• Title/Summary/Keyword: 곳체

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곳체다슬기 (Semisulcospira gottschei)의 번식주기와 보육냉내 유생조성

  • 장해진;장영진;방인철;김영주
    • Proceedings of the Korean Society of Fisheries Technology Conference
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    • 2001.10a
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    • pp.289-290
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    • 2001

  • 다슬기는 강, 호수, 연못 및 계곡 등에서 서식하며, 우리나라를 비롯하여 일본, 중국 및 대만에 널리 분포되어 있다. 이중 곳체다슬기 (S. gottschei)는 복족강, 중복족목, 다슬기과, 다슬기속으로 분류되며, 자웅이체로 난태생이다. 최근 다슬기의 자원량이 해마다 줄어들고 있는 실정임에 따라, 업계에서는 다슬기 양식을 검토중이나, 이에 대한 기반지식의 부족으로 양식기술이 개발되지 못하고 있다. (중략)

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Parturition Induction on Melania Snails, Semisulcospira libertina libertina and Semisulcospira gottschei (다슬기 (Semisulcospira libertina libertina)와 곳체다슬기 (Semisulcospira gottschei)의 출산 유도)

  • Chang, Hae-Jin;Min, Byung-Hwa;Bang, In-Chul;Kim, Young-Ju;Chang, Young-Jin
    • Development and Reproduction
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    • v.9 no.1
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    • pp.7-13
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    • 2005

  • The effects of various physicochemical stimuli in parturition induction were assayed on ovoviviparous freshwater melania snails, Semisulcospira libertina libertina and S. gottschei. Both of them did not respond to $NH_4OH$ and $H_2O_2$, but showed responses to the water temperature raising, serotonin and acetylcholine. S. gottschei showed stronger responses to the stimulants in parturition induction compared with S. libertina libertina. In case of S. libertina libertina exposed to $10^{-9}M$ acetylcholine, the number of newly born larvae and juveniles per adult and juvenile parturition rate were 68 individuals and 57.5%, which were the most among experimental groups, respectively. In the parturition induction with temperature raising of $9^{\circ}C$, S. gottschei bred 113 larvae and juveniles in which juvenile parturition rate was 56.3% and $10^{-12}M$ acetylcholine also induced very high juvenile parturition rate(61.7%) and 83 larvae and juveniles. It could be concluded that the treatment of acetylcholine has a high effectiveness in the parturition induction of S. libertina libertina and S. gottschei.

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