Direct relationship between water and otolith chemistry in juvenile estuarine triplefin Forsterygion nigripenne
Direct relationship between water and otolith chemistry in juvenile estuarine triplefin Forsterygion nigripenne
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DOI：
10.1016/j.fishres.2018.11.002
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发表时间：
2019-03
影响因子：
2.4
通讯作者：
Fasil Taddese;M. Reid;G. Closs
中科院分区：
文献类型：
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作者：
Fasil Taddese;M. Reid;G. Closs
河口内的物理化学变量的时间波动提出了挑战，在使用耳石化学作为替代鱼类栖息地的使用。因此，在使用该技术之前，在受控环境中验证环境水和耳石化学组成之间的关系对于重建鱼类的生活史具有重要价值。在本实验中，我们饲养的河口三鳍金枪鱼在三个锶和钡浓度和两个盐度水平的一段时间为六个星期的少年。利用激光烧蚀电感耦合等离子体质谱法（LA-ICP-MS）分析耳石表明，Sr：Ca和Ba：Ca在耳石中的直接和线性相关，其各自的浓度在饲养水。然而，增强吸收的Ba与增加Sr浓度也观察到。总体而言，盐度对耳石Sr：Ca和Ba：Ca的影响被认为是有限的。我们的研究结果证实，耳石微量元素分析是一个可靠的技术，破译迁移模式的鱼类之间的沃茨与不同的Sr：Ca和Ba：Ca组成。
Temporal fluctuations of physicochemical variables within estuaries present challenges in the use of otolith chemistry as a proxy to fish habitat use. Therefore, validating the relationship between ambient water and otolith chemical composition in a controlled environment before employing the technique is of great value in reconstructing life history of a fish species. In the present experiment we reared juveniles of estuarine triplefin at three Sr and Ba concentrations and two salinity levels for a period of six weeks. Analyses of otoliths using Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) indicated that Sr:Ca and Ba:Ca in otoliths were directly and linearly related to their respective concentration in the rearing water. However, enhanced uptake of Ba with increasing Sr concentration was also observed. Overall, the effect of salinity on otolith Sr:Ca and Ba:Ca was found to be limited. Our results confirmed that otolith trace element analysis is a reliable technique to decipher migration pattern of fish that move between waters with different Sr:Ca and Ba:Ca compositions.