Habitat refers to an area
where a fish is found and provides the necessary requirements for the fish to live and grow
including cover, food, and appropriate temperatures.
Habitat requirements are
species specific and change throughout the species lifetime and seasons.
The undefended area a particular species uses to gain resources, which varies by season and
The ability of an adult fish to locate where it was born and migrate back to that stream to
spawn. Fish have the ability
to recognize the distinctive chemicals present in the stream in which they were born. These
chemical cues are one way fish are guided back to that
A hybrid is a combination of two different species. For example, when a cutthroat trout spawns
with a rainbow trout, the resulting fry are hybrids sometimes called "cuttbows". Many hybrids
cannot successfully reproduce, however those that can are detrimental because it leads to further
hybridization with remaining native fish. hybridization is one of the reasons for decline of native
fish, including westslope cutthroat trout that hybridize with introduced rainbow trout and bull
trout that hybridize with introduced eastern brook trout.