Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
권호 표지

Diel Pattern of Littoral Swarming in Moina macrocopa and Impact of Juvenile Fish Density

  • Jeong, Hyun-Gi (Nakdong River Environmental Research Center, National Institute of Environmental Research) ;
  • La, Geung-Hwan (Department of Environmental Education, Sunchon National University) ;
  • Kim, Hyun-Woo (Department of Environmental Education, Sunchon National University) ;
  • Jang, Min-Ho (Department of Biology Education, Kongju National University) ;
  • Jeong, Kwang-Seuk (Department of Biological Sciences, Pusan National University) ;
  • Yoon, Ju-Duk (Department of Biological Sciences, Pusan National University) ;
  • Joo, Gea-Jae (Department of Biological Sciences, Pusan National University)
  • Received : 2010.11.15
  • Accepted : 2010.12.14
  • Published : 2010.12.31
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Abstract

The diel swarming of Moina macrocopa and the relationship between environmental factors were evaluated in a shallow reservoir. The littoral density of Moina macrocopa maintained low from night to noon, reached maximum density at the afternoon with compact swarms at the waters' edge, and dispersed after sunset. The recruitment of Moina macrocopa and changes of water temperature (r=0.709, p<0.001) and juvenile fish density (r=0.511, p=0.002) in the littoral zone showed a significant positive relationships. After the induction of diel horizontal migration toward littoral zone, therefore, direct juvenile fish predation pressure should be induced Moina macrocopa swarming.

Keywords

References

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