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Mineralogy of the otoliths of naked carp Gymnocypris przewalskii (Kessler) from Lake Qinghai and its Sr/Ca potential implications for migratory pattern
Zhou, L (Zhou Ling)[1,2]; Jin, ZD (Jin ZhangDong)[1]; Li, FC (Li FuChun)[3]
2012-06-30
Source PublicationSCIENCE CHINA-EARTH SCIENCES
Volume55Issue:6Pages:983-990
Subtype期刊论文
Abstract

Otoliths are biogenic carbonate minerals whose microstructure and microchemistry have been used for age determination, stock identification, life history and environmental tracing. Using X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy, we have determined the mineral types and crystalline characteristics of three pairs of otoliths from naked carp Gymnocypris przewalskii, the predominant fish in Lake Qinghai. The results indicate that the mineral of both lapillus and sagitta of the naked carp is aragonite, and that of asteriscus is vaterite. The aragonite of lapillus has prefect crystallization. Given the shape of lapillus and the sensitivity of its aragonite to water chemistry, lapillus was used to analyze temporal Sr/Ca ratios along the maximal growth axis by an electron probe microanalyzer (EPMA). Consistent variations of Sr/Ca ratios with a range of 1.0x10(-3)-5.0x10(-3) on the long and short radii indicate that Sr/Ca ratios of lapillus potentially respond to the chemical compositions of the host waters during the period of the naked carp's growth and migration. Discontinuous (dark) zones of lapillus were formed during fall and winter when the naked carp grows slowly in Lake Qinghai, resulting in similar low Sr/Ca ratios to lake water, whereas incremental zones with higher Sr/Ca ratios respond to its migratory river waters during spring and summer. Various Sr/Ca ratios of incremental zones suggest that the migratory pattern of the naked carp may be much more flexible, rather than in a single river. Therefore, high-resolution otolith microchemistry of the naked carp can be used to trace its migratory behavior, which is of significance for determining its migratory pattern and life history of this precious species inhabiting the Tibetan Plateau.

DOI10.1007/s11430-012-4403-6
Indexed BySCI ; EI
Language英语
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Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10131
Collection加速器质谱中心
Corresponding AuthorJin, ZD (Jin ZhangDong)[1]
Affiliation1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China;
2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China;
3.College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
Recommended Citation
GB/T 7714
Zhou, L ,Jin, ZD ,Li, FC . Mineralogy of the otoliths of naked carp Gymnocypris przewalskii (Kessler) from Lake Qinghai and its Sr/Ca potential implications for migratory pattern[J]. SCIENCE CHINA-EARTH SCIENCES,2012,55(6):983-990.
APA Zhou, L ,Jin, ZD ,&Li, FC .(2012).Mineralogy of the otoliths of naked carp Gymnocypris przewalskii (Kessler) from Lake Qinghai and its Sr/Ca potential implications for migratory pattern.SCIENCE CHINA-EARTH SCIENCES,55(6),983-990.
MLA Zhou, L ,et al."Mineralogy of the otoliths of naked carp Gymnocypris przewalskii (Kessler) from Lake Qinghai and its Sr/Ca potential implications for migratory pattern".SCIENCE CHINA-EARTH SCIENCES 55.6(2012):983-990.
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