한국패류학회지 (The Korean Journal of Malacology)

한국패류학회 (The Malacological Society of Korea)
권호 표지

가온사육에 의한 새꼬막, Scapharca subcrenata의 성 성숙 및 난 발생

Effect of Heating on the Sex Maturation and Egg Development of the Ark Shell, Scapharca Subcrenata

  • 정춘구 (남서해수산연구소 해역산업과) ;
  • 오봉세 (남서해수산연구소 해역산업과) ;
  • 김태익 (남서해수산연구소 해역산업과) ;
  • 진영국 (남서해수산연구소 해역산업과)
  • Jung, Choon-Koo (Southwest Sea Fisheries Research Institute, NFRDI) ;
  • Oh, Bong-Se (Southwest Sea Fisheries Research Institute, NFRDI) ;
  • Kim, Tae-Ik (Southwest Sea Fisheries Research Institute, NFRDI) ;
  • Jin, Young-Guk (Southwest Sea Fisheries Research Institute, NFRDI)
  • 투고 : 2010.06.13
  • 심사 : 2010.07.10
  • 발행 : 2010.09.30
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초록

인위적인 가온만으로도 새꼬막의 성숙 및 정상적인 난 발생이 이루어지는지 알아보기 위해 생존율, 성비, 비만도, 생식소 발달빈도, 생식소지수, 수정률, 부화율 및 D형 유생까지의 발생소요시간을 조사하였다. 생존율은 대조구에 비해 가온구에서 낮았으며, 성비는 암컷의 비율이 높았다. 비만도는 대조구와 가온구가 유의한 차이를 보이는 가운데 수온 $17^{\circ}C$ 이상부터 증가폭이 높게 나타났다. 생식소발달빈도는 암 수 모두 대조구의 경우 발달이 느렸으며, 가온구는 수온 $20^{\circ}C$인 사육 21일부터 28일 사이에 성숙기에 도달한 개체들이 80%이상 관찰되었다. 생식소지수는 대조구에 비해 수온이 높을수록 증가하는 경향을 보였다. 새꼬막의 수정률은 $82.17{\pm}3.55%$ 였으며, 부화율은 $63.57{\pm}2.36%$로 나타났다. D형 유생의 발생소요시간은 약 15시간으로 나타났다.

The investigated of survival rate, sex ratio, condition index, gonad development frequency, gonad index, fertilization rate, hatching rate and time required development of D shape larvae of the ark shell, Scapharca subcrenata. Survival rate was lower in heating group compared with control group (P < 0.05). Sex ratio (female:male) observed 1:0.97 in control group, 1:0.62 in heating group. Condition index was significantly higher in heating group than control group (P < 0.05) and higher increased more than water temperature $17^{\circ}C$ of heating group. Gonad development observed slow in control group but more than ripe stage 80% in heating group (21-28 day, $20^{\circ}C$). Gonad index was higher in heating group compared with control group (P < 0.05). Fertilization rate and hatching rate of the ark shell was observed $82.17{\pm}3.55%$ and $63.57{\pm}2.36%$, respectively. The time required development of D shape larvae of the ark shell was observed 15 hour after fertilization. The suggested that results of the ark shell by heating were effective sex maturation and normal egg development.

키워드

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