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Title: Thyroid gland development in a neotenic goby (ice goby, Leucopsarion petersii) and a common goby (Ukigori, Gymnogobius urotaenia) during early life stages
Authors: Harada, Yasuko
Kinoshita, Izumi
Kaneko, Toyoji
Moriyama, Shunsuke
Tanaka, Masaru
Tagawa, Masatomo  kyouindb  KAKEN_id  orcid (unconfirmed)
Author's alias: 田川, 正朋
Keywords: neoteny
ice goby (Leucopsarion petersii)
ukigori (Gymnogobius urotaenia)
digestive tract
Issue Date: Jul-2003
Publisher: Zoological Society of Japan
Journal title: Zoological Science
Volume: 20
Issue: 7
Start page: 883
End page: 888
Abstract: In order to study the characteristics of neoteny in teleosts, development of the thyroid system and digestive tract of a neotenic goby (ice goby, Leucopsarion petersii) and a non-neotenic goby (ukigori, Gymnogobius urotaenia) were compared. In juvenile ukigori, the intestine was found to be convoluted once in the antero-midpart, and gastric glands were present. In the ice goby, the alimentary canal was straight, and no gastric gland was observed even in adult, suggesting that the ice goby retains larval features, not only in appearance but also in internal organs. A marked difference was also found in the thyroid system. In ukigori, activity of the thyroid gland and thyroid stimulating hormone (TSH) cells increased between flexion and postflexion larval phases. However, in the ice goby, thyroid glands remained inactive, and no TSH cells were observed. A delayed development of the thyroid system was suggested as a major factor contributing to neoteny in the ice goby.
Rights: (c) 日本動物学会 / Zoological Society of Japan
DOI(Published Version): 10.2108/zsj.20.883
Appears in Collections:Zoological Science

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