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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Sprint performance of a generalist lizard running on different substrates: grip matters

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Autor(es):
Brandt, R. [1] ; Galvani, F. [1] ; Kohlsdorf, T. [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, FFCLRP, Dept Biol, BR-14040901 Ribeirao Preto, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: Journal of Zoology; v. 297, n. 1, p. 15-21, SEP 2015.
Citações Web of Science: 9
Resumo

The relationships between locomotor performance and major features of environmental structure, such as incline and diameter, have been consistently identified in several vertebrate groups. The effects of variation in characteristics such as texture and structural complexity, in contrast, remain neglected, and associations between sprint speeds achieved during steady-level locomotion and the way an animal grips the surface are particularly obscure. In the present study, we have used the habitat generalist lizard Tropidurus torquatus to test the hypothesis that animals run faster on the substrates where gripping performance is higher. We ran 18 individuals on seven different substrates (wood, thin and coarse sand, coarse gravel, rock, leaf litter and grass) and recorded their maximum speeds using high-speed cameras. Surfaces were characterized for height variation and grip, the last given by average grip performance achieved by lizards of different sizes. Maximum sprint speeds were highest on rock and grass and lowest on thin and coarse sand, and variation in performance among substrates was explained by grip: substrates in which lizards gripped stronger are those that enhanced average maximum sprint speed. This study is the first report providing evidence for variation in maximum sprint speeds achieved by a generalist lizard running on different substrates, and demonstrates how friction resulting from the interaction of the lizard with the substrate may be critically important for sprint speed. (AU)

Processo FAPESP: 13/14125-0 - Análise integrativa do dimorfismo sexual em lagartos: morfologia, significado funcional e seleção
Beneficiário:Renata Brandt Nunes
Linha de fomento: Bolsas no Brasil - Pós-Doutorado