AI Article Synopsis
- Positive allometry in signaling traits, like the size of lizard dewlaps, suggests evidence for sexual selection, but research on interspecific differences among similar species is limited.
- The study found that dewlap size increases relative to body size in lizards, indicating positive allometry.
- Coexisting species show divergent scaling relationships, whereas species that are ecologically similar exhibit similar dewlap allometric patterns, suggesting that these scaling relationships reflect broader trends in anole evolution.
Article Abstract
Positive allometry of signalling traits has often been taken as evidence for sexual selection. However, few studies have explored interspecific differences in allometric scaling relationships among closely related species that vary in their degree of ecological similarity. lizards possess an elaborate retractable throat fan called a dewlap that is used for visual communication and differs greatly in size and colour among species. We observed that dewlaps demonstrate positive allometry: relative dewlap size increases with body size. We also observed that coexisting species are divergent in signal size allometries, while convergent species-similar in other aspects of ecology, morphology and behaviour-typically share similar dewlap allometric scaling relationships. These patterns suggest that dewlap scaling relationships may follow the same pattern as other traits in the anole radiation, where ecologically different sympatric species have evolved a suite of divergent traits.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10320661 | PMC |
| http://dx.doi.org/10.1098/rsbl.2023.0160 | DOI Listing |
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