savannas for the conservation of these species and discuss the relevance of studies on activity patterns for mammal ecology and conservation in Neotropical savannas. Resumen A pesar de que las sabanas neotropicales han sido sometidas a procesos continuos de transformación del paisaje (por ejemplo, la agricultura, la industria de petróleo, gas e hidrocarburos), muy poco se sabe sobre la ecología e historia natural de grupos biológicos importantes como los mamíferos terrestres, y la información asociada con los aspectos comportamentales de las especies de mamíferos que habitan estos ecosistemas es especialmente escasa. El objetivo del estudio fue describir los patrones de actividad de mamíferos medianos y grandes en dos ecosistemas de sabana de los Llanos colombianos. Se instalaron 60 cámaras trampa en los dos ecosistemas durante 35 días (2100 días-cámara). Se describieron los patrones de actividad de nueve especies predominantemente nocturnas. No se encontraron diferencias en las distribuciones circadianas de mamíferos entre ecosistemas. Cuniculus paca Linnaeus 1758 y Dasyprocta fuliginosa Wagler 1832 mostraron patrones de exclusión explicados probablemente por la competencia, en tanto que otras especies como Tamandua tetradactyla Linnaeus 1758 y Myrmecophaga tridactyla Linnaeus 1758 mostraron patrones de actividad similares. Se destaca la importancia de las sabanas para la conservación de estas especies y se discute la relevancia de los estudios sobre patrones de actividad para la ecología y conservación de mamíferos en las sabanas neotropicales.

Published
2022

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