Combined effect of ambient temperature and solar radiation on maned sloths' behaviour and detectability

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dc.contributor.authorLopes, Gabriel S.
dc.contributor.authorCassano, Camila Righetto
dc.contributor.authorMureb, Laila Santim
dc.contributor.authorMiranda, Flavia Regina
dc.contributor.authorCruz-Neto, Ariovaldo P. [UNESP]
dc.contributor.authorGiné, Gastón Andrés Fernandez
dc.contributor.institutionUniversidade Estadual de Santa Cruz
dc.contributor.institutionInstituto de Pesquisa e Conservação de Tamanduás no Brasil
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2023-07-29T13:19:09Z
dc.date.available2023-07-29T13:19:09Z
dc.date.issued2023-01-01
dc.description.abstractChanges in ambient temperature and solar radiation may affect sloths' metabolic rate and body temperature, with consequent changes in activities, postures and microhabitat selection. Although the separate effect of temperature and solar radiation on sloth's behaviour have been previously studied, the combined effect of these climatic factors on behavioural aspects of sloths has never been systematically evaluated in field conditions. Here we evaluated the influence of hourly ambient temperature variation on maned sloth (Bradypus torquatus) activities, postures and tree crown positions, under sunny and cloudy conditions; and tested if any of the animal posture and position increase their exposure to human detection. We performed 350 h of visual observation on eight maned sloths, equipped with radio-backpacks, in northern Bahia, Brazil, recording their activities, and their resting postures and positions on tree crowns. We also recorded the time taken to visualize the sloths on 58 days to analyse if sloths' detection is affected by posture and position. Higher ambient temperature, within a range of 21–33°C, increased the sloths' activity levels in cloudy conditions but reduced their activity in sunny conditions. Increasing ambient temperature also reduced the frequency of huddled posture and increased the frequency of extended posture and permanence in the inner tree crown. Lastly, the postures and positions did not influence sloths' detectability. Thus, the direction of the temperature–activity relationship depends on climatic conditions (sunny/cloudy), and individuals rely on resting postures and positions to thermoregulate. The warmer and drier future climate, expected to occur in the northern Atlantic Forest, may impose change in the diurnal activity levels and postural pattern for this threatened species, leading maned sloths to reduce its activity on sunny and warmer days and adopting an extended posture.en
dc.description.affiliationPrograma de Pós-graduação em Ecologia e Conservação da Biodiversidade Universidade Estadual de Santa Cruz
dc.description.affiliationLaboratório de Ecologia Aplicada a Conservação Universidade Estadual de Santa Cruz
dc.description.affiliationPrograma de Pós-graduação em Ciência Animal Universidade Estadual de Santa Cruz
dc.description.affiliationInstituto de Pesquisa e Conservação de Tamanduás no Brasil
dc.description.affiliationInstituto de Biociências de Rio Claro Universidade Estadual Paulista Júlio de Mesquita Filho
dc.description.affiliationUnespInstituto de Biociências de Rio Claro Universidade Estadual Paulista Júlio de Mesquita Filho
dc.identifierhttp://dx.doi.org/10.1111/aec.13377
dc.identifier.citationAustral Ecology.
dc.identifier.doi10.1111/aec.13377
dc.identifier.issn1442-9993
dc.identifier.issn1442-9985
dc.identifier.scopus2-s2.0-85161394097
dc.identifier.urihttp://hdl.handle.net/11449/247549
dc.language.isoeng
dc.relation.ispartofAustral Ecology
dc.sourceScopus
dc.subjectactivity
dc.subjectarboreal mammal
dc.subjectBradypus torquatus
dc.subjectfolivore
dc.subjectthermal response
dc.titleCombined effect of ambient temperature and solar radiation on maned sloths' behaviour and detectabilityen
dc.typeArtigo
unesp.author.orcid0000-0003-3924-6481[1]
unesp.author.orcid0000-0003-1470-3674[6]

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