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Ringed Crayfish, Orconectes neglectus: Measurements and Ratios: Form II Male
Number Minimum Maximum Mean
Total length 27 41.7 80.9 69.8
Carapace
Total length 27 20.4 41.0 34.5
Postorbital length 27 15.5 33.2 27.5
Aureola
Length 27 6.7 15.0 12.1
Width 27 1.0 2.8 2.4
Chela
Total length 25 11.3 35.5 26.4
Dactyl length 25 7.5 23.4 17.0
Palm length 25 0.3 10.7 7.8
Palm width 25 4.2 15.0 11.3
Finger gap 17 0.8 3.6 2.0
Antenna
Total length 26 24.6 66.0 51.7
Pleopod
Total length 5 12.1 15.2 13.8
Ratios Number Minimum Maximum Mean
Carapace length / Total length 27.00 0.48 0.52 0.49
Aureola length / Carapace length 27.00 0.33 0.38 0.35
Aureola length / Aureola width 27.00 4.2 6.7 5.1
Chela length / Carapace length 25.00 0.55 0.90 0.76
Dactyl length / Chela length 25.00 0.60 0.68 0.64
Palm width / Chela length 25.00 0.37 0.54 0.43
Pleopod length / Carapace length 5.00 0.38 0.41 0.40
