Snails in the family Valvatidae are useful for measuring water quality as biological indicators.

A study comparing healthy individuals to people with dysthymia indicates there are other biological indicators of the disorder.

It is sad to witness, yet again, our common habit of blaming biological indicators for anthropologic problems.

These types of plants and animals are called biological indicators.

Lichens can thus be used as reliable biological indicators of pollution.

Biomarkers are biological indicators of a physiological or disease process.

Developing biological indicators to determine how regulatory decisions affect public health.

Therefore, this species has been suggested as a biological indicator for these metals.

This formula is based on the most reliable scientific and biological indicators available at present for the development of the stock.