Data/hora: 09/06/2024 17:42:05

Biblioteca(s): | Embrapa Pantanal.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 1
Data corrente: | 31/07/2015
Data da última atualização: | 04/12/2015
Autoria: | CID, B.; SANTOS, L. G. R. O.; MOURAO, G.
Afiliação: | BRUNO CID, UFRJ; LUIZ GUSTAVO RODRIGUES OLIVEIRA SANTOS, UFMS; GUILHERME DE MIRANDA MOURAO, CPAP.
Título: | The relationship between external temperature and daily activity in a large rodent (Dasyprocta azarae) in the Brazilian Pantanal.
Ano de publicação: | 2015
Fonte/Imprenta: | Journal of Tropical Ecology, v. 31, n. 5, p. 469-472, 2015.
ISSN: | 0266-4674
Idioma: | Inglês
Conteúdo: | Daily activity patterns reflect interactions between circadian mechanisms and environmental stimuli. Among these stimuli, temperature can be an important factor affecting activity budgets. To sample the agouti (Dasyprocta azarae), a systematic camera-trap grid was established with 50 independent sampling sites. A circular kernel function was used to characterize the activity patterns of the agouti population. To evaluate shifts in activity as a function of mean daily temperature, the entire set of records was subdivided into smaller sets covering different temperature ranges. The activity pattern belonging to each set was characterized and compared through the overlap of their full activity (95% isopleth) and activity core (50% isopleth). Based on 400 independent records, agoutis were predominately diurnal. They shifted their activity core, while keeping their activity range (the amount of time a population remains active during the 24-h cycle) constant through the temperature gradient. The agouti demonstrated a unimodal activity pattern at lower temperatures,which became more bimodal at higher temperatures. Nevertheless, it kept its activity range constant, regardless of temperature. These results likely reflect a trade-off between activity time and thermoregulation during the diurnal period and demonstrate how the agouti can change its behaviour to achieve thermal comfort.
Palavras-Chave: | Activity; Camera-trap; Circular kernel.
Thesaurus Nal: | Agouti; rodents; temperature.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/134898/1/S0266467415000309a7.pdf
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (59329-1) - UPC - AP - PP - SP18069 -  - 18069 - DIS