| molecular evidence for ecological speciation in tropical habitats. | recent research on rainforest speciation has highlighted the importance of habitat variation in generating population diversification but lacks evidence of an associated reduction in gene flow. this paper describes a study in which molecular markers were used to examine the effects of allopatric divergence and habitat on levels of gene flow in the caribbean lizard, anolis roquet. three study transects were constructed to compare variation in microsatellite allele frequencies and morphology acros ... | 2002 | 12370440 |
| phylogeny, paraphyly and ecological adaptation of the colour and pattern in the anolis roquet complex on martinique. | martinique is an environmentally heterogeneous island with a complex geological history. it is occupied by a solitary anole, anolis roquet, showing marked geographical variation in colour and other features. phylogenetic analysis of a segment (1 kb) of the mitochondrial cytochrome b gene across the anolis roquet series in the southern lesser antilles and at 63 localities of anolis roquet in martinique indicate that a. roquet is paraphyletic as a. extremus (barbados) is nested within the martiniq ... | 2003 | 12492882 |
| the roles of allopatric divergence and natural selection in quantitative trait variation across a secondary contact zone in the lizard anolis roquet. | populations of the caribbean lizard, anolis roquet, are thought to have experienced long periods of allopatry before recent secondary contact. to elucidate the effects of past allopatry on population divergence in a. roquet, we surveyed parallel transects across a secondary contact zone in northeastern martinique. we used diagnostic molecular mitochondrial dna markers to test fine-scale association of mitochondrial dna lineage and geological region, multivariate statistical techniques to explore ... | 2008 | 19120993 |
| a phylogenetic analysis of body size evolution in the anolis roquet group (sauria: iguanidae): character displacement or size assortment? | the important role that competition plays in structuring communities is well documented; however, the role of competition in an evolutionary context remains unclear. evolutionary investigations into the role of competition have often focused on the process of character displacement, and a good example of this is the evolution of body size in the anolis lizards of the caribbean islands. previous work on the a. roquet species group has taken a phylogenetic approach and concluded that patterns of b ... | 2000 | 10672163 |
| enzyme function and polymorphism: a test in two anolis lizard species. | electrophoretic surveys of two lizard species were used to test hypotheses that relate levels of enzyme variability to enzyme function (single-substrate versus multiple-substrate enzymes, regulatory versus nonregulatory enzymes). anolis roquet behaviorally regulates its body temperature, but its congener a. gundlachi is passive to variations in the thermal environment. as a result, populations of a. gundlachi probably experience the thermal environment as temporally coarse-grained, whereas popul ... | 1984 | 6712589 |
| development of microsatellite markers in the st lucia anole, anolis luciae. | anolis lizards are important models in studies of ecology and evolution. here we describe 13 polymorphic microsatellites for use in population screening in the st lucia anole, anolis luciae, that can be used as a natural replicate to anolis roquet on martinique to study processes involved in population differentiation and speciation. genotyping of 32 individuals using m13 tails and fam-labelled universal m13 primers showed that all loci were polymorphic with high genetic diversity, averaging at ... | 2008 | 21586060 |
| microsatellite data show evidence for male-biased dispersal in the caribbean lizard anolis roquet. | dispersal is a key component of an organism's life history and differences in dispersal between sexes appear to be widespread in vertebrates. however, most predictions of sex-biased dispersal have been based on observations of social structure in birds and mammals and more data are needed on other taxa to test whether these predictions apply in other organisms. caribbean anole lizards are important model organisms in various biological disciplines, including evolutionary biology. however, very l ... | 2008 | 18803592 |
| [studies of the changes of color in the lizard, anolis roquet lacépède]. | | 1958 | 13550186 |