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| 三疣梭子蟹“黄选1号”盐度耐受性分析 |
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隋延鸣1,2, 高保全1, 刘萍1, 任宪云1,2, 李洋1,3, 丁金强1,2, 段亚飞1,2
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1.农业部海洋渔业可持续发展重点实验室，中国水产科学研究院黄海水产研究所，青岛266071;2.上海海洋大学水产与生命学院，201306;3.大连海洋大学，116023
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| 摘要: |
| 通过盐度突变和渐变两种方法测定了三疣梭子蟹“黄选1号”的盐度耐受性。盐度突变条件下，Ⅱ期幼蟹24、48、72h低盐半致死浓度分别为21.655、22.109、23.184；高盐半致死浓度分别为50.711、50.061、49.612。80日龄成蟹24、48、72h低盐半致死浓度分别为5.13、7.49、8.56；高盐半致死浓度分别为54. 49、52.74、52.21。在逐渐降低盐度条件下，Ⅱ期幼蟹可在盐度6.7的海水中存活，而80日龄成蟹可在盐度为5.7的海水中存活；随着盐度逐渐升高，Ⅱ期幼蟹和80日零成蟹均可在盐度47.7的海水中存活。三疣梭子蟹“黄选1号”具有较宽的盐度耐受范围。 |
| 关键词: 黄选1号 三疣梭子蟹 盐度 耐受性 LD50 |
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| 基金项目:国家高技术研究发展计划项目（2012AA10A409）、农业科技成果转化资金项目（2010GB23260589）和山东省科技发展计划项目（2011GHY11526）共同资助 |
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| Preliminary studies on the salinity tolerance of “Huangxuan No.1” Portunus trituberculatus |
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| Abstract: |
| The salinity tolerance of “Huangxuan No.1” Portunus trituberculatus was investigated in controlled temporary water by including sudden and gradual changes in salinity. The results showed that the LD50 values of crab larvae at Stage Ⅱ for 24h,48h,72h tolerance to low-salinity were 21.655, 22.109, 23.184，respectively, and for tolerance to high-salinity were 50.711, 50.061, 49.612 respectively. The LD50 values of 80-day crabs for 24, 48, 72h tolerance to low-salinity were 5.13, 7.49, 8.56，respectively, and for tolerance to high-salinity were 54.49, 52.74, 52.21 respectively. Crab larvae at Stage Ⅱ can survive in 6.7 low-salinity water by gradual salinity decrease,and can survive in 47.7 high-salinity water by gradual salinity increase.While 80-day crabs can survive in 5.7 low-salinity water by gradual salinity decrease,and can survive in 47.7 high-salinity water by gradual salinity increase. Therefore,“Huangxuan No.1” P. trituberculatus has a strong salinity tolerability. |
| Key words: Huangxuan No.1 Portunus trituberculatus Salinity tolerance LD50 |