Abstract:
:Feeding specializations such as herbivory are an often cited example of convergent and adaptive evolution. However, some groups such as lizards appear constrained in the evolution of morphological specializations associated with specialized diets. Here we examine whether the inclusion of plant matter into the diet of omnivorous lacertid lizards has resulted in morphological specializations and whether these specializations reflect biomechanical compromises as expected if omnivores are constrained by functional trade-offs. We examined external head shape, skull shape, tooth structure, intestinal tract length and bite performance as previous studies have suggested correlations between the inclusion of plants into the diet and these traits. Our data show that omnivorous lacertid lizards possess modifications of these traits that allow them to successfully exploit plant material as a food source. Conversely, few indications of a compromise phenotype could be detected, suggesting that the evolution towards herbivory is only mildly constrained by functional trade-offs.
journal_name
J Evol Bioljournal_title
Journal of evolutionary biologyauthors
Herrel A,Vanhooydonck B,Van Damme Rdoi
10.1111/j.1420-9101.2004.00758.xkeywords:
subject
Has Abstractpub_date
2004-09-01 00:00:00pages
974-84issue
5eissn
1010-061Xissn
1420-9101pii
JEB758journal_volume
17pub_type
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