| 摘要: |
| 本文以仿刺参(Apostichopus japonicas Selenka)稚参为实验对象, 研究了改性黏土治理有害藻华技术对仿刺参稚参的影响。96h 急性毒性试验结果表明, 改性黏土对仿刺参稚参的半致死浓度(LC50)为6.01g/L; 安全浓度为0.601g/L, 高于在现场时的使用浓度0.1g/L; 慢性毒性试验显示改性黏土对仿刺参稚参成活率和体重增长率无明显影响; 不同浓度的改性黏土添加组中, 发现仿刺参稚参的体壁组分(水分、灰分、总糖、总脂和粗蛋白)含量变化不大, 改性黏土的加入对减少仿刺参稚参的种内竞争有一定积极作用。另外, 针对仿刺参稚参食用包括改性黏土在内的底层颗粒物的现象, 考察了不同实验组仿刺参稚参体壁中铝的含量, 分析结果显示各实验组与对照组没有显著差异。在此基础上, 考察了改性黏土有效去除有害藻华的体系中仿刺参稚参的生长情况, 发现与对照组相比, 改性黏土有效地去除了有害藻华, 还明显降低了仿刺参稚参的死亡率。因此, 改性黏土是一种有效治理仿刺参养殖水体有害藻华、对养殖生物无负面影响的藻华治理技术。 |
| 关键词: 改性黏土 有害藻华 仿刺参(Apostichopus japonicas Selenka) 东海原甲藻 |
| DOI：10.11693/hyhz20130124004 |
| 分类号: |
| 基金项目:国家自然科学基金, 41276115 号; 国家重点基础研究发展计划(973计划), 2010CB428706号; 国家基金“创新研究群体”项目, 41121064 号。 |
|
| IMPACT OF MODIFIED CLAY ON THE GROWTH OF THE INFANT APOSTICHOPUS JAPONICASSELENKA IN HABS CONTROLING |
|
Wang Zhi-fu,Yu Zhiming,Song Xiuxian,Cao Xihua and Liu Kai
|
|
Institute of Oceanology, Chinese Academy of Sciences,Institute of Oceanology, Chinese Academy of Sciences,Institute of Oceanology, Chinese Academy of Sciences,Institute of Oceanology, Chinese Academy of Sciences,Ocean University of China
|
| Abstract: |
| This study aimed at investigating the impact of modified clay (MC) that used to control harmful algae bloom on juvenile Apostichopus japonicas Selenka. MC was formulated in different concentrations, in which animals were tested. The result show that the half lethal concentration (LC50) was 6.01g/L in 96h acute test. In chronic toxicity test, the growth and survival were almost the same as the control. The moisture, ash, sugar, fatty acid, and protein contents of the animal tissues showed no significant changes under the concentration below 1.0g/L. After 60-day incubation experiment under concentration of 1.0g/L, no significant change was observed in aluminum content in the tissues. In addition, we studied the removal of harmful algal Prorocentrum donghaiensewith MC, and the effective MC concentration was 0.1 and 0.5 g/L, at which the mortality of juvenile A. japonicas could be reduced simultaneously. Thus, we did not find any negative impact of MC flocculation on benthic A. japonicas, and the MC treatment was proved an effective and reliable treatment to mitigate harmful algae bloom. |
| Key words: modified clay harmful algae bloom Apostichopus japonicasSelenka Prorocentrum donghaiense |
