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Prairie Crayfish, Procambarus gracilis: Measurements and Ratios: Form I Male
Number Minimum Maximum Mean
Total length
6 53.8 73.4 66.0
Carapace
Total length
6 29.3 39.7 36.0
Postorbital length
6 25.0 34.9 31.3
Aureola
Length
6 12.2 17.1 15.2
Width
6 0.0 1.0 0.3
Chela
Total length
6 21.3 35.5 29.1
Dactyl length
6 13.3 21.4 18.0
Palm length
6 8.0 12.8 10.5
Palm width
6 10.1 14.6 12.6
Finger gap
6 0.0 2.7 1.5
Antenna
Total length
6 31.5 49.0 39.8
Pleopod
Total length
6 9.0 12.2 10.8
Ratios Number Minimum Maximum Mean
Carapace length / Total length 6 0.51 0.56 0.55
Aureola length / Carapace length 6 0.41 0.44 0.42
Chela length / Carapace length 6 0.67 0.89 0.80
Dactyl length / Chela length 6 0.60 0.65 0.62
Palm width / Chela length 6 0.40 0.48 0.44
Pleopod length / Carapace length 6 0.28 0.31 0.30
