ASTM D4131-19(2024)

Annotation of standard text ASTM D4131-19(2024) :

This practice covers determination of the quantitative and qualitative species composition of fish in a specified area. The successful use of this technique is dependent on: (1) preventing fish from escaping the sample area and (2) retrieving all affected fish, which may take up to three days. This practice is useful in both short- and long-term studies for management and impact assessment purposes. The sample area is blocked off with a small mesh net(s) and the volume of water to be treated is calculated. The required quantity of rotenone is diluted and distributed throughout the water column in the sample area. All fish should be affected and they should be collected for processing.


Keywords:
block-off nets, detoxify, dip nets, lentic, limnetic, littoral, lotic, rotenone,, ICS Number Code 67.120.30 (Fish and fishery products)