Bite performance surfaces of three ecologically divergent Iguanidae lizards: relationships with lower jaw bones

Autor(es)

Simon, Monique Nouailhetas ^{[1, 2]} ; Brandt, Renata ^[3] ; Kohlsdorf, Tiana ^[3] ; Arnold, Stevan J. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Biosci Inst, Dept Genet & Evolutionary Biol, Rua Matao 277, BR-05508090 Butanta, SP - Brazil

^[2] Oregon State Univ, Dept Integrat Biol, Corvallis, OR 97331 - USA

^[3] Univ Sao Paulo, FFCLRP, Dept Biol, Ave Bandeirantes 3900, Ribeirao Preto - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Biological Journal of the Linnean Society; v. 127, n. 4, p. 810-825, AUG 2019.
• Citações Web of Science: 0

Resumo

Traits that interact to perform an ecologically relevant function are expected to be under multivariate non-linear selection. Using the lower jaw morphology as a biomechanical model, we test the hypothesis that lower jaw bones of lizards are subjected to stabilizing and correlational selection, associated with mechanical advantage and maximum bite force. We used three closely related tropidurine species that differ in size, head shape and microhabitat: Eurolophosaurus nanuzae, Tropidurus hispidus and Tropidurus semitaeniatus. We predicted a common pattern of correlational selection on bones that are part of in-levers or part of the out-lever of the lower jaw. The predicted pattern was found in E. nanuzae and T. hispidus, but this could not be shown to be statistically significant. For T. semitaeniatus, we found significant disruptive selection on a contrast involving the surangular, and also significant directional selection on linear combinations of traits in all species. The results indicate that the non-linear selection on lower jaw bones does not reflect an optimum to enhance mechanical advantage in all species. Divergent functional demands and specific ecological contexts of species seem relevant in shaping patterns of selection on morphology. (AU)

• Processo FAPESP: 15/19556-4 - Modularidade, Desempenho Funcional e Seleção Natural: integrando genética quantitativa e ecofisiologia para entender a evolução morfológica de lagartos tropiduríneos
• Beneficiário: Monique Nouailhetas Simon
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 16/22159-0 - Desempenho funcional e modularidade morfológica: como seleção no desempenho contribui para as interações entre caracteres
• Beneficiário: Monique Nouailhetas Simon
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 15/07650-6 - Ecologia, evolução e desenvolvimento (Eco-Evo-Devo) na herpetofauna brasileira
• Beneficiário: Tiana Kohlsdorf
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/14125-0 - Análise integrativa do dimorfismo sexual em lagartos: morfologia, significado funcional e seleção
• Beneficiário: Renata Brandt Nunes
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado