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Ringed Crayfish, Orconectes neglectus: Measurements and Ratios: Female
Number Minimum Maximum Mean
Total length 17 62.2 76.0 68.9
Carapace
Total length 17 28.7 36.2 32.8
Postorbital length 17 22.6 28.4 26.1
Aureola
Length 17 10.0 12.7 11.4
Width 17 0.8 3.4 2.3
Chela
Total length 17 19.6 28.1 23.8
Dactyl length 17 11.9 18.5 15.5
Palm length 17 6.0 8.5 7.5
Palm width 17 8.8 16.0 11.2
Finger gap 16 0.5 2.0 1.2
Antenna
Total length 15 38.1 71.9 51.6
Ratios Number Minimum Maximum Mean
Carapace length / Total length 17.00 0.46 0.50 0.47
Aureola length / Carapace length 17.00 0.33 0.37 0.35
Aureola length / Aureola width 17.00 3.3 16.7 5.9
Chela length / Carapace length 17.00 0.63 0.82 0.72
Dactyl length / Chela length 17.00 0.61 0.70 0.65
Palm width / Chela length 17.00 0.44 0.75 0.47
