Comparative Analysis of Otolith Micro-Characteristic in Schizothorax grahami and Spinibarbus sinensis
Comparative Analysis of Otolith Micro-Characteristic in Schizothorax grahami and Spinibarbus sinensis
Qun Lu1,4, Yang Zhou1, Hangyu Lin1,4, Zhong tang He1, Feifan Ma1, Yonghua Zheng1,2, Hongyu Tang1,2 and Tao He1,2,3*
ABSTRACT
In this paper, the micro-features of sagittal otoliths of Schizothorax grahami and Spinibarbus sinensis were analyzed in the upper reaches of the Yangtze River. The results of age identification showed that Sc. grahami and Sp. sinensis did not reach the age of sexual maturity. The linear discriminant analysis of otolith shape-index analysis can effectively distinguish the otolith shape of the two kinds of fish. The highest content of five chemical elements in otolith is Ca, and the other four elements are Mg, Sr, Ba, and Mn in turn. The results of one-way ANOVA show that, the molar ratio of each element to calcium (Mg/Ca, Ba/Ca, Sr/Ca and Mn/Ca) showed that there was significant difference between Se. grahami and Sp. sinensis, which could be used to distinguish two species of fish belonging to different genera of the same family. This research could also provide data reference for the study of the migration route between Sc. grahami and Sp. sinensis.
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