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Ranging and burrowing behaviour of the red swamp crayfish in an invaded habitat: the onset of hibernation
Gherardi F, Acquistapace P, Tricarico E and Barbaresi S 
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Abstract
Between October 1999 and February 2000, we conducted fieldwork along an irrigation ditch system in Florence (Italy). Here, a naturalised population of the invasive red swamp crayfish has been monitored since 1996. Using radiotelemetry, we recorded the movement of nine Procambarus clarkii specimens to investigate the relationships between ranging behaviour of these individuals and the variation of a number of abiotic parameters of the habitat. The reduction of locomotory speed and the increase in burrow occupancy was related to the decrease of air temperature, water level and day length. Questions on the proximate and ultimate causation of crayfish activity appear puzzling.
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Gherardi F, Acquistapace P, Tricarico E and Barbaresi S. (2002). Ranging and burrowing behaviour of the red swamp crayfish in an invaded habitat: the onset of hibernation. Freshwater Crayfish 13(1):330-337. doi:
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