한국어류학회지 (Korean Journal of Ichthyology)

  • 제20권4호
  • /
  • Pages.272-278
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  • 2008
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  • 1225-8598(pISSN)
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  • 2288-3371(eISSN)
한국어류학회 (The Ichthyological Society of Korea)
권호 표지

대구 Gadus macrocephalus 이석 표지를 위한 Alizarin Complexone의 최적 농도

Optimum Concentration of Alizarin Complexone (ALC) for Otolith Marking of Pacific Cod Gadus macrocephalus

  • 김태진 (국립 경상대학교 해양생명과학과 해양산업연구소) ;
  • 이소광 (경상남도수산자원연구소) ;
  • 곽우석 (국립 경상대학교 해양생명과학과 해양산업연구소)
  • Kim, Tae Jin (Division of Marine Bioscience, The Institute of Marine Industry, Gyeongsang National University) ;
  • Lee, So Gwang (Gyeongsangnam-do Fisheries Resources and Research Institute) ;
  • Gwak, Woo Seok (Division of Marine Bioscience, The Institute of Marine Industry, Gyeongsang National University)
  • 투고 : 2008.09.02
  • 심사 : 2008.12.06
  • 발행 : 2008.12.31
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초록

본 연구는 방류 대상종인 대구의 이석에 ALC 표지 가능 여부, 표지 적정농도 및 순간성장률을 비교 분석하여 수산 종묘 표지방류 연구에 대한 기초자료를 제공하고자 수행하였다. 전장이 작은 대구 치어($34.1{\pm}1.8mm$, $mean{\pm}SD$)의 경우 ALC 농도를 0, 20, 40, 60, 80 mg/L로, 전장이 큰 치어($73.8{\pm}1.2mm$, $mean{\pm}SD$)의 경우 ALC 농도 1, 5, 10, 20, 40 mg/L로 각각 5개 실험구를 설정하여 24시간 침적한 후 14일간 사육하면서 관찰하였다. 표지 이석을 UV light 현미경(G필터)으로 관찰한 결과 이석 표면에는 붉은색 계통의 원형띠를 형성하며 ALC가 염색 되었다. 작은 크기 치어는 모든 실험구에서 이석에 ALC가 염색 되었고, 최저 농도인 20 mg/L에서 조사한 10개체 모두 '선명함' 이상으로 판정되었으며, 각각의 실험구에 대한 실험 전후 체중과 성장률의 차이는 유의하지 않았으나 사망률은 농도가 높아지며 높아졌다. 크기가 큰 대구 치어는 10 mg/L 이상의 농도에서 1개체를 제외한 모든 개체에서 염색 정도가 '선명함' 이상으로 판정되었으며, 실험기간 동안 모든 개체가 생존하였다. 대구 방류 효과를 추적하기 위한 이석의 ALC 염색에서는 크기가 큰 치어를 대상으로 10 mg/L의 농도가 적정농도로 추정되었다.

Optimum concentration of alizarine complexone (ALC) for staining of otoliths for Pacific cod was determined by examination of stained quality, growth and survival rates. Small juveniles ($34.1{\pm}1.8mm$ TL, $mean{\pm}SD$) were immersed in four different concentrations (20, 40, 60, 80 mg/L) and large ones ($73.8{\pm}1.2mm$ TL, $mean{\pm}SD$) in five different concentrations (1, 5, 10, 20, 40 mg/L) of ALC for 24 hrs. The fish were then reared and observed for 14 days. The stained quality of otoliths was evaluated by dividing them into four grades by the presence of fluorescent stains on the otoliths under G-excited UV light. The small juveniles stained with the different ALC concentrations had 100% staining success, and their growth rate and body weight did not differ significantly between treatments. Optimal ALC concentration for the smaller juveniles was 20 mg/L in the present experiment. On the other hand, distinct fluorescent rings were confirmed on otoliths of larger juveniles in the 10 mg/L treatment with high survival rate. These results suggest that ALC staining at concentrations of 10 mg/L with larger juveniles will be helpful for release-recapture experiments for stock enhancement of Pacific cod.

키워드

과제정보

연구 과제 주관 기관 : (구)해양수산부

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