Studies on the anatomy of sulcus and outline morphometrics of the three population groups of Trichogaster lalia were carried out to examine the effects of anthropogenic stressors (dams and barrages) on the function-related morphological variability of the fish. Altogether 150 samples of the fish were procured from three geographically isolated rivers namely Ganga, Gomti and Yamuna. The features based on images and morphological indices of sulcus, otolith and body shape of the fish were analysed and compared using uni and multivariate statistical procedures. Rostrum, anti-rostrum and margins of sagittal otolith and cauda of sulcus predominantly varied among three population groups of the fish. Variations in geometric morphometrics of sulcus, otolith-outline, combination of both and body shape indicated the existence of three distinct groups of the fish where individuals of river Gomti and Ganga were found to be closer to each other compared to that of river Yamuna. Mantel test showed an overall good correlation between the morphometric data-sets based on otolith and body shape in delineating three groups of the fish. Understanding of the environmental factors influencing the variations in function-related morphology of the different groups of T. lalia is essential to identify the boundaries of the different groups of the fish and to implement the appropriate strategies for their conservation.

Trichogaster lalia的三个种群的沟解剖学和轮廓形态学研究进行了研究，以探讨人为压力源（水坝和拦河坝）对鱼类功能相关形态变异的影响。从三个地理上隔离的河流，即甘加，戈姆蒂和亚穆纳，总共采购了150种鱼。基于图像和鱼的沟，耳石和体形的形态指标的特征进行了分析，并使用单变量和多变量统计程序进行了比较。鱼的三个种群之间的讲台，抗rostrum和矢状耳石和沟马尾缘主要不同。沟的几何形态变化，耳石轮廓，身体形态的结合表明存在三个不同的鱼类群，其中发现Gomti河和Ganga河的个体比Yamuna河的个体更接近。Mantel测试显示，在描绘三组鱼类时，基于耳石的形态学数据集与身体形状之间总体上具有良好的相关性。了解影响不同人群功能相关形态变化的环境因素T. lalia对确定不同鱼类群的边界并实施适当的养护策略至关重要。