Estimating trophic levels of fishes plays an important role in shedding light on the trophic interactions in aquatic ecosystems. In this short review, available literature data were collected regarding feeding habits of fishes from Hirfanli Reservoir, and the fractional trophic levels (TROPHs) were estimated. Following this, the applicability of functional trophic groups (FTG) proposed for marine fishes was tested for freshwater species. Finally, an attempt to draw a general scheme of the trophic guilds of fish species in the reservoir was made. The literature review yielded information on stomach content data of eight native species, and their TROPHs were estimated on the basis of 86 datasets, provided by nine papers. The calculated TROPH values ranged from 2.00 ± 0.00 to 4.50 ± 0.80. The number of cases from which TROPH values are estimated clustered within each of the previously defined FTGs as substantially skewed towards herbivory. The results obtained are a useful tool for applying ecosystem models and management applications for freshwater ecosystems. This work also clearly indicated the need for defining FTG for freshwater fishes that could be different from the marine ones. Such approaches are a solid basis for the maintenance of future conservation planning, especially in reservoirs.

中文翻译：

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土耳其安纳托利亚中部大型水库鱼类营养水平的审查和评估

估计鱼类的营养水平在阐明水生生态系统中的营养相互作用方面起着重要作用。在这篇简短的综述中，收集了有关 Hirfanli 水库鱼类摄食习惯的可用文献数据，并估计了部分营养水平 (TROPH)。在此之后，针对淡水物种测试了提议用于海洋鱼类的功能性营养组 (FTG) 的适用性。最后，尝试绘制水库中鱼类的营养类群的总体方案。文献综述提供了有关八种本地物种胃内容物数据的信息，并根据九篇论文提供的 86 个数据集估计了它们的 TROPH。计算的 TROPH 值范围为 2.00 ± 0.00 至 4.50 ± 0.80。估计 TROPH 值的病例数聚集在每个先前定义的 FTG 中，因为它们基本上偏向食草动物。获得的结果是应用生态系统模型和淡水生态系统管理应用的有用工具。这项工作还清楚地表明需要为可能与海洋鱼类不同的淡水鱼类定义 FTG。这些方法是维护未来保护规划的坚实基础，尤其是在水库中。