Record Details

Day, Mark L;Thorpe, Roger S
Population differentiation of Iguana delicatissima and I. iguana in the Lesser Antilles
Contributions to West Indian Herpetology. A Tribute to Albert Schwartz
Book Section
Robert Powell and Robert W Henderson
Society for the Study of Amphibians and Reptiles
Ithaca, New York
Iguana delicatissima;Iguana iguana
Multivariate analysis of body dimensions, scalation, and color patterns, in combination with DNA methods, were used to investigate geographic variation in nine populations of the Lesser Antillean Iguana (Iguana delicatissima) and seven populations of the common iguana (I. iguana) from the Eastern Caribbean. Multivariate analysis revealed less morphological variation in I. delicatissima than in I. iguana, but matrix correlation (Mantel tests) indicated a significant association between facets of this variation and climatic variation in I. delicatissima. Direct sequencing of a section of the mtDNA cytochrome b gene revealed no variation among I. delicatissima populations, but analysis of the region is continuing. The section of cytochrome b investigated revealed 13% bp differences between I. delicatissima and I. iguana. Hybrids between these two species on Les lies des Saintes, Guadeloupe were detected by multivariate and molecular methods. This hybridization may be occurring rapidly and could result in local extinctions of I. delicatissima.