ESJ58 一般講演（口頭発表） H1-05

The use of morphometrics in the analysis of ecomorphology

*Sievwright, H （University of Tokyo）, Higuchi, H （University of Tokyo）

Accurate description of the morphology of organisms is vital in studies of morphological adaptation and taxonomy. Morphometric techniques provide the tools needed to summarise and quantify morphological variation between organisms. These can be divided into traditional, measurement-based techniques and geometric morphometric techniques which use 2D or 3D coordinate points to plot the relative positions of landmarks, curves and surfaces on specimens. Here we present examples of how various morphometric techniques are used to relate morphological variation to ecological variation in birds of prey. Traditional linear measurement based methods and landmark based relative warps analysis are used to identify differences in head and wing morphology between species with different feeding behaviours and migratory strategies. We look in particular at the unusual morphology of Oriental Honey Buzzards. We also describe how new developments in 3D imaging and morphometric methods allow us to examine between species differences in the wing bone shape of birds of prey with different flight requirements. We explain the relative advantages and disadvantages of using traditional and geometric methods and how future developments may impact on the field of ecomorphology.