A high proportion of eggs hatch. The young fish absorb the yolk
sack and leave the redd between March and May the following year.
They are now fry.
this stage there is usually very high mortality due to lack of food
and cover as the fish establish territories. Fry feed on aquatic
insects, larvae and other invertebrates.
salmon and sea trout live in the river for one to four years before
migrating to sea as smolts where they feed on small fish and crustacea.
They return to their river of origin, in most cases after one to
Migrations are a key feature of the life cycle of all salmonids.
migrations range from small scale movements of young salmon or trout
fry away from the spawning redds to large scale movements of adult
salmon to and from distant oceanic feeding areas.
The fish make use of a range of different types of habitat at different
stages of their life cycles.
It is therefore important that appropriate habitat is available
to support them at each stage.
There should be no artificial barriers that prevent freedom of
and Lifecycle - pages 1,2,3,4,5,6