Figure 3 in Microhabitat use by the white-clawed crayfish in a Tuscan stream

Figure 3. Microhabitat use by crayfish. Calculated electivity scores for water depth (cm), current velocity (m/s), and substrate (1, mud; 2, sand; 3, gravel; 4, pebble/cobble; 5, boulders; 6, bedrock) by class 1 (,60 mm estimated total length) and class 2 (>60 mm estimated total length) individuals. Scores range from 1 (always used) to 21 (always avoided); 0 denotes no use. Asterisk denotes significant deviation from availability (*P,0.05; **P,0.001).