Autor(es)

Almeida, Maria Camila ^[1] ; Cruz-Neto, Ariovaldo P. ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, Biosci Inst, Dept Zool, Rio Claro, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Thermal Biology; v. 36, n. 4, p. 225-231, May 2011.
• Área do conhecimento: Ciências Biológicas - Fisiologia
• Citações Web of Science: 9
• Assunto(s): Morcegos

Resumo

This study evaluated the thermogenic capacity of three species of fruit-eating phyllostomid bats (Carollia perspicillata, Sturnira lilium and Artibeus lituratus) during the dry-cool and wet-warm seasons, by measuring changes in body mass, basal metabolic rate (BMR), maximal metabolic rate (MMR), nonshivering thermogenesis and shivering thermogenesis. Body mass was lower, on average, during the dry-cool season and all species of fruit-eating bats showed an increase in oxygen consumption after noradrenaline injection and after exposure to a He–O2 atmosphere. However, the magnitude of this increase was similar in both seasons. BMR also did not vary between seasons. Although, our results showed for the first time that all three species studied were able to increase thermogenesis by both nonshivering and shivering thermogenesis, we did not find significant differences in any thermoregulatory variable measured when comparing data from the two different seasons. Probably the difference in the mean and variance of the temperature profile between seasons were not strong enough to alter the thermogenic capacity of these species. Furthermore, the use of alternative physiological (torpor) or behavioral (huddling) strategies might have alleviated the need to trigger energetic-costly thermogenic responses. (AU)

• Processo FAPESP: 07/50642-8 - Plasticidade fenotípica em caracteres fisiológicos: análise integrativa da capacidade termogênica em 3 espécies de morcegos frugívoros
• Beneficiário: Ariovaldo Pereira da Cruz-Neto
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 06/59107-5 - Avaliação do efeito da variação sazonal sobre a capacidade termogênica em morcegos
• Beneficiário: Maria Camila Almeida
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado