실잠자리 유충과 어류에서 분비된 카이로몬에 의한 물벼룩류의 생활사와 형태변화

The Life History and Morphological Changes of Daphnia (D. pulex and D. galeata) Induced by the Larval Damselfly (Cercion sp.) and Fish (Micropterus salmoides) Kairomones

  • 라긍환 (순천대학교 환경교육학과) ;
  • 조효녀 (순천대학교 환경교육학과) ;
  • 최현주 (순천대학교 환경교육학과) ;
  • 김현우 (순천대학교 환경교육학과)
  • La, Geung-Hwan (Department of Environmental Education, Sunchon National University) ;
  • Jo, Hyo-Nyeo (Department of Environmental Education, Sunchon National University) ;
  • Choe, Hyeon-Ju (Department of Environmental Education, Sunchon National University) ;
  • Kim, Hyun-Woo (Department of Environmental Education, Sunchon National University)
  • 발행 : 2009.03.31

초록

Daphnia pulex와 D. galeata에 대한 실잠자리류 유충의 포식 특성과 이들이 포식자로서 분비하는 화학물질에 의해 유도되는 두 종의 물벼룩의 생활사 및 형태적 방어 반응을 어류 포식자인 배스에 대해 나타내는 반응과 비교분석 하였다. 실잠자리류의 유충은 낮과 밤에 관계없이 섭식활동을 하며 상대적으로 작은 크기의 물벼룩을 주로 포식하였고, 소형의 D. galeata에 대한 포식율이 높았다. D. pulex는 실잠자리류 유충과 배스가 분비한 카이로몬에 대하여 생활사 및 형태적 변화를 나타내었다. D. galeata는 실잠자리류 유충에 상대적으로 높은 포식압에도 불구하고 배스의 카이로몬에 대한 반응만을 나타냈다. 본 실험의 결과는 다양한 포식자에 대응하는 생존전략이 물벼룩 종에 따라 다를 수 있음을 보여주었다.

We investigated the predation behavior of larval damselfly on Daphnia pulex and D. galeata, and compared the life history and morphological defenses in two Daphnia species against larval damselfly and fish kairomones. Larval damselflies showed size-dependent predation behavior and preyed upon smaller daphnids easily regardless light condition. Overall, small D. galeata juveniles were more vulnerable than D. pulex to the larval damselfly predation. D. pulex displayed life history and morphological changes as the anti-predator defenses against larval damselfly as well as large mouth bass, while D. galeata showed the anti-predator defenses to the large mouth bass. Thus, our results revealed that two Daphnia species exhibits different anti-predator defense strategy to increase survivorship.

키워드

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