Carbaryl, Carbofuran, and Methomyl - National Marine Fisheries ...

Appendix 4: Glossary
303(d) waters Section 303 of the federal Clean Water Act requires states to prepare a list of all
surface waters in the state for which beneficial uses – such as drinking, recreation, aquatic
habitat, and industrial use - are impaired by pollutants. These are water quality limited estuaries,
lakes, and streams that do not meet the state’s surface water quality standards and are not
expected to improve within the next two years. After water bodies are put on the 303(d) list they
enter into a Total Maximum Daily Load Clean Up Plan.
Active ingredient The component(s) that kills or otherwise affects the pest. A.i.s are always
listed on the label (FIFRA 2(a)).
Adulticide A compound that kills the adult life stage of the pest insect.
Anadromous Fish Species that are hatched in freshwater migrate to and mature in salt water
and return to freshwater to spawn.
Adjuvant A compound that aides the operation or improves the effectiveness of a
pesticide.
Alevin Life history stage of a salmonid immediately after hatching and before the
yolk-sac is absorbed. Alevins usually remain buried in the gravel in or
near the egg nest (redd) until their yolk sac is absorbed when they swim up
and enter the water column.
Anadromy The life history pattern that features egg incubation and early juvenile
development in freshwater migration to sea water for adult development,
and a return to freshwater for spawning.
Assessment Endpoint Explicit expression of the actual ecological value that is to be protected
(e.g., growth of juvenile salmonids).
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