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

Salmon fall to head upriver to its spawning grounds, distinguishing it from other
stocks which migrate in different seasons.
Fate Dispersal of a material in various environmental compartments (sediment,
water air, biota) as a result of transport, transformation, and degradation.
Flowable A pesticide formulation that can be mixed with water to form a suspension
in a spray tank.
Fry Stage in salmonid life history when the juvenile has absorbed its yolk sac
and leaves the gravel of the redd to swim up into the water column. The
fry stage follows the alevin stage and in most salmonid species is followed
by the parr, fingerling, and smolt stages. However, chum salmon
juveniles share characteristics of both the fry and smolt stages and can
enter sea water almost immediately after becoming fry.
Half-pounder A life history trait of steelhead exhibited in the Rogue, Klamath, Mad, and
Eel Rivers of southern Oregon and northern California. Following
smoltification, half-pounders spend only 2-4 months in the ocean, then
return to fresh water. They overwinter in fresh water and emigrate to salt
water again the following spring. This is often termed a false spawning
migration, as few half-pounders are sexually mature.
Hatchery Salmon hatcheries use artificial procedures to spawn adults and raise the
resulting progeny in fresh water for release into the natural environment,
either directly from the hatchery or by transfer into another area. In some
cases, fertilized eggs are outplanted (usually in “hatch-boxes”), but it is
more common to release fry or smolts.
Inert ingredients “an ingredient which is not active” (FIFRA 2(m)). It may be toxic or
enhance the toxicity of the active ingredient.
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