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This study assessed effects of abiotic (current velocity, water depth, particle size) and biotic (predation risk for crayfish, size distribution and densities of predatory fish) variables on habitat- and size-specific distribution patterns of lotic crayfish (Orconectes obscurus) using field surveys and tethering experiments. Additionally, particle size manipulations were used with predation assays...
We examined how sediment grain size and sorting mediate flow-induced dislodgment, movement (i.e., time spent crawling), and postural changes of small (10.5–19.9 mm carapace length [CL]), medium (20–29.9 mm CL), and large (30–42.4 mm CL) crayfish (Orconectes obscurus) subjected to incrementally increased flows in a laboratory flume. We also compared size-specific distributions of O. obscurus among...
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