The influence of environmental variables on capybara (Hydrochoerus hydrochaeris: Rodentia, Hydrochoeridae) detectability in anthropogenic environments of southeastern Brazil

Autor(es)

Micchi de Barros Ferraz, Katia Maria Paschoaletto ^[1] ; Manly, Bryan ^[2] ; Verdade, Luciano Martins ^[3]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Luiz de Queiroz Coll Agr ESALQ, Dept Forest Sci, Quantitat Methods Lab, Piracicaba - Brazil

^[2] Western EcoSyst Technol Inc, Cheyenne, WY - USA

^[3] Univ Sao Paulo, Luiz de Queiroz Coll Agr ESALQ, Dept Biol Sci, Anim Ecol Lab, Piracicaba - Brazil

• Tipo de documento: Artigo Científico
• Fonte: POPULATION ECOLOGY; v. 52, n. 2, p. 263-270, APR 2010.
• Citações Web of Science: 4

Resumo

Capybaras were monitored weekly from 1998 to 2006 by counting individuals in three anthropogenic environments (mixed agricultural fields, forest and open areas) of southeastern Brazil in order to examine the possible influence of environmental variables (temperature, humidity, wind speed, precipitation and global radiation) on the detectability of this species. There was consistent seasonality in the number of capybaras in the study area, with a specific seasonal pattern in each area. Log-linear models were fitted to the sample counts of adult capybaras separately for each sampled area, with an allowance for monthly effects, time trends and the effects of environmental variables. Log-linear models containing effects for the months of the year and a quartic time trend were highly significant. The effects of environmental variables on sample counts were different in each type of environment. As environmental variables affect capybara detectability, they should be considered in future species survey/monitoring programs. (AU)

• Processo FAPESP: 00/00180-9 - Estrutura populacional da capivara (Hydrochoerus hydrochaeris, Rodentia: Caviomorpha) em função da qualidade de habitat na bacia do Rio Piracicaba, SP
• Beneficiário: Luciano Martins Verdade
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 00/00602-0 - Estrutura populacional da capivara (Hydrochoerus hydrochaeris, Rodentia: Caviomorpha) em função da qualidade do habitat na bacia do rio Piracicaba/SP
• Beneficiário: Katia Maria Paschoaletto Micchi de Barros Ferraz
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 00/00582-0 - Distribuição e abundância de capivaras (Hydrochoerus hydrochaeris) no campus Luiz de Queiroz da Universidade de São Paulo, em Piracicaba, SP
• Beneficiário: Roberto Mario Ferreira dos Santos Filho
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica