J. Lake Sci.湖泊科学), 201729): 914⁃922 DOI 10 18307 / 2017 0415 ©2017 by Journal of Lake Sciences 耳石锶标记在识别鳙Aristichthys nobilis放流个体的可行性 李秀启 丛旭日 师吉华 高云芳 (1:山东省淡渔业研究院山东省淡产遗传育种重点实验室济南 250013) (2:中国产科学研究院淡渔业研究中心中国产科学研究院内陆渔业生态环境与资源重点开放实验室无锡 214081) 为探讨耳石微化学分析的相关方法和技术在鳙Aristichthys nobilis放流群体识别中的应用以鳙的 龄幼鱼为 研究对象设置 1、2、4、8、16 mg / L 5 个浓度梯度的 SrCl 溶液标记利用元素电子显微探针技术(EPMA) 检测获得了良好 的标记图谱面分布分析结果显示暂养 28 d 后外源 Sr 在耳石的边缘形成明显的标记环与对照组的蓝色边缘相 锶环带从黄绿色过渡到橘红色随着标记浓度增大有加深的趋势定量线分析表明对照组的 Sr / Ca 值处于稳定的 2.14± 0.39,而不同浓度 Sr 的实验组 Sr / Ca 值均出现一个较为明显的峰值范围(5.04~32.32),且外源 Sr 浓度与耳石边缘的 Sr / Ca 值之间存在明显的线性关系标记过程中对照组和标记浓度间的死亡率并有显著差异结果表明锶标记原理 和方法在鳙的大规模放流群体标记是可靠和安全的验证了耳石锶标记在识别鳙放流个体上的可行性建议选择鳙放流 前仔稚鱼和幼鱼4 mg / L 设为外源 Sr 的最适标记浓度标记持续时间为 28 d 以上为宜 关键词耳石锶标记电子探针群体标记技术 Feasibility analysis of releasing individuals of Aristichthys nobilis identification based on o⁃ tolith Sr markers LI Xiuqi CONG Xuri SHI Jihua GAO Yunfang JIANG Tao & YANG Jian (1: Shandong Freshwater Fisheries Research InstituteShandong Provincial Key Laboratory of Freshwater Aquaculture Genetic BreedingJinan 250013, P.R.China (2: Key Laboratory of Ecological Environment and Resources of Inland FisheriesFreshwater Fisheries Research CenterChi⁃ nese Academy of Fishery SciencesWuxi 214081, P.R.China Abstract: To explore the method of microchemistry marking on the otolith of Aristichthys nobilis, the 1⁃year⁃old juveniles were reared at five different concentrations(1, 2, 4, 8, 16 mg / L) for 28 days, and the exogenous Sr sedimentation in otoliths were de⁃ tected with electron probe microanalyzer (EPMA). The mapping analysis showed that obvious strontium signatures in the edge of o⁃ toliths of juveniles were produced at different concentrations of Sr. The yellow⁃green strontium bandappeared in low level, the deep red zone shown as the concentration gradually increased. Line analysis indicated that the Sr / Ca ratio of control group was stable at 2.14±0.39, but which in the experimental groups of the different concentrations all appeared quite dramatically peak strontium val⁃ ue(5.04-32.32) . Significant linear relationship was found between exogenous Sr and the Sr / Ca ratio in the edge of otoliths. There was also no significant difference in death rate between control and experimental groups. All of these suggested that the method of Sr marking confirmed the feasibility in recognizing the releasing individuals of A. nobilis. We suggest that stock discrimination of A. no⁃ bilis were marked in larval and juvenile and the concentration of exogenous Sr should be 4 mg / L, lasting for more than 28 days. KeywordsAristichthys nobilis; otolith; strontium marking; electron probe microanalyzer; stock mark 2008 年我国开始设立专项资金实施增殖放流工作以来每年数以亿万的苗种被放流自然域重大 意义在于补充渔业资源和修复域生态系统当前放流工作迫切需要决的是如何客观评价增殖放流效 公益性行业农业科研专项经费(201303050) 和山东省 2016 年度农业重大应用技术创新课题联合资助. 2016 06 07 收稿;2016 09 27 收修改稿李秀启(1968~),博士副研究员; E⁃mail:xiuqili@ sina.cn.