Color Expression on Dorsal Skin of Japanese Tree Frogs

URI http://cur-ren.cjc.ac.jp/metadata/122
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Title
Color Expression on Dorsal Skin of Japanese Tree Frogs
Author
著者 Shirakata Yoshinori
著者(別表記) Shirakata Yoshinori
著者 上島 孝久
著者(別表記) Kamishima Yoshihisa
Abstract

Japanese tree frogs are known to change their body color readily according to external (ambient) or internal (mental) conditions. The coloration of the frog skin is shown by pigment cells distributed under the epidermis. Pigment cells in amphibians are classified into three types: melanophores, iridophores and xantophores. These pigment cells in the dorsal skin are formed chromatophore units, each of which consists of three different types of pigment cells. In the chromatophore unit, these pigment cells are layered one on the other: that is, a melanophore on the innermost layer, a xanthophore on the outermost and an iridophore in the middle. Various colors of the chromatophore unit combines spectra from each pigment cell, and the total skin color of a certain area results from a combination of colors from chromatophore units in the area. In this study, we examined how the chromatophore unit can show various colors, and to what extent it can exhibit a color range in relation to its component pigment cells. We also examined the total skin coloration in relation to the chromatophore unit deduced by computer calibration. It was also determined that the various patterns of brown or black stripes, which appeared against the green background skin, were caused by differences of MSH sensitivities of melanophores in the skin area.

Subject
480 Zoology
Keyword
Tree frogs
skin color
chromatophore unit
color exhibition
pattern formation
Publish Date
2006
Publication Title
Chugokugakuen journal
Volume
5
Start Page
17
End Page
21
ISSN
1348-1452
NCID
AA11806612
Publisher
中国学園大学/中国短期大学
Copyright Holders
中国学園大学/中国短期大学
Official URL
Contents Type
Departmental Bulletin Paper
language
English
File Version
publisher