Abstract：
In the hypersaline lakes of Crimea, only 5-7 species of animals are common including Gammarus aequicauda (Amphipoda) and Eucypris mareotica (Ostracoda). Two experiments were carried out to characterize the trophic interactions between these species. In one, G. aequicauda were used freshly caught from the lake, and in the other, after they were starved for 2.5 days in the laboratory. The experimental options were one male or female G. aequicauda and either 10, 20, or 30 ostracods. The gammarids actively fed on the ostracods, and significant differences were between females and males. The feeding intensity of males was higher than that of females. However, ostracods are not passive prey, they can actively attack their predator and are capable of causing them harm. Ostracods attacked a Gammarus only if it had captured one of the ostracods. Sex differences in G. aequicauda were also evident in the reaction to the group\'s aggressive behavior of ostracods. Interactions between Ostracoda and Gammarids cannot be considered unidirectional; they both may be prey or predators depending on the situation.
摘要：
在克里米亚的高盐湖中，只有5-7种动物是常见的，包括Gammarusaequicauda（Amphipoda）和Eucyprismareotica（Ostracoda）。进行了两个实验来表征这些物种之间的营养相互作用。在一个,G.aequicauda是刚从湖中捕获的，在另一个，他们在实验室挨饿了2.5天。实验选择是一个雄性或雌性G.aequicauda和10、20或30个ostracods。gammarids积极地吃了ostracods，男女差异显著。雄性的摄食强度高于雌性。然而,类动物不是被动的猎物，它们可以主动攻击它们的捕食者，并能够对它们造成伤害。Ostracods只有在捕获了Gammarus的情况下才能攻击Gammarus。G.aequicauda的性别差异在对成虫的攻击行为的反应中也很明显。Ostracoda和Gammarids之间的相互作用不能被认为是单向的；根据情况，它们都可能是猎物或掠食者。
