Thyroid Gland Development in a Neotenic Goby (Ice Goby, Leucopsarion petersii) and a Cimmon Goby (Ukigori, Gymnogobius urotaenia) during Early Life Stages

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Author(s)

    • Harada Yasuko HARADA Yasuko
    • Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University
    • Harada Shigeo HARADA Shigeo
    • Fisheries Division, Department of Agriculture, Forestry and Fisheries Fisheries Division, Department of Agriculture, Firestry and Fosheries
    • TANAKA Masaru
    • Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University
    • TAGAWA Masatomo
    • Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University

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.

Journal

  • ZOOLOGICAL SCIENCE

    ZOOLOGICAL SCIENCE 20(7), 883-888, 2003-07-25

    Zoological Society of Japan

References:  18

Cited by:  2

Codes

  • NII Article ID (NAID)
    110006162767
  • NII NACSIS-CAT ID (NCID)
    AA10545874
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    02890003
  • NDL Article ID
    6624292
  • NDL Source Classification
    ZR4(科学技術--生物学--動物)
  • NDL Call No.
    Z53-Y164
  • Data Source
    CJP  CJPref  NDL  NII-ELS  IR  J-STAGE  NDL-Digital 
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