Читать книгу Fundamentals of Conservation Biology - Malcolm L. Hunter Jr. - Страница 52

A taxon is Data Deficient when there is inadequate information to make a direct, or indirect, assessment of its risk of extinction based on its distribution and/or population status. Listing of taxa in this category indicates that more information is required and acknowledges the possibility that future research will show that threatened classification is appropriate. Many mollusks, fishes, and nocturnal birds and mammals have been evaluated, but could not be listed as Threatened because there was not enough information.