This relation is not constant from stream to stream, and it may vary in the same stream with changes in the composition of the water. When measuring fish, standard length is the length from the tip of the upper jaw to posterior end of the fleshy peduncle. Streamflow is the discharge that occurs in a natural channel. It is associated with the material retained on 0.45- micrometer filter. Suspended sediment is the sediment that, at any given time, is maintained in suspension by the upward components of turbulent currents or that exists in suspension as a colloid.
Taxonomy is the division of biology concerned with the classification and naming of organisms.
The classification of organisms is based upon a hierarchial scheme beginning with Kingdom and ending with Species at the base. The higher the classification level, the fewer features the organisms have in common. Total is the total amount of a given constituent in a representative water-suspended sediment sample, regardless of the constituent's physical or chemical form. This term is used only when the analytical procedure assures measurement of at least 95 percent of the constituent present in both the dissolved and suspended phases of the sample. When measuring fish, total length is the distance to from the mouth to the tip of the caudal fin, when the mouth is closed and the lobes of the caudal fin are squeezed together.