| Full text | |
| Author(s): |
Simon, Monique Nouailhetas
[1, 2]
;
Brandt, Renata
[3]
;
Kohlsdorf, Tiana
[3]
;
Arnold, Stevan J.
[2]
Total Authors: 4
|
| Affiliation: | [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
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Biological Journal of the Linnean Society; v. 127, n. 4, p. 810-825, AUG 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
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) | |
| FAPESP's process: | 15/19556-4 - Modularity, Functional Performance and Natural Selection: integrating quantitative genetics and ecophysiology to understand the morphological evolution of tropidurinae lizards |
| Grantee: | Monique Nouailhetas Simon |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 16/22159-0 - Insights of functional performance into morphological modularity: how does selection for performance contribute to trait interactions? |
| Grantee: | Monique Nouailhetas Simon |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |
| FAPESP's process: | 15/07650-6 - Ecology, evolution and development (Eco-Evo-Devo) in the Brazilian herpetofauna |
| Grantee: | Tiana Kohlsdorf |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 13/14125-0 - Integrative analysis of sexual dimorphism in lizards: morphology, functional significance and selection |
| Grantee: | Renata Brandt Nunes |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |