Inter-Otolith Differences in Strontium Markings: A Case Study on the Juvenile Crucian Carp Carassius carassius (Linnaeus, 1758)
文献类型： 外文期刊
第一作者： Zhu, Yahua
作者： Zhu, Yahua;Yang, Jian;Jiang, Tao;Chen, Xiubao;Liu, Hongbo;Yang, Jian;Phelps, Quinton
作者机构：
关键词： crucian carp; otolith; strontium; marking efficiency; restocking; time delay
期刊名称：FISHES （ 影响因子：3.17； 五年影响因子：3.098 ）
ISSN：
年卷期： 2022 年 7 卷 3 期
页码：
收录情况： SCI
摘要： The release of hatchery-reared fish fry for restocking is important for the enrichment of fishery resources; however, the effective evaluation of the success rate of marking such fish is challenging. We exposed juvenile crucian carp (Carassius carassius) to a single concentration of SrCl2 center dot 6H(2)O for 5 d and evaluated the efficiency of Sr marking of the fish otoliths (sagittae, asterisci, and lapilli) using an electron probe micro-analyzer. Sr marking signatures formed a peak in all otolith types, with a marking success rate of 100%. The ratio of Sr to Ca in the lapilli and sagittae was higher than that in the asterisci. It took 2 d from the beginning of immersion to the deposition of Sr on the lapilli and sagittae, and the time delay for asterisci was 1 d. For the lapilli and sagittae, it took 16 d to terminate Sr marking and fully recover to the pre-marking Sr level, whereas it was 12 d for the asterisci. The application of the Sr dose had no effect on the survival or growth of the carp. This study demonstrated that the lapilli are the most suitable otolith type for Sr marking observations in crucian carp and provides a theoretical basis and technical support for carp restocking using the Sr marking approach.
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