Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Behavioral Response of Tubifex tubifex to Changes of Water Temperature and Substrate Composition

수온 및 하상 변화에 대한 참실지렁이 (Tubifex tubifex)의 행동 반응

  • Kang, Hyejin (Department of Biology, Kyung Hee University) ;
  • Bae, Mi-Jung (Freshwater Biodiversity Research Division, Nakdonggang National Institute of Biological Resources) ;
  • Park, Young-Seuk (Department of Biology, Kyung Hee University)
  • 강혜진 (경희대학교 생물학과) ;
  • 배미정 (국립낙동강생물자원관 담수생물다양성연구실) ;
  • 박영석 (경희대학교 생물학과)
  • Received : 2017.08.31
  • Accepted : 2017.09.23
  • Published : 2017.09.30
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Abstract

In this study, we investigated the response of freshwater oligochaete, Tubifex tubifex, to the water temperature changes and the differences of substrate composition in a laboratory condition. The changes of body shape were observed in a test cage according to the water temperature change ranging from $10^{\circ}C$ to $30^{\circ}C$ with $2^{\circ}C$ interval every 10 minutes. The substrate preference was observed with four different substrate composition from silt-clay to coarse sand. Our results displayed that T. tubifex preferred substrates with the smallest particle size (<0.063 mm). The water temperature influenced on the activity and body shape of T. tubifex, showing low activity with the coiled and constricted body shapes at lower temperature and high activity with relaxed linear body shapes at higher temperature.

담수에 서식하는 참실지렁이(Tubifex tubifex)가 수온 변화에 따라 보이는 반응과 하상의 구성에 대한 선호성을 분석하였다. 수온이 증가할 때 참실지렁이는 활동성이 증가하였다. $10{\sim}16^{\circ}C$의 낮은 온도에서 50% 이상의 개체가 몸을 수축하고 꼬여있는 상태로 관찰되었으며, $24^{\circ}C$ 이상의 온도에서는 대부분의 개체가 몸을 꼬임 없이 이완시킨 상태로 관찰되었다. 하상입자의 크기가 다른 여러 하상을 이용한 실험에서는 가장 작은 입자인 미사-진흙 (silt-clay, <0.063 mm)을 선호하였다.

Keywords

References

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