Unravelling habitat use of <i>Coilia nasus</i> from the Rokkaku River and Chikugo River estuaries of Japan by otolith strontium and calcium

LIU Hongbo; JIANG Tao; YANG Jian

doi:10.1007/s13131-018-1190-8

基于耳石中锶和钙元素分析破解日本六角川和筑后川河口水域刀鲚的生境履历

doi: 10.1007/s13131-018-1190-8

中国水产科学研究院长江中下游渔业生态环境评价与资源养护重点实验室, 中国水产科学研究院淡水渔业研究中心, 江苏无锡 214081

基金项目: The National Natural Science Foundation of China under contract No. 31372533; China Central Governmental Research Institutional Basic Special Research Project from Public Welfare Fund under contract No. 2016PT01; the "948" Program of the Ministry of Agriculture under contract No. 2014-S6.

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- 收稿日期: 2017-09-13
- 修回日期: 2017-10-13

Unravelling habitat use of Coilia nasus from the Rokkaku River and Chikugo River estuaries of Japan by otolith strontium and calcium

Key Laboratory of Fishery Ecological Environment Assessment and Resource Conservation in Middle and Lower Reaches of the Yangtze River, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China

摘要

摘要: 为了解日本有明海沿岸六角川和筑后川河口水域鳀科鲚属鱼类刀鲚（Coilia nasus）的洄游特征和生境履历，利用电子探针微区分析（EPMA）技术，对采于两水域刀鲚的矢耳石进行了锶（Sr）元素含量的X射线强度面分布及耳石最长轴锶钙元素比值（Sr:Ca）的定量线分析。结果发现10尾六角川刀鲚（LJC）中的7尾以及15尾筑后川刀鲚（ZHC）耳石核心区域的Sr:Ca比值≤ 3，显示出这些个体在淡水生境出生并早期生活于淡水的履历。紧邻核心区域随后的生长阶段，Sr面分布图谱显示出了多样对应于含量水平差异的不同颜色同心环轮变化样式，Sr:Ca比值的波动亦可相应地分成1-6个差异极其显著的阶段，显示出这些个体在随后生活史阶段中极富变化的生境转换状况。另外3尾六角川刀鲚耳石核心的Sr:Ca比值较高（3-6.7），对应于半咸水生境；但在核心区域之外，Sr:Ca比值则高低变化不一，显示出这些六角川刀鲚个体在河口半咸水生境孵化的特征。本研究表明，二维Sr元素含量面分布图谱和基于耳石最长轴的Sr:Ca比值完全可以作为重建日本有明海沿岸各河口水域刀鲚生境履历的有效工具。
- 刀鲚 /
- 耳石微化学 /
- 生境利用 /
- 六角川 /
- 筑后川
Abstract: The migratory history of the engraulid fish Coilia nasus in the Rokkaku and Chikugo River estuaries of the Ariake Sea, Japan was assessed using otolith strontium (Sr) X-ray intensity maps and strontium:calcium (Sr:Ca) ratio life history transects by an electron probe microanalyzer (EPMA). The results showed that seven of the ten specimens from the Rokkaku River Estuary (LJC) and all 15 specimens collected in the Chikugo River Estuary (ZHC) had low Sr:Ca ratios (≤ 3) at the central otolith area, indicating their riverine origin and initial freshwater residence. After the first regime shift adjacent to natal regions, the Sr level mapping displayed a wide variety of color patterns, and the Sr:Ca ratios obtained by the line transect analysis could be divided into one to six significantly different phases indicative of gradual life history transition. The other three specimens from the Rokkaku River Estuary had high Sr:Ca ratios (3-6.7) at the central otolith area but showed alternating changes between low and high values outside the natal region, suggesting that estuarine-origin individuals occurred in the Rokkaku River Estuary. The two-dimensional maps of the Sr level and average of the otolith Sr:Ca ratios along the life-history transects could be used as effective tools for reconstruction of past habitat use of the tapertail anchovy in estuaries of the Ariake Sea, Japan.
- Coilia nasus /
- otolith microchemistry /
- habitat use /
- Rokkaku River /
- Chikugo River

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参考文献(24)

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文章访问数: 923
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基于耳石中锶和钙元素分析破解日本六角川和筑后川河口水域刀鲚的生境履历

doi: 10.1007/s13131-018-1190-8

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Unravelling habitat use of Coilia nasus from the Rokkaku River and Chikugo River estuaries of Japan by otolith strontium and calcium

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