Use left or right otolith for shape analysis in Schizothorax grahami?

IF 2.2 2区农林科学 Q2 FISHERIES

Fisheries Research Pub Date : 2025-02-13 DOI:10.1016/j.fishres.2025.107295

Zhongtang He , Mingju Luo , Weijie Cui , Yang Zhou , Tao He

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引用次数: 0

Abstract

Lots of studies using otolith microstructures to divide fish stocks only select one of the left and right otoliths as the object, and the difference between the left and right otoliths has not been considered in detail. In this paper, we used Shape Index method and R language to compare the microstructures of the left and right asteriscus otolith of Schizothorax grahami (Regan, 1904) in the source section of Chishui River. The paired t-test results of otolith morphological index showed significant difference between the roundness (P < 0.05), and the Mann-Whitney U test results showed significant difference between circularity (P < 0.05) and format-factor (P < 0.05). The results of principal component analysis showed that the eigenvalues of two principal components are greater than 1, and the cumulative contribution rate of the first two principal components was 72.84 %. In the first principal component, except for the rectangularity, the other shape indexes were greater than the second principal component, which reflected the degree of difference between the long and short axes, and the irregularity of the contour. The results of ANOVA in R language showed that there was no significant difference in Fourier coefficients of the left and right otoliths (P > 0.05). At the same time, according to the average shape reconstructed by wavelet coefficient, the contours of the left and right otoliths were symmetrical. The values of the left and right sides based on the wavelet coefficient were symmetrically distributed on both sides of the origin, while based on the Fourier coefficient were clustered in the center of the origin. Through the two analysis methods, it is indicated that there is no significant difference between the left and right aster otolith profiles of S. grahami in the source section of Chishui River. When otolith microstructures were used to classify S. grahami, the selection of a single otolith (left or right) would not affect the analysis results.

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用左耳石还是右耳石进行格拉哈姆裂胸动物的形状分析？

许多利用耳石显微结构划分鱼群的研究只选择左右耳石中的一个作为对象，并没有详细考虑左右耳石的差异。本文采用形状指数法和R语言对赤水河源区Schizothorax grahami （Regan, 1904）左右星形耳石的微观结构进行了比较。耳石形态指标配对t检验结果显示圆度之间存在显著性差异（P <； 0.05），Mann-Whitney U检验结果显示圆度之间存在显著性差异（P <； 0.05），形状因子之间存在显著性差异（P <； 0.05）。主成分分析结果表明，两个主成分的特征值均大于1，前两个主成分的累计贡献率为72.84 %。在第一主成分中，除矩形性外，其他形状指标均大于第二主成分，反映了长轴与短轴的差异程度和轮廓的不规则性。R语言方差分析结果显示，左右耳石的傅里叶系数差异无统计学意义（P >； 0.05）。同时，根据小波系数重构的平均形状，发现左右耳石的轮廓是对称的。基于小波系数的左右两侧值对称分布在原点两侧，而基于傅立叶系数的左右两侧值聚类在原点中心。通过两种分析方法，表明赤水河源区S. grahami的左右侧耳石剖面无显著差异。当使用耳石显微结构对S. grahami进行分类时，选择单个耳石（左或右）不会影响分析结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fisheries Research 农林科学-渔业

CiteScore

4.50

自引率

16.70%

发文量

294

审稿时长

15 weeks

期刊介绍： This journal provides an international forum for the publication of papers in the areas of fisheries science, fishing technology, fisheries management and relevant socio-economics. The scope covers fisheries in salt, brackish and freshwater systems, and all aspects of associated ecology, environmental aspects of fisheries, and economics. Both theoretical and practical papers are acceptable, including laboratory and field experimental studies relevant to fisheries. Papers on the conservation of exploitable living resources are welcome. Review and Viewpoint articles are also published. As the specified areas inevitably impinge on and interrelate with each other, the approach of the journal is multidisciplinary, and authors are encouraged to emphasise the relevance of their own work to that of other disciplines. The journal is intended for fisheries scientists, biological oceanographers, gear technologists, economists, managers, administrators, policy makers and legislators.