The evolution of search modes: Ecological versus phylogenetic perspectives

Authors
Citation
G. Perry, The evolution of search modes: Ecological versus phylogenetic perspectives, AM NATURAL, 153(1), 1999, pp. 98-109
Citations number
94
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
AMERICAN NATURALIST
ISSN journal
0003-0147 → ACNP
Volume
153
Issue
1
Year of publication
1999
Pages
98 - 109
Database
ISI
SICI code
0003-0147(199901)153:1<98:TEOSME>2.0.ZU;2-0
Abstract
Both theoretical and empirical studies, many of them on lizards, suggest th at foraging behaviors often take one of two forms, sometimes called "modes' ": active search or sedentary ambush. I tested this by expanding the databa se on lizard foraging behaviors and testing for the existence of modality i n this much larger database. My findings did not support the validity of so me previous analyses. Greatly expanded lizard data did not show a bimodal d istribution of foraging behaviors. Phylogeny, however, was a strong predict or of behavior. One clads, Autarchoglossa, was characterized by a wide rang e of Foraging behaviors, but closely related species tended to exhibit simi lar behaviors. Two other clades, Iguania and Gekkota, retain the ancestral sedentary behavior. This phylogenetic trend,combined with phylogenetically biased sampling may have been responsible for the appearance of bimodality in previous studies. Thus, bimodality of search modes is rejected, Some pre vious generalizations regarding correlates of foraging "mode" need to be re evaluated in this light.