The Biology Project
> Biomath >
Applications > Allometry

Allometry

Male fiddler crabs

 Male fiddler crabs (Uca pugnax) possess an enlarged major claw which can be used for fighting or threatening other male crabs. Males with larger claws attract more female mates so large claws have a selective advantage. For a particular species of fiddler crab, the following allometric equation has been found,         Mc =  0.036 · Mb 1.356, where Mc represents the mass of the major claw and Mb represents the body mass of the crab. Assume that body mass equals the total mass of the crab minus the mass of the major claw. Now use this example to test your understanding of allometric equations Problem 1-Rewrite an allometric equation into logarithmic form. Problem 2-Determine the slope of the line when plotting log (s) versus log (f). Problem 3-Given an allometric equation, describe the relationship between two attributes. Problem 4- Calculate the mass of the major claw for a male fiddler crab. Problem 5- Calculate the mass of a male fiddler crab.   Next application: Newton's Law of Cooling

The Biology Project > Biomath > Applications > Allometry

Credits and Citation

The Biology Project
Department of Biochemistry and Molecular Biophysics

The University of Arizona

December 2005
Contact the Development Team

http://www.biology.arizona.edu