<b>Feeding Ecology of the Critically Endangered </b><b><i>Gobio insuyanus </i></b><b>(Gobionidae)</b>

Despite the critical conservation status of the endemic gudgeon <i>Gobio insuyanus</i>, its feeding ecology remained unstudied. This research addresses this gap by investigating the diet of <i>G. insuyanus</i> in the Insuyu spring-stream system of Central Anatolia (Turkey) analyzing spatial, temporal, and intraspecific variations. We compared two distinct habitats: a stable spring and its continuum, a fluctuating stream. Results indicate that <i>G. insuyanus</i> is an omnivore, consuming primarily detritus, Gammarids, and Diptera larvae. Feeding activity was higher in the spring habitat, particularly in summer, possibly related to its stable temperature and lower turbidity. Dietary diversity was higher in the stream, potentially reflecting its greater habitat complexity, but decreased in both habitats in autumn, suggesting a seasonal decline in prey availability. A significant ontogenetic shift in diet was observed; mature individuals exhibited a narrower niche and preferred larger prey, probably due to increased gape size, improved foraging ability and higher energy requirements. No significant dietary differences were found between the sexes. The results have conservation implications, emphasizing the need to maintain the integrity of both habitats. Future research incorporating fish movement data with feeding ecology will further improve our understanding and inform more targeted conservation strategies.

尽管特有物种因苏鮈（Gobio insuyanus）处于极危保护状态，但其摄食生态学研究至今仍为空白。本研究针对这一研究缺口，以土耳其安纳托利亚中部因苏泉溪系统中的因苏鮈为研究对象，系统探究其食性组成，并分析空间、时间及种内食性差异。我们对比了两类典型生境：一处稳定的泉水及其相连的波动溪流。研究结果显示，因苏鮈为杂食性鱼类，主要摄食碎屑、钩虾类（Gammarids）和双翅目幼虫。其摄食活动在泉水生境中更为活跃，尤以夏季为甚，这可能与泉水恒定的水温及较低的浊度相关。溪流生境中的食性多样性更高，这或许反映了其生境复杂度更高，但两类生境的食性多样性均在秋季出现下降，表明猎物可获得性随季节呈现衰减趋势。研究还观测到显著的个体发育食性转变：成熟个体的生态位更窄，且偏好体型更大的猎物，这可能与其更大的口裂尺寸、更强的觅食能力以及更高的能量需求密切相关。雌雄个体间未发现显著的食性差异。本研究结果具有重要的保护指导意义，强调了维持两类生境完整性的必要性。未来若结合鱼类移动数据与摄食生态学开展研究，将进一步深化我们对该物种的认知，并为制定更具针对性的保护策略提供科学依据。

搜集汇总

背景与挑战

背景概述

该数据集研究了土耳其安纳托利亚中部濒危特有鳅鱼Gobio insuyanus的摄食生态学，填补了其摄食生态的知识空白。研究通过比较稳定泉水和波动溪流两种栖息地，分析了空间、时间和种内变异，发现该物种为杂食动物，主要摄食碎屑、钩虾和双翅目幼虫，并揭示了摄食活动受栖息地稳定性、季节性和个体发育影响的特点，对保护栖息地完整性具有重要启示。