한국양식학회지 (Journal of Aquaculture)

한국양식학회 (The Korean Society of Fisheries and Aquatic Science)
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해산 요각류 Tigriopus japonicus 개체군 성장에 미치는 착편모조의 영향

Evalution of Three Species of Haptophyte Algae for the Culture of the Marine Copepod Tigriopus japonicus

  • 김형신 (제주대학교 기초과학연구소) ;
  • 정민민 (국립수산과학원 제주수산연구소)
  • Kim, Hyeung-Sin (Research Institute for Basic Science, Jeju National University) ;
  • Jung, Min-Min (Jeju Fisheries Research Institute, National Fisheries Research and Development Institute)
  • 발행 : 2005.05.25
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초록

I. galbana, P. parvum 및 P. patelliferum 등 3종의 착편모조를 각각 먹이로서 급이 하면서 각각의 먹이에 따른 해산 요각류 T. japonicus의 nauplius 및 copepodid 유생의 개체수 증식 양상과 재포란 암컷의 개체수 변화 양상, 그리고 배양 도중 사망한 성체 암컷의 개체수를 서로 비교하였으며, 또한 각 계수일에 측정한 배 양수내의 먹이로서 급이한 3종의 착편모조의 세포수 변화 양상을 관찰하였다. 비교구로서 먹이를 전혀 공급하지 않은 실험구의 T. japonicus는 고압 멸균한 자연 해수만을 이용하여 배양하였다. 실험 결과 3종의 착편모조 중 I. galbana를 급이한 경우에는 T. japonicus의 정상적인 유생 발생과 함께 적극적인 I. galbana의 섭이를 관찰할 수 있었으나, P. parvum과 P. patelliferum을 급이한 경우에는 갓 부화한 nauplius 유생이 거의 100% 사망하였고 암컷 성체의 재포란율 또한 거의 0 (zero)임이 관찰되었다. 더욱이 15일간의 실험기간 중에 암컷 성체의 사망을 관찰하였다. 위와 같은 일련의 실험 결과로 볼 때, 독성을 가지며 적조의 원인종으로 알려진 착편모조 P. parvum과 P. patelliferum은 요각류 T. japonicus에 대해서 유해함을 알 수 있었다.

Three haptophyte algae, Isochrysis galbana, Prymnesium parvum and P. patelliferum were offered to the marine copepod Tigriopus japonicus as food. Growth rate of larvae, egg production, mortality and comsumption rates of T. japonicus were measured for each of the haptophyte species offered. The growth rate of larvae, egg production and algal ingestion of T. japonicus fed on P. parvum and P. patelliferum were much lower than those fed on I. galbana and corresponding high mortality rates were also observed during the experimental period. The harmful effects observed during the present study indicate that bloom-forming haptophyte algae, P. parvum and P. patelliferum are not suitable feed species for culture of copepod, T. japonicus.

키워드

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