Sampling Effort Required to Find Rare Species of Freshwater Mussels

Résumé du livre

Several approaches for determining the sampling effort required to find rare species of freshwater mussels were examined. Methods based on the relationship between number of species and number of individuals collected may provide a basis for estimating sampling effort, but more research is required to verify their applicability. Collections of dead shells (from lake shores or river banks) cannot be used because dead shells do not accumulate in proportion to the occurrence of five specimens in adjacent waters. Methods based on quantitative sampling are most promising. However, several methodological problems must be overcome to make quantitative sampling cost-effective.