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タイトル: | Thyroid gland development in a neotenic goby (ice goby, Leucopsarion petersii) and a common goby (Ukigori, Gymnogobius urotaenia) during early life stages |
著者: | Harada, Yasuko Kinoshita, Izumi Kaneko, Toyoji Moriyama, Shunsuke Tanaka, Masaru Tagawa, Masatomo https://orcid.org/0000-0002-5623-2420 (unconfirmed) |
著者名の別形: | 田川, 正朋 |
キーワード: | neoteny ice goby (Leucopsarion petersii) ukigori (Gymnogobius urotaenia) thyroid digestive tract |
発行日: | Jul-2003 |
出版者: | Zoological Society of Japan |
誌名: | Zoological Science |
巻: | 20 |
号: | 7 |
開始ページ: | 883 |
終了ページ: | 888 |
抄録: | 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. |
著作権等: | (c) 日本動物学会 / Zoological Society of Japan |
URI: | http://hdl.handle.net/2433/57206 |
DOI(出版社版): | 10.2108/zsj.20.883 |
出現コレクション: | Zoological Science |
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