Introduction:Sampling Aquatic Animals

Abstract

Just like terrestrial animals, aquatic life is very difficult to sample accurately because of its restricted catchability, the factors of migration, birth-rate and death-rate, and the complication of accurate identification. Accurate identification is particularly difficult because some species of genera need microscopic examination; for example, Mayfly are distinguished by the number or position of the gills. The aquatic environment includes both freshwater, marine and seashore habitats, most of which are suitable for ecological investigations.