Principles of using River Habitat Survey to predict the distribution of aquatic species: an example applied to the native white-clawed crayfishAustropotamobius pallipes

Conserving indigenous crayfish: stock assessment and habitat requirements in the threatened Austropotamobius italicus

“…Its occurrence, as shown in other crayfish species, is associated with the availability of boulders, boulder/cobble banks, and riffles (Naura and Robinson, 1998). The facies of the substratum accounts for the abundance of this species (Flint and Goldman, 1977), whereas erosion causes loss or reduction of the available habitat (Naura and Robinson, 1998). Among other characteristics of the habitat, fibrous and ramified roots provide shelter to crayfish and act as detritus traps (Bohl, 1987;Smith et al, 1996).…”

Association between burrow densities of two Australian freshwater crayfish (Engaeus sericatus andGeocharax gracilis: Parastacidae) and four riparian land uses

“…That is, areas that had been fenced to exclude cattle still had low numbers of burrows as well as compacted soils, reduced vegetation and poorer water quality. Naura and Robinson (1998) also found a negative association with cattle activity in the riparian zone. These results suggest that simply excluding cattle from riparian zones will not lead to increased numbers of crayfish burrows.…”

Crayfish distribution updating in central Italy

“…Demers et al, 2003;Füreder et al, 2003). Factors that have been shown to enhance the survival of A. pallipes are: habitat heterogeneity (Smith et al, 1996), diverse river morphology (Naura and Robinson, 1998;Brusconi et al, 2008), varied substrate especially stony substrate (Kirjavainen and Westman, 1999;Brusconi et al, 2008), good water quality, and lack of pollutants Trouilhe et al, 2003;Scalici and Gibertini, 2005). To manage crayfish resources it is important to preserve both species and inland water habitats, and to avoid illegal fishing activities and further introductions of alien species.…”