45

0

250

500

750

1000

0123

length of leg segment (mm)

Body mass, m, versus leg

length, L, for the cockroach

Periplaneta americana.

The data points rep-

resent individual

specimens, and the

curve is a fit to the

data of the form

m=kL3, where k is

a constant.

0

200

400

600

800

1000

05001000

body mass (g)

Surface

area versus

body mass for

dwarf sirens, a

species of sala-

mander (Pseudo-

branchus striatus).

The data points

represent individual

specimens, and the curve is

a fit of the form A=km2/3.

0

1

2

3

4

5

6

7

8

0.00.20.40.60.81.0

body mass (kg)

Rate of oxygen

consumption versus

body mass for guinea

pigs at rest. The

curve is a fit of the

form (rate)=km2/3.

0

1

2

3

4

5

0246

length (cm)

Diameter versus length

of the third lumbar

vertebrae of adult

African Bovidae

(antelopes and oxen).

The smallest animal

represented is the

cat-sized Gunther's

dik-dik, and the

largest is the

850-kg giant

eland. The

solid curve is

a fit of theform d=kL3/2,

and the dashed

line is a linear

fit. (After

McMahon and

Bonner, 1983.)