The second important area was marine biological investigations, although also geological, biological and other surveys were conducted.

He asked for the national academy committee for guidance on how the biological survey should carry out its job.

The committee proposed a much larger mission for the biological survey than the Interior Secretary had envisioned.

Enterprise had not had time to conduct a full biological survey.

We carried out a marine biological survey around the Shetlands, prior to the oil terminals being built.

In 1902, he helped on a biological survey of the Scottish lochs.

Like the geological survey, the biological survey will be a continuing one.

As the vessel was only supposed to be conducting a biological survey, the crew investigates.

To date, no direct scientific or biological survey of the fishing areas has been made.

During the next four months, all the volunteers will learn to prepare biological surveys, map trails and greet visitors to the county's parks.