Differences in the Skull Morphology between Juvenile and Adult Green Turtles: Implications for the Ontogenetic Diet Shift

Hideaki Nishizawa; Masakazu Asahara; Naoki Kamezaki; Nobuaki Arai

doi:10.3105/018.029.0205

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Hideaki Nishizawa,^1,* Masakazu Asahara,² Naoki Kamezaki,³ Nobuaki Arai¹

¹1Department of Social Informatics,Graduate School of Informatics, Kyoto University, Kyoto 606-8501,
²2Department of Zoology, Graduate School of Science, Kyoto University, Kyoto 606-8502, JAPAN
³3Sea Turtle Association of Japan, Hirakata, Osaka 573-0163, JAPAN

^*Corresponding author. Tel: +81-75-753-3137; Fax: +81-75-753-3133; E-mail address: nishizawa0311@gmail.com

Abstract

Skull morphology was compared between juvenile and adult green turtles by geometric morphometrics. The size of the orbit and length of the supraoccipital in relation to the centroid size were larger in juveniles than in adults, while the relative sizes of the infratemporal fossae and parietal were larger in the latter than in the former. The difference in the relative length of the supraoccipital did not predict the maintenance of functional equivalence of trophic structures, probably reflecting a functional trophic change with growth.

Citation Download Citation

Hideaki Nishizawa, Masakazu Asahara, Naoki Kamezaki, and Nobuaki Arai "Differences in the Skull Morphology between Juvenile and Adult Green Turtles: Implications for the Ontogenetic Diet Shift," Current Herpetology 29(2), 97-101, (1 December 2010). https://doi.org/10.3105/018.029.0205

Accepted: 1 October 2010; Published: 1 December 2010

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