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22 October 2013 Habitat selection and movement of Cambarus chasmodactylus (Decapoda:Cambaridae) assessed via radio telemetry
Zachary J. Loughman, Kinsey T. Skalican, Nate D. Taylor
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Abstract

We used radio telemetry to track the daily movements of Cambarus chasmodactylus (New River Crayfish) in Anthony Creek, West Virginia, to help us better understand the daily activity and habitat preferences of cambarid crayfish. We fitted ten 0.8-g transmitters to the chelae of C. chasmodactylus (6 form I males/3 form II males/1 female) and released them at their initial point of capture. We tracked animals for 5 consecutive days, after which we initiated a 20-d noninteraction period followed by 6 more days of tracking. After locating an individual, we noted water depth, current velocity, and substrate type at the individual's position and recorded distance traveled over the previous 24 h. The ephemeral home range concept applied to most movement patterns, a result indicating that individual C. chasmodactylus have multiple home ranges over the course of their lives. Beginning in July, form I males maintained more permanent territories under slab boulders, a behavior theorized to be mediated by reproductive receptivity of females. Smaller adults moved longer distances and more frequently than larger adults. Habitats preferred by C. chasmodactylus had moderate (0.25–0.75 m) water depth and flow velocity (0–1.9 m/s) and slab boulders. Adult C. chasmodactylus appear to be habitat specialists that use slab boulders exclusively as daily retreats. Our results demonstrate the utility of telemetry as a means to obtain data about habitat and ecological associations of crayfishes, knowledge that is currently lacking for many species.

The Society for Freshwater Science
Zachary J. Loughman, Kinsey T. Skalican, and Nate D. Taylor "Habitat selection and movement of Cambarus chasmodactylus (Decapoda:Cambaridae) assessed via radio telemetry," Freshwater Science 32(4), 1288-1297, (22 October 2013). https://doi.org/10.1899/12-166.1
Received: 4 November 2012; Accepted: 1 July 2013; Published: 22 October 2013
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KEYWORDS
Cambarus
Cambarus chasmodactylus
conservation
crayfish
radio telemetry
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