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EGG SIZE AND EGG SHAPE IN NEAR-EASTERN GEKKONID LIZARDS

in Israel Journal of Ecology and Evolution
Autor:in:
YEHUDAH L. WERNER Department of Zoology (Sturman Building), The Hebrew University of Jerusalem

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Gekkoninae, laying rigid, precisely mensurable eggs in invariable clutches, served to examine the relations between egg shape, egg size and mother size, at intra—and interspecific levels. Ellipticity (ratio width/length) and volume were calculated from linear measurements of 82 eggs obtained in captivity from geckos of eleven Near-Eastern taxa. Clutch volume, apportioned to one or two eggs, was interspecifically correlated to maternal length. Eggs varied in size, intra—and interspecifically, generally retaining near-uniform ellipticity but some exceedingly large eggs were more elongate. In Ptyodactylus hasselquistii guttatus the eggs, flexible when laid, are pushed by the mother into near-spherical shape; hatchling length is correlated to egg diameter. Gecko clutches constitute as much mass, relative to maternal mass, as in many other lizard groups.

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