. Breviora. 1979 A COMPARISON OF ANOLIS LIZARDS 33 a I/) o z. Sexual Dimorphism Ratio Fig. 10. dimorphism (male SVL female SVL) ratios for Greater Antillean (solid line) and mainland (South and Central America) (dashed line) Anolis. Data for the Greater Antillean species are from Schoener (unpublished measurement tables, only species with a sample size of 15 or more individuals were used). Data for mainland species are given in Table 12. also a conservative test of the prediction that island anoles will have higher SDR's than mainland anoles (Table 1) because of lower
. Breviora. 1979 A COMPARISON OF ANOLIS LIZARDS 33 a I/) o z. Sexual Dimorphism Ratio Fig. 10. dimorphism (male SVL female SVL) ratios for Greater Antillean (solid line) and mainland (South and Central America) (dashed line) Anolis. Data for the Greater Antillean species are from Schoener (unpublished measurement tables, only species with a sample size of 15 or more individuals were used). Data for mainland species are given in Table 12. also a conservative test of the prediction that island anoles will have higher SDR's than mainland anoles (Table 1) because of lower SDR's in the Greater Antilles than on the one- and two-species islands of the Lesser Antilles (Schoener, 1977). Island species are found to have significantly greater sexual dimorphism ratios than do mainland species (p ^ .001, 2X2 Chi- squared test, Siegal 1956). Fitch (1976) has also measured SDR's of mainland Anolis. Excluding those species for which I present data, the range of SDR's () and mean SDR () for the tropical anoles in his data set are very similar to mine (Fig. 10) and further support the prediction of relatively high sexual dimorphism ratios for island Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. , Museum of Comparative Zoology, Harvard University
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