Otolith shape reveals the population structure of 'Malabar Labeo’, Labeo dussumieri (Valenciennes, 1842), in the four west-flowing rivers of India

IF 2.2 2区农林科学 Q2 FISHERIES

Fisheries Research Pub Date : 2024-06-18 DOI:10.1016/j.fishres.2024.107084

Ashna Shanmughan , Suman Nama , Ashok Kumar Jaiswar , Karankumar Ramteke , Binaya Bhusan Nayak , Annam Pavan-Kumar , Shashi Bhushan

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Abstract

Otolith shape variation in Labeo dussumieri from the four west-flowing rivers of India was analyzed using Wavelet coefficients and elliptic Fourier descriptors in the ShapeR package. The mean otolith shape of L. dussumieri varied significantly among sampling locations, with the posterior margin of the otolith showing the maximum variation. Otolith shape analysis also revealed variations between regions of different latitudes, with the northern (Narmada and Kundalika River) and southern populations (Achankovil and Chalakudy River) forming two distinct clusters. This variability in otolith shape might be attributed to the variation in environmental conditions prevailing in the sampling locations. The linear discriminant analysis based on elliptic Fourier descriptors and Wavelet coefficients showed an overall classification success of 89.03 % and 89.20 %, respectively. The present study validated that the lapillar otoliths are ideal for investigating the population structure of cyprinid fishes like L. dussumieri. The present study provided the first comprehensive information on the otolith shape analysis of L. dussumieri from the four west-flowing rivers of India.

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耳石形状揭示了印度四条西流河中 "马拉巴尔拉贝鱼"（Labeo dussumieri，Valenciennes，1842 年）的种群结构

利用 ShapeR 软件包中的小波系数和椭圆傅里叶描述符分析了印度四条西流河中杜氏鲮的耳石形状变化。Dussumieri 的平均耳石形状在不同采样地点之间存在显著差异，耳石后缘的变化最大。耳石形状分析还显示了不同纬度地区之间的差异，北部种群（纳尔马达河和昆达利卡河）和南部种群（Achankovil 河和 Chalakudy 河）形成了两个不同的集群。耳石形状的这种变化可能是由于取样地点的环境条件不同造成的。基于椭圆傅里叶描述符和小波系数的线性判别分析显示，总体分类成功率分别为 89.03 % 和 89.20 %。本研究验证了耳石是研究鲤科鱼类（如杜苏眉鱼）种群结构的理想工具。本研究首次提供了有关印度四条西流河中鲤科鱼类耳石形状分析的全面信息。

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.