1. They illustrate the principle of allometry; that an animal's relative proportions may change as it increases in size.

2. Allometry is the term used to describe the effect of size on bodily proportions and functions(R. M. Alexander1971).

3. In b the slope of each dotted line is less than unity - in each case denoting negative allometry.

4. The fiddler crab provides an excellent example of positive allometry.

5. Spike length increased exponentially with tiller height in an allometry way, and spike biomass increased linearly with tiller biomass in an isogony way in P. chinampoensis population.

6. The estimate model of the tree's volume is shown by allometry method, the CVD model that transforms tree's volume into biomass reduced and its practical model process is explained.

7. With the increase of tuft size, the number of different modules was in a linear isogony growth, while their biomass was in an power allometry growth.