Temperature dependence of δ 18 O in otolith of juvenile Japanese sardine: Laboratory rearing experiment with micro-scale analysis
Temperature dependence of δ 18 O in otolith of juvenile Japanese sardine: Laboratory rearing experiment with micro-scale analysis
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日本沙丁鱼幼鱼耳石中 δ 18 O 的温度依赖性：微尺度分析的实验室饲养实验
DOI：
10.1016/j.fishres.2017.05.004
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发表时间：
2017
影响因子：
2.4
通讯作者：
Kawabata Atsushi
中科院分区：
文献类型：
--
作者：
Sakamoto Tatsuya;Komatsu Kosei;Yoneda Michio;Ishimura Toyoho;Higuchi Tomihiko;Shirai Kotaro;Kamimura Yasuhiro;Watanabe Chikako;Kawabata Atsushi
我们评估了使用的稳定氧同位素（δ 18 O）在耳石作为代理的温度历史的日本沙丁鱼Sardinops melanostictus个人。在一个月的时间里，日本沙丁鱼幼鱼在三种不同的水温下饲养。耳石δ 18 O（δ耳石）通过使用微型研磨机提取在饲养期间形成的部分来分析。测定了养殖水体的δ ~（18）O。耳石δ 18 O与环境水温呈线性关系：δ耳石-δwater=-0.18 *T+ 2.69（r2= 0.91，p < 0.01）。该方程与无机文石或其他沙丁鱼属提出的方程不同，结果应用于在太平洋捕获的野生日本沙丁鱼，表明它估计了更真实的现场温度。研究结果表明，在解释日本沙丁鱼耳石δ 18 O时，应使用日本沙丁鱼特有的同位素分馏方程，本文提出的方法也可用于了解其他鱼类的温度历史。
We evaluated the use of the stable oxygen isotope (δ18O) in the otolith as a proxy for the temperature history of Japanese sardineSardinops melanostictusindividuals. Japanese sardine juveniles were reared in three different water temperatures over the course of a month. Otolith δ18O (δotolith) was analyzed by extracting the portions formed during the rearing period using a micromill. δ18O of the rearing water (δwater) was also analyzed. A linear relationship between otolith δ18O and ambient water temperature was identified as follows:δotolith−δwater= −0.18 *T+ 2.69 (r2= 0.91, p < 0.01). This equation is different from that proposed for inorganic aragonite or otherSardinopsspp., with resulting application to wild Japanese sardine captured in the Pacific Ocean showing that it estimates a more realisticin situtemperature. Our findings suggest that the Japanese sardine-specific isotopic fractionation equation should be used when interpreting otolith δ18O of the Japanese sardine, and the methods presented here could also be useful to understand the temperature history of other fish species.