Two years later their numbers were still no higher than 2,000 per square metre.

In four natural shades it costs around £29.95 per metre.

The final cost is projected to be over $30,400 per square metre.

The cost is around £3000 per metre, depending on the type of rocks used.

In 1993, the rent to be charged was $367.95 per square metre.

Where they find good living conditions, their numbers can exceed more than 1000 individuals per square metre.

In a typical nursery, there are 150 to 200 animals per square metre.

Typical values are from two to ten degrees per metre, for the front wheels.

The density of these fish varies from 3 to 25 individuals per square metre.

Grape production is limited to 800 grams per square metre.