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| 低盐胁迫对刺参存活、摄食和生长的影响 |
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胡炜1, 李成林1, 赵斌1, 邹安革2, 董晓亮1,3, 赵洪友4, 邹士方2, 尉淑辉4
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1.山东省海水养殖研究所，青岛 266002;2.蓬莱市安源水产有限公司，265600;3.中国海洋大学，青岛 266003;4.山东省莱阳市水产养殖总公司，265200
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| 摘要: |
| 采用实验生态学的方法设置包括自然海水在内的4个盐度组,分别为31（自然海水，对照组A）、26（B组）、22（C组）、18（D组）。按逐步降盐（DG）与盐度突变（DS）两种盐度变化模式对各组刺参进行盐度胁迫实验。结果表明，B组仅个别较小个体出现死亡现象，C组和D组刺参个体的DG与DS实验组的成活率均出现显著差异(P < 0.05)，DS-D组的成活率最低,仅为45.67%。不同盐度胁迫的各实验组之间，摄食率与食物转化率存在显著差异(P < 0.05)；而各实验组内，DG处理和DS处理的刺参个体的FR和FCR差异均未见显著(P>0.05)。B组内的两种降盐方式在降盐后的前10 d生长有显著差异(P < 0.05)，之后20 d内差异不显著(P>0.05)。C组和D组的刺参个体在实验中均出现体重负增长，与其余各组的SGR差异显著(P<0.05)。 |
| 关键词: 刺参 低盐胁迫 摄食率 食物转化率 生长 |
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| 基金项目:国家“863”计划（2006AA10A411）、山东省科技发展计划项目(2008GG10005004)、山东省农业良种工程重点项目(2005-2015年)、山东省农业重大应用技术创新课题(2009-2015年)、山东省农业技术推广项目(2009-2015年)、山东省农业科技成果转化项目(2010-2013年)和青岛市科技计划项目(07-1-4-13-hy、11-2-4-9-(5)-jch)共同资助 |
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| Effects of low salinity stress on survival, growth and feeding rate of sea cucumber Apostichopus japonicus |
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| Abstract: |
| Survival, growth and feeding rate of sea cucumber Apostichopus japonicus were studied in two different salinity change modes (DG: salinity Decreased Gradually; DS: salinity Decreased Sharply). In each mode, sea cucumbers were kept in seawater at 4 different salinities (31-A, 26-B, 22-C, 18-D) for 30d. The results showed that there were only a few individuals died in group B. There was significant difference between group C and D in DG and DS modes (P<0.05). The lowest survival rate was in group DS-D as 45.67%. There was significantly different FR and FCR between treatments under different low salinity stress (P<0.05). However, no significantly different FR and FCR appeared between different salinity change modes (DG and DS) during the experimental period (P>0.05). In group B, there was significant difference on growth of sea cucumber between two salinity change modes in the first 10d after the salinity decreased (P<0.05), but no significant difference in the next 20d (P>0.05). During the experiment, there were negative growth in group C and D, being significantly different from the other groups (P<0.05). |
| Key words: Apostichopus japonicus Low salinity stress FR FCR Growth |