Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Seasonal Change of the Skin Morphology of Muddy Loach, Misgurnus anguillicaudatus(Cobitidae) from Korea

계절변화에 따른 한국산 미꾸리, Misgurnus anguillicaudatus 피부의 조직학적 연구

  • Oh, Min-Gi (Faculty of Biological Science and Institute for Biodiversity Research, College of Natural Sciences, Chonbuk National University) ;
  • Park, Jong-Young (Faculty of Biological Science and Institute for Biodiversity Research, College of Natural Sciences, Chonbuk National University)
  • 오민기 (전북대학교 자연과학대학 생물과학부.생물다양성연구소) ;
  • 박종영 (전북대학교 자연과학대학 생물과학부.생물다양성연구소)
  • Received : 2008.05.14
  • Accepted : 2008.06.16
  • Published : 2008.06.30
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Abstract

The histological morphology on the skin of Misgurnus anguillicaudatus was described in the three regions such as dorsal, lateral, occiput and subsequently morphological variations of the skin were monthly observed for a year. The skin consisted of epidermis having epithelial cell, club cell and mucus cell, and dermis of mainly connective tissue fiber, embedded scale and blood capillary. Unicellular mucus cells situated at the epidermis underwent seasonal change in its size, as well as number and amounts of mucus-secreting materials, which they greatly increased in winter, but did not in summer. As it is getting cold, the mucus cells' shape changed from initial spherical to oval or elongated form. Such considerable changes in the mucus cell were particularly most evident in the occiput during winter. Moreover, the dermis largely thickened about 2~3 times in winter than in summer. Based on these results, we discussed function for the mucus on what it mainly acts in nature and information on whether mucus cells' seasonal variations affect on hibernation and cutaneous respiration.

미꾸리 M. anguillicaudatus의 등, 후두부, 체측 부위에서 적출한 피부조직의 형태를 분석하여 계절의 변화에 따른 각 부위 조직의 형태변화를 관찰하였다. 각 피부조직은 점액세포를 포함한 상피세포들로 구성된 표피층과 결합조직의 진피층으로 구성되어 있었으며, 표피와 진피층의 경계에 모세혈관이 분포하고 있었다. 표피의 middle layer에 분포하는 점액세포는 수온이 낮아짐에 따라 그 형태가 원형에서 타원형 또는 장타원형으로 변화하였고, 단위면적당 세포의 개수와 크기 및 분비량이 증가하였는데, 특히 후두부에서 그 변화양상이 가장 크게 나타났다. 또한, 등과 체측 부위의 비늘이 존재하는 진피층에서는 eosin에 염색되는 염기성 물질이 상당량 분비되어 진피층의 두께가 두꺼워지는 경향을 보였다. 계절변화에 따른 이러한 피부조직의 구조적 변화를 미꾸리의 동면, 피부호흡 및 점액의 기능과 관련하여 고찰하였다.

Keywords

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