. Bulletin of the British Ornithologists' Club. Luis A. Sanchez-Gonzalez et al. 39 2007 127(1) < CO. Figure 4. Principal Component Analysis of morphometric characters for the C. ophthalmicus complex in Mesoamerica. OGU acronyms refer to those used in Fig. lb. Results Correlation coefficients indicated no redundancy between variables (highest r = ), so all six morphometric characters were analysed. Kolmogorov-Smimov tests revealed that all morphometric characters were normally distributed (P<). ANOVAs indicated significant sexual dimorphism in size (males average larg
. Bulletin of the British Ornithologists' Club. Luis A. Sanchez-Gonzalez et al. 39 2007 127(1) < CO. Figure 4. Principal Component Analysis of morphometric characters for the C. ophthalmicus complex in Mesoamerica. OGU acronyms refer to those used in Fig. lb. Results Correlation coefficients indicated no redundancy between variables (highest r = ), so all six morphometric characters were analysed. Kolmogorov-Smimov tests revealed that all morphometric characters were normally distributed (P<). ANOVAs indicated significant sexual dimorphism in size (males average larger) in all populations except STux (P<), so all morphometric analyses were conducted for the two sexes separately. However, herein we present only results for males, given that results were similar for both sexes and that sample sizes were considerably smaller for females. Morphometric characters that generally reflect body size (BL, WC, TAIL) showed clinal increases from north to south (Fig. 2), such as in populations from the Sierra Madre Oriental (NHgo increasing in size south to NOax). Individuals from western Mexican populations (SMS) were largest in several morphometric dimensions (BL, WC, TAIL). Although the general pattern within Mexico is of. 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 British Ornithologists' Club. London : British Ornithologists' Club
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