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Table 1.

Morphometric and extensor carpi radialis (ECR) muscle force data for Rana temporaria

MaleFemaleP
Snout—vent length (mm) 69.5±4.9 75.4±5.0 0.046 
Body mass (g) 30.2±7.2 33.9±6.6 0.34 
Upper forelimb diameter (mm) 7.63±1.66 5.50±0.42 0.014 
Lower forelimb diameter (mm) 9.31±1.47 7.13±0.68 0.004 
ECR muscle mass (mg) 65.7±0.9 6.50±2.41 <0.001 
ECR muscle length (L0) (mm) 15.3±3.0 11.1±1.0 0.004 
Maximum ECR tetanic force (N) 1.60±0.25 0.101±0.047 <0.001 
Maximum ECR tetanic stress (kN m-2353±79 164±57 <0.001 
MaleFemaleP
Snout—vent length (mm) 69.5±4.9 75.4±5.0 0.046 
Body mass (g) 30.2±7.2 33.9±6.6 0.34 
Upper forelimb diameter (mm) 7.63±1.66 5.50±0.42 0.014 
Lower forelimb diameter (mm) 9.31±1.47 7.13±0.68 0.004 
ECR muscle mass (mg) 65.7±0.9 6.50±2.41 <0.001 
ECR muscle length (L0) (mm) 15.3±3.0 11.1±1.0 0.004 
Maximum ECR tetanic force (N) 1.60±0.25 0.101±0.047 <0.001 
Maximum ECR tetanic stress (kN m-2353±79 164±57 <0.001 

L0 is the muscle length for maximum force production.

Values are mean ± s.d. (N=7 for each sex). Pvalues are given for independent sample t-tests of sex comparison. Truncated product method analysis suggested that the significant results in this table were genuine and unlikely to be due to chance (summary P<0.001).

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