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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 1993.11
- 수록면
- 255 - 271 (17page)
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초록· 키워드
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For the development of seedling production techniques of the freshwater crab Eriocheir japonicus, the effects of salinity and temperature on the growth of larvae of the crab were studied.
Embryos hatched out as zoea larvae were measured 0.421㎜ in average carapace length. Five zoea stages needed 16~26 days for metamorphosis from zoea to megalopa at 22℃ and 24.5‰. The average carapace length of the 5th zoea was 1.16㎜ and that of the megalopa larvae was 1.89㎜. Each zoea stage could be identified based on both the number of plumosed seatae on the exopodite of maxilliped, and the number of spines on the posteroinner margin of telson and also based on the rudimentary pleopods appearence.
Zoea larvae fed rotifers and Artemia nauplii were healthy and metamorphosing rate from zoea to megalopa was 80~90% at 22~26℃ and 17.5~31.5‰. The relationship between larval period (Y in days) and water temperature (X in ℃) is expressed as Log Y= 3.8604-1.91735 Log X. Water temperature and salinity ranges for better survival and metamorphosis of the larvae were 22℃~26℃ (optimum at 26℃) and 17.5‰~31.5‰(optimum at 24.5‰), respectively. The duration of larval stages tend to longer as salinity levels deviated from optimum particulaly at lower end. All zoea larvae did not survive in freshwater.
Embryos hatched out as zoea larvae were measured 0.421㎜ in average carapace length. Five zoea stages needed 16~26 days for metamorphosis from zoea to megalopa at 22℃ and 24.5‰. The average carapace length of the 5th zoea was 1.16㎜ and that of the megalopa larvae was 1.89㎜. Each zoea stage could be identified based on both the number of plumosed seatae on the exopodite of maxilliped, and the number of spines on the posteroinner margin of telson and also based on the rudimentary pleopods appearence.
Zoea larvae fed rotifers and Artemia nauplii were healthy and metamorphosing rate from zoea to megalopa was 80~90% at 22~26℃ and 17.5~31.5‰. The relationship between larval period (Y in days) and water temperature (X in ℃) is expressed as Log Y= 3.8604-1.91735 Log X. Water temperature and salinity ranges for better survival and metamorphosis of the larvae were 22℃~26℃ (optimum at 26℃) and 17.5‰~31.5‰(optimum at 24.5‰), respectively. The duration of larval stages tend to longer as salinity levels deviated from optimum particulaly at lower end. All zoea larvae did not survive in freshwater.
목차
ABSTRACT
Ⅰ. 緖言
Ⅱ. 材料 및 方法
Ⅲ. 結果 및 考察
Ⅳ. 要約
參考文獻
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UCI(KEPA) : I410-ECN-0101-2009-529-015332042