Data/hora: 13/06/2024 04:08:07

Provedor de dados: | 103
País: | Brazil
Título: | Thermoregulation and activity pattern of the high-mountain lizard Phymaturus palluma (Tropiduridae) in Chile
Autores: | Vidal,Marcela A.; Habit,Evelyn; Victoriano,Pedro; González-Gajardo,Angélica; Ortiz,Juan C.
Data: | 2010-02-01
Ano: | 2010
Palavras-chave: | Age classes; Daily activity; Sexual dimorphism.
Resumo: | Behavioral and physiological mechanisms of thermoregulation in ectotherms are conditioned by thermal constraints. These mechanisms may be even more restrictive when environmental conditions are unfavorable for individuals, especially when sexual dimorphism segregates the sexes spatially. In order to understand behavioral and physiological regulation mechanisms, we investigated the thermal biology of Phymaturus palluma (Molina, 1782), a sexually size dimorphic, high-mountain lizard that inhabits extreme climatic conditions. P. palluma showed a bimodal activity pattern, a major peak in the morning (11:00-13:30h) and in the afternoon (15:30-18:00 h). The lizards were more active when substrate temperatures were between 25 and 28º C. The highest abundance was found around 27º C (between 11:00-12:30). Females showed greater activity than males in the early morning. Sub-adults and juveniles did not show differences in their activity pattern. There was a positive relationship between body temperature and air and substrate temperatures, suggesting typically thigmothermal regulation.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000100003
Editor: | Sociedade Brasileira de Zoologia
Relação: | 10.1590/S1984-46702010000100003
Formato: | text/html
Fonte: | Zoologia (Curitiba)  v.27 n.1 2010
Fonte: | info:eu-repo/semantics/openAccess