The present study investigated the trophic ecology of two species living in an alluvial lake ecosystem in terms of season, length groups, sex, and mouth morphology. The fish were caught in a coastal lake area between December 2014 and March 2016 using a seine. In general, C. aquaedulcis was the most important prey for S. abaster , accounting for 10.99% of all prey, while amphipods accounted for 54.04% of the S. acus diet. Amphipods were the most frequently consumed prey in autumn, while C. aquaedulcis was the most important prey in spring. This result indicates that the species preferred similar prey groups and generated food competition depending on the season. The short-length group contained samples of S. abaster with empty guts, whereas S. acus in the same group consumed C. aquaedulcis . Length group II and III of individuals indicated that both species consumed amphipods and juvenile Syngnathus sp. Thus, the two species had statistically different preferences in terms of prey length. The mouth width of S. abaster was larger than that of S. acus . In conclusion, zooplankton constituted the main prey for both species in the lake and the morphological differences between the mouth apparatus of the species were due to the differences in feeding habits.

中文翻译：

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监测冲积湖栖息地（土耳其巴法湖）的pipe鱼物种（Syngnathus abaster，Syngnathus acus）的营养生态

本研究从季节，长度，性别和嘴形等方面研究了生活在冲积湖生态系统中的两个物种的营养生态。在2014年12月至2016年3月之间，这些鱼类是通过围网捕捞到沿海湖泊中的。总的来说，水产梭状芽胞杆菌是苦瓜链球菌的最重要猎物，占所有猎物的10.99％，而两栖类动物占链球菌饮食的54.04％。在秋天，两栖类动物是最常被捕食的猎物，而在春季，C。aquaedulcis是最重要的猎物。这一结果表明，该物种更喜欢类似的猎物群体，并根据季节产生了食物竞争。短长度的组包含带有空胆的苦参链球菌样品，而同一组中的曲霉则消耗了水假单胞菌。长度第二和第三组的个体表明，这两个物种都消耗了两栖类和幼体Syngnathus sp。因此，根据猎物长度，这两个物种在统计学上有不同的偏好。苦链霉的口宽度大于苦链霉的口宽度。总之，浮游动物是湖中两个物种的主要猎物，并且该物种的口器之间的形态差异是由于摄食习惯的差异所致。