| 光裸星虫对盐度和温度的耐受性研究 |
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| 引用本文： | 代悦,王庆恒,陈桂侬,杜晓东.光裸星虫对盐度和温度的耐受性研究[J].水产科学,2009,28(10). |
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| 作者姓名： | 代悦 王庆恒 陈桂侬 杜晓东 |
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| 作者单位： | 广东海洋大学,水产学院,广东,湛江,524088 |
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| 基金项目： | 广东省自然科学基金资助项目，广东海洋大学科研项目 |
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| 摘 要： | 试验结果表明,(1)盐度从20突变为5时,其成活率为60%;盐度由20突变至50时,成活率为0.求得光裸星虫96 h半致死盐度上限为41.7.(2)盐度由25每隔12 h上升5至盐度50时,其成活率由100%降至60%,盐度逐渐由25降至5,光裸星虫成活率由100%降至85%.(3)当水温由25 ℃急骤降至20、15、10、5 ℃时,光裸星虫的成活率依次为100%、100%、100%、70%;当水温由25 ℃急骤升至30 ℃时,光裸星虫的成活率仅为10%;当突变温度急骤升至35 ℃时,其成活率为0.求得其96 h急性半致死温度上限为27.5 ℃.(4)水温由22 ℃每隔12 h逐渐升至25、30、35、40 ℃时,光裸星虫成活率下降幅度不大,分别为100%、100%、85%、85%.水温由22 ℃每隔12 h逐渐降至20、15、10、5 ℃时,其成活率均为100%.根据试验结果可知,光裸星虫属广温、广盐种.
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| 关 键 词： | 光裸星虫 盐度 温度 耐受性 |
Tolerance of Sipunculus nudus to Salinity and Temperature |
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| DAI Yue,WANG Qing-heng,CHEN Gui-nong,DU Xiao-dong.Tolerance of Sipunculus nudus to Salinity and Temperature[J].Fisheries Science,2009,28(10). |
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| Authors: | DAI Yue WANG Qing-heng CHEN Gui-nong DU Xiao-dong |
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| Institution: | DAI Yue,WANG Qing-heng,CHEN Gui-nong,DU Xiao-dong(Fisheries College,Guangdong Ocean University,Zhanjiang 524088,China) |
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| Abstract: | The tolerances of Sipunculus nudus to abrupt changes in salinity,and temperature,and successive changes in salinity and temperature were studied.The results showed that the animals had survival rate of 60% at abrupt decline salinity from 20 to 5,but survival rate of 0% at abrupt increase salinity from 20 to 50.The upper salinity limit of LC50 was 41.7 for 96 h.The survival rate declined from 100% to 60% when the salinity increased gradually from 25% to 30%,35%,40%,45%,and 50% at a rate of 5 per 12 hours.Whe... |
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| Keywords: | Sipunculus nudus salinity temperature tolerance |
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