The Field Observations on the Littoral Swarming of Cladocera (Scapholeberis kingi Sars 1903) and the Correlation with Environmental Factors

  • La, Geung-Hwan (Department of Biology, Pusan National University) ;
  • Jeong, Hyun-Gi (Department of Biology, Pusan National University) ;
  • Kim, Myoung-Chul (Department of Biology, Pusan National University) ;
  • Kim, Hyun-Woo (Department of Environmental Education, Sunchon National University) ;
  • Joo, Gea-Jae (Department of Biology, Pusan National University)
  • Published : 2007.12.31

Abstract

Swarm formation of Scapholeberis kingi Sars 1903 was observed in a shallow reservoir on 27 May 2007 (Dongpan Reservoir) for the first time. Dense swarms composed of asexual females, only occurred during daytime (13:00-17:00, local time) at the littoral zone. Correlation between density of S. kingi and environmental factors such as water temperature and density of juvenile fish were positively significant. Therefore, it is suggested that the swarming of S. kingi seems to be induced for predator avoidance than increase of mating chance, and water temperature may affect their swarming behavior.

Keywords

References

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