The Influence of Shelter Type and Coverage on Crayfish ( Procambarus clarkii ) Predation by Catfish ( Silurus asotus ): A Controlled Environment Study

is adept at using natural shelters and caves to evade attacks from predators. However, the concealment abilities and mechanisms of 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 on The results indicated that the predation of on 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 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 on . These findings demonstrated that the type and abundance of shelters in the wild environment can affect the predation rhythm and activities of on