Information about food web dynamics is crucial for the success of ecosystem-based management. In order to collect such information, it is necessary to establish the dietary contents of species in the food chain. In this study, the diet of Atlantic bonito Sarda sarda (Bloch, 1793), one of the most important species in the Black Sea ecosystem, has been examined. The aim of this study was to investigate the prey preferences of Atlantic bonito over an eleven-year period during their feeding migration to the Black Sea. Sampling was carried out by commercial purse seine and gill nets along the Turkish Black Sea coast during migration of the Atlantic bonito from 2005 to 2016. Stomach contents were identified to the lowest possible taxonomic level. Atlantic bonito dietary composition was analyzed by fishing season, sex and size classifications. Results revealed a Vacuity Index value (V %) of 67% while 33% of individuals sampled had at least one prey species in their stomach content. Since S. sarda predominantly feed on small fish species, stomach contents contained mainly Engraulis encrasicolus, Trachurus mediterraneus, Sprattus sprattus, Mullus barbatus, Gobius niger, Merlangius merlangus, Pomatomus saltatrix, Alosa immaculata, Parablennius tentacularis and small unidentified prey items (tissue particles, … etc.). The most frequent prey item was E. encrasicolus with a percentage occurrence of 94%. In conclusion, the main prey species was determined as E. encrasicolus and statistical analyses of X² was found significant (P < 0.005) according to year, sex and size.

有关食物网动态的信息对于基于生态系统的管理的成功至关重要。为了收集此类信息，有必要确定食物链中物种的饮食含量。在这项研究中，大西洋鱼Sarda sarda的饮食（Bloch，1793年）是黑海生态系统中最重要的物种之一。本研究的目的是调查大西洋Atlantic鱼在向黑海觅食的十一年中的猎物偏好。在2005年至2016年大西洋鱼迁徙期间，通过土耳其黑海沿岸的商业围网和刺网进行了采样。胃中的含量被确定为最低的分类标准。通过捕鱼季节，性别和大小分类来分析大西洋鱼的饮食组成。结果显示，虚度指数值（V％）为67％，而33％的被采样者的胃中至少有一种猎物。由于沙门氏菌主要以小鱼为食，因此胃中的食物主要包含鳀encrasicolus，竹荚mediterraneus，黍鲱，Mullus石竹，Gobius尼日尔， Merlangius merlangus，Pomatomus saltatrix，鲱immaculata，Parablennius tentacularis和小型猎物不明物品（组织颗粒，...等等）。最常见的猎物是大肠杆菌（E. encrasicolus），发生率为94％。总之，主要猎物种类被确定为E. encrasicolus，并且 根据年，性别和大小，对X ^2的统计分析具有重要意义（P <0.005）。