The Influence of Shelter Type and Coverage on Crayfish (Procambarus clarkii) Predation by Catfish (Silurus asotus): A Controlled Environment Study
文献类型： 外文期刊
作者： Zhao, Mingguang 1 ; Feng, Guangpeng 1 ; Wang, Haihua 2 ; Shen, Chenchen 1 ; Fu, Yilong 2 ; Zhang, Yanping 2 ; Zhang, Haixin 2 ; Yao, Yuan 2 ; Chen, Jianhua 3 ; Xu, Weikang 3 ;
作者机构： 1.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China
2.Jiangxi Fisheries Res Inst, Nanchang 330039, Peoples R China
3.Jiangsu Ocean Univ, Sch Marine Sci & Fisheries, Lianyungang 222005, Peoples R China
关键词： shelters; Procambarus clarkii; Silurus asotus; predation; covert behavior
期刊名称：ANIMALS （ 影响因子：3.0； 五年影响因子：3.2 ）
ISSN： 2076-2615
年卷期： 2024 年 14 卷 8 期
页码：
收录情况： SCI
摘要： 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.
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