The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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Optimal temperature conditions of Korean freshwater Cladoceran for development of standard toxicity test methods

표준생태독성시험법 개발을 위한 한국산 물벼룩의 최적사육온도 구명

  • Kim, Byung-Seok (National Institute of Agricultural Science & Technology, RDA) ;
  • Park, Yoen-Ki (National Institute of Agricultural Science & Technology, RDA) ;
  • Park, Kyung-Hun (National Institute of Agricultural Science & Technology, RDA) ;
  • Shin, Jin-Sup (National Institute of Agricultural Science & Technology, RDA) ;
  • Kim, Jin-Hwa (National Institute of Agricultural Science & Technology, RDA) ;
  • Ahn, Young-Joon (Division of Agricultural Biotechnology and the Research Center for New Bio-Materials in Agriculture, Seoul National University)
  • 김병석 (농업과학기술원 농산물안전성부) ;
  • 박연기 (농업과학기술원 농산물안전성부) ;
  • 박경훈 (농업과학기술원 농산물안전성부) ;
  • 신진섭 (농업과학기술원 농산물안전성부) ;
  • 김진화 (농업과학기술원 농산물안전성부) ;
  • 안용준 (서울대학교 농업생명과학대학 농생명공학부)
  • Published : 2005.09.30
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Abstract

Temperature is an important ambient factor affecting the physiology and metabolism of aquatic invertebrates. In this study, we studied about the survival, reproduction and growth effects of 4 different temperatures(16, 20, 24, $28^{\circ}C$) in four Korean cladoceran, Daphnia sp., Daphnia obtusa, Moina macrocopa, Simocephalus vetulus and Daphnia magna as an international standard species. All 5 water flea tested showed that molting time, fecundity and intrinsic rate of natural increase(r) in high temperature condition were higher than those in lower temperature. On the other hand, lower survivals and longer time to start of offspring were showed in high temperature. Our results suggest that the optimal temperatures of Daphnia sp.,, Moina macrocopa and Simocephalus vetulus seem to be about $20^{\circ}C$ except for Daphnia obtusa which as showed good survivals and reproductions in $16^{\circ}C$.

국내에 서식하는 주요 물벼룩에 대한 독성시험기준 마련의 필요성에 따라 국내환경에서의 대표성, 실내사육가능성 및 독성시험에 적합한 크기 등을 고려하여 선발된 4종의 한국산물벼룩(Daphnia sp., Daphnia obtusa, Moina macrocopa, Simocephalus vetulus)과 Daphnia magna를 대상으로 사육온도(16, 20, 24, $28^{\circ}C$)에 따른 번식영향을 조사하였다. 그 결과 실험에 사용한 5종 물벼룩 모두 온도가 높을수록 탈피횟수, 새끼출산수 및 내적자연증가율이 증가하고 성체가 되는데 걸리는 기간과 생존율은 낮아지는 경향을 보였다. 따라서 높은 온도조건에서 높은 내적자연증가율을 보여줌에도 불구하고 고온에서의 높은 모체사망율을 고려한다면 대부분은 $20^{\circ}C$ 내외가 가장 적절한 사육온도임을 알 수 있었다. 다만 D. obtusa의 경우에는 $16^{\circ}C$에서 더 높은 모체생존율을 보여주었으며 내적자연증가율도 $20^{\circ}C$와 비교하여 큰 차이가 없어 $16^{\circ}C$ 내외가 더 적절한 온도인 것으로 판단되었다.

Keywords

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