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Head Movements During Visual Orienting Toward Moving Prey in the Lizard Takydromus tachydromoides.
Fukudome, Miyuki; Yamawaki, Yoshifumi.
Afiliação
  • Fukudome M; Department of Biology, Faculty of Science, Kyushu University, Fukuoka 819-0395, Japan.
  • Yamawaki Y; Department of Biology, Faculty of Science, Kyushu University, Fukuoka 819-0395, Japan.
Zoolog Sci ; 34(6): 468-474, 2017 Dec.
Article em En | MEDLINE | ID: mdl-29219036
It is important to investigate visual orienting in reptiles to better understand the basic organization of the oculomotor system in vertebrates. However, quantitative analyses of visual orienting behavior in reptiles have rarely been conducted, except in chameleons. In the present study, we videorecorded the head and body movements of the lizard Takydromus tachydromoides during visual tracking of moving prey and analyzed them frame-by-frame. Before approaching prey, visual tracking mainly consisted of brief intermittent turns of the head (saccade). After the head saccades, the angular position of the prey relative to the lizard head was kept at 10-70° (laterally) in most cases, rather than at 0° (in front). In addition, the ratio of the amplitude of the head saccades to prey position was 0.2-0.3, which is much smaller than 1, suggesting that the head did not orient exactly toward the prey after most saccades. These results were observed under both white (homogeneous) and grating (structured) backgrounds. Possible functions of head saccades in the lizard are discussed.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Comportamento Predatório / Movimentos da Cabeça / Lagartos Limite: Animals Idioma: En Revista: Zoolog Sci Assunto da revista: BIOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Japão

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Comportamento Predatório / Movimentos da Cabeça / Lagartos Limite: Animals Idioma: En Revista: Zoolog Sci Assunto da revista: BIOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Japão