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Statements

Subject Item
n2:RIV%2F00216208%3A11310%2F08%3A10132686%21RIV13-MSM-11310___
rdf:type
skos:Concept n14:Vysledek
rdfs:seeAlso
http://www.sciencedirect.com/science/article/pii/S094420060800055X
dcterms:description
Anolis lizards have become a model system for the study of adaptive radiations as species with similar morphologies occupying similar habitats have arisen independently on all the larger islands in the Caribbean. However, on both, Cuba and Hispaniola unique forms have evolved that seemingly have no counterparts on any of the other Caribbean islands. Anoles of the genus Chamaeleolis comprise such a unique form and have been termed 'twig giants' because of their cryptic life style, slow locomotor mode, and short limbs. However, some of the most unusual features of these lizards are their large heads and molluscivorous diet. Here, we compare head shape, bite force, and muscle structure among sexes and age classes of Chamaeleolis lizards with Anolis crown giants. Our date show that Chamaeleolis lizards have a dramatically different head shape characterized by tall heads with a pronounced temporal ridge and long snouts. Analyses of bite force, surprisingly, show no differences between adult Chamaeleolis and Anolis crown giants. Juveniles of Chamaeleolis, however, have very tall heads for their size and bite harder than Anolis juveniles do. This can be related to the propensity of juveniles of this genus to eat snails, food items for which high bite forces are crucial. This observation is corroborated by the presence of well-developed jaw adductors in juveniles. Thus, our data suggest that the unusual phenotype of adults with large and tall heads may be due to selection on the juvenile life history stages. (C) 2008 Elsevier GmbH. All rights reserved. Anolis lizards have become a model system for the study of adaptive radiations as species with similar morphologies occupying similar habitats have arisen independently on all the larger islands in the Caribbean. However, on both, Cuba and Hispaniola unique forms have evolved that seemingly have no counterparts on any of the other Caribbean islands. Anoles of the genus Chamaeleolis comprise such a unique form and have been termed 'twig giants' because of their cryptic life style, slow locomotor mode, and short limbs. However, some of the most unusual features of these lizards are their large heads and molluscivorous diet. Here, we compare head shape, bite force, and muscle structure among sexes and age classes of Chamaeleolis lizards with Anolis crown giants. Our date show that Chamaeleolis lizards have a dramatically different head shape characterized by tall heads with a pronounced temporal ridge and long snouts. Analyses of bite force, surprisingly, show no differences between adult Chamaeleolis and Anolis crown giants. Juveniles of Chamaeleolis, however, have very tall heads for their size and bite harder than Anolis juveniles do. This can be related to the propensity of juveniles of this genus to eat snails, food items for which high bite forces are crucial. This observation is corroborated by the presence of well-developed jaw adductors in juveniles. Thus, our data suggest that the unusual phenotype of adults with large and tall heads may be due to selection on the juvenile life history stages. (C) 2008 Elsevier GmbH. All rights reserved.
dcterms:title
Cranial morphology and bite force in Chamaeleolis lizards - Adaptations to molluscivory? Cranial morphology and bite force in Chamaeleolis lizards - Adaptations to molluscivory?
skos:prefLabel
Cranial morphology and bite force in Chamaeleolis lizards - Adaptations to molluscivory? Cranial morphology and bite force in Chamaeleolis lizards - Adaptations to molluscivory?
skos:notation
RIV/00216208:11310/08:10132686!RIV13-MSM-11310___
n4:aktivita
n10:I
n4:aktivity
I
n4:cisloPeriodika
6
n4:dodaniDat
n11:2013
n4:domaciTvurceVysledku
n13:7884532
n4:druhVysledku
n9:J
n4:duvernostUdaju
n15:S
n4:entitaPredkladatele
n16:predkladatel
n4:idSjednocenehoVysledku
361509
n4:idVysledku
RIV/00216208:11310/08:10132686
n4:jazykVysledku
n6:eng
n4:klicovaSlova
Anolis; Feeding; Bite force; Head shape
n4:klicoveSlovo
n5:Bite%20force n5:Feeding n5:Head%20shape n5:Anolis
n4:kodStatuVydavatele
DE - Spolková republika Německo
n4:kontrolniKodProRIV
[12B1BB6516C2]
n4:nazevZdroje
Zoology
n4:obor
n19:EG
n4:pocetDomacichTvurcuVysledku
1
n4:pocetTvurcuVysledku
2
n4:rokUplatneniVysledku
n11:2008
n4:svazekPeriodika
111
n4:tvurceVysledku
Hříbalová, Veronika Herrel, Anthony
n4:wos
000260222100005
s:issn
0944-2006
s:numberOfPages
9
n7:doi
10.1016/j.zool.2008.01.002
n12:organizacniJednotka
11310