PDF(Pubmed)
Abstract：
Procambarus clarkii is adept at using natural shelters and caves to evade attacks from predators. However, the concealment abilities and mechanisms of P. clarkii for different types of shelters under predation pressure have not yet been reported. In this study, laboratory experiments were carried out to determine the effects of different coverages (25%, 50%, and 75%) and different combinations (I-VII) of three types of shelters (PVC pipes, water grass, and stone) on the predation rhythm, behavior, and abilities of Silurus asotus on P. clarkii. The results indicated that the predation of S. asotus on P. clarkii exhibited significant rhythmicity under shelter conditions, excluding PVC pipes, 75% stone, and combination VI. Among the three types of shelters, PVC pipes provided the strongest concealment, followed by stone and water grass. With the increase in shelter coverage, the anti-predation ability of P. clarkii continued to increase, and the optimal shade rate for water grass was 50%. In the different shelter combinations, the environmental complexity had little effect on the predation activity of S. asotus on P. clarkii. These findings demonstrated that the type and abundance of shelters in the wild environment can affect the predation rhythm and activities of S. asotus on P. clarkii.
摘要：
Procambarusclarkii擅长使用天然庇护所和洞穴来逃避掠食者的攻击。然而,目前尚无关于捕食压力下Clarkii对不同类型庇护所的隐藏能力和机制的报道。在这项研究中,进行了实验室实验，以确定不同覆盖率的影响(25%，50%,和75％）以及三种类型的遮蔽物（PVC管，水草,和石头)在捕食节奏上，行为，和asotusasotus对P.clarkii的能力。结果表明，在庇护条件下，谷类芽孢杆菌对克氏疟原虫的捕食表现出显著的节律性，不包括PVC管，75%的石头，组合VI。在三种类型的避难所中，PVC管提供了最强的隐蔽性，其次是石头和水草。随着避难所覆盖率的增加，克氏疟原虫的抗捕食能力持续增强,水草的最佳遮荫率为50%。在不同的避难所组合中，环境复杂性对沙棘对克氏疟原虫的捕食活动影响不大。这些发现表明，野生环境中庇护所的类型和丰富程度会影响鱼尾丝虫的捕食节奏和活动。
