The Korean Journal of Malacology (한국패류학회지)

The Malacological Society of Korea (한국패류학회)
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Effects of Water Temperatures on the Larval Development and Spat Growth of the Cockle Shell, Fulvia mutica

새조개 (Fulvia mutica) 난 발생 및 유생 성장에 미치는 수온의 영향

  • Kim, Jae-Min (Department of Aquaculture, Chonnam National University) ;
  • Kim, Sang-Chel (Department of Aquaculture, Chonnam National University) ;
  • Hur, Jun-Wook (Department of Aquaculture, Chonnam National University) ;
  • Lim, Sang-Min (Department of Aquaculture, Chonnam National University) ;
  • Kim, Young-Hun (Iniand Fisheries Research Laboratory, Jeollanamdo Ocean and Fisheries Science Institute) ;
  • Seon, Seung-Cheon (Abalone Research Center, Jeollanamdo Ocean and Fisheries Science Institute) ;
  • Kang, Kyoung-Ho (Department of Aquaculture, Chonnam National University)
  • 김재민 (전남대학교 수산해양대학 해양기술학부) ;
  • 김상철 (전남대학교 수산해양대학 해양기술학부) ;
  • 허준욱 (전남대학교 수산해양대학 해양기술학부) ;
  • 임상민 (전남대학교 수산해양대학 해양기술학부) ;
  • 김영훈 (전라남도 해양수산과학원 내수면시험장) ;
  • 선승천 (전라남도 해양수산과학원 전복연구센터) ;
  • 강경호 (전남대학교 수산해양대학 해양기술학부)
  • Received : 2012.02.08
  • Accepted : 2012.03.06
  • Published : 2012.03.31
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Abstract

The effect of water temperature on spawning induction, larval development, spat settling and its growth of the cockle shell, Fulvia mutica, were investigated to obtain the basic data for effective seed production. The eggs, which were randomly divided into 6 groups of water temperatures of 14, 17, 20, 23, 26 and $29^{\circ}C$, were transferred into 1 L beaker, respectively. The relationships between the water temperature and the required time (1/h, hour) by each egg developmental stage were calculated. Biological minimum water temperature and the cumulative water temperature until egg development of the veliger stage were calculated to be $0.1^{\circ}C$ and $397.3^{\circ}C$, respectively. The optimal water temperature for developmental bioassay of F. mutica was clarified to be $23^{\circ}C$. The required time for the embryo to become veliger larvae was 20 hours at $23^{\circ}C$.

새조개의 효율적인 종묘생산을 위한 생물학적 기초자료를 얻고자 난발생 및 유생사육에 미치는 환경요인으로서 수온의 영향에 대하여 연구하였다. 실험에 사용된 수정란은 산란유도하여 6개의 수온별 실험구 (14, 17, 20, 23, 26 및 $29^{\circ}C$)에 수용하여 발생과정을 관찰하였다. 유생사육의 각 단계에 이르기까지의 수온 (T, $^{\circ}C$) 에 따른 발생속도 (1/h, 시간) 는 수온이 높을수록 빨랐으며 그 관계식은 다음과 같다. 4-cell : 1/h = 0.0067T-0.0879 ($r^2$ = 0.8760) 8-cell : 1/h = 0.0128T-0.1794 ($r^2$ = 0.7589) M (상실기) : 1/h = 0.0234T-0.3274 ($r^2$ = 0.9587) B (포배기) : 1/h = 0.0306T-0.4276 ($r^2$ = 0.9236) T (담륜자기) : 1/h = 0.0442T-0.6224 ($r^2$ = 0.9121) V (D형유생) : 1/h = 0.0864T-1.2850 ($r^2$ = 0.8586) 유생사육시 수온과 난발생 속도와의 관계에서 추정된 D형 유생까지 난발생의 생물학적 영도 및 적산수온은 평균 $0.1^{\circ}C$ 및 $597.3^{\circ}C$였다. D형유생까지 가장 적합한 수온은 $23^{\circ}C$였으며, 발생은 20시간으로 나타났다.

Keywords

References

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