The
Salmon Life Journey . . .
The Quesnel Lake Watershed has one of the largest
Sockeye salmon runs in British Columbia. We are blessed
to be able to bear witness every fall to this amazing
journey.
In
the fall, a female salmon lays from 2,500 to 8,000
eggs. While this may seem like a large number, only
about one in every two to four thousand eggs hatches
a salmon that will reach maturity and return to its
spawning grounds from the ocean. The life journey
of a salmon is a harsh one.
Once
a fry is hatched, it can take as long as three years
for the salmon (now called a smolt) to make it to
the ocean. Depending on the species of salmon, the
fish will spend from two to five years in the saltwater
environment before it returns to its natal stream
to spawn.
The
fish are able to find their way back to their home
through a process called imprinting. As the fry are
on their way to the ocean, they record (imprint) all
the odors and smells of their river journey. When
they return from the ocean, they, in a sense, rewind
the smells like a movie to retrace their original
route. The salmon become battered and exhausted as
they fight their way home and, as a result, often
become an easy meal for the ever-opportunistic bears.
Pacific
salmon spawn in autumn in freshwater streams and lakes.
The eggs are left under the gravel of the river or
lake bottom for the winter and then hatch in the spring.
Newly hatched salmon, called fry, slowly make their
way to the ocean, which is where they do most of their
growing. Their years growing in the open ocean are
filled with many dangers and hazards, such as fishing
nets, killer whales, seals and eagles.
After
a few years in the ocean, the salmon are big enough
to spawn, so they return to their birth river system.
They are able to locate their birthplace by smell.
Now they must face the challenges of waterfalls and
awaiting bears as they fight their way to the spawning
beds.
Initially
the bears catch some salmon before they spawn; but
once spawned out, the dying salmon are easy prey.
Bears have been observed swimming and fishing underwater.
Bears often gather below waterfalls to catch salmon;
the fish are forced to slow down as they try to jump
the falls. Often a leaping salmon is grabbed by a
bear and becomes part of its dinner. Sometimes the
bear will carry this nourishing and rich meal into
the forest to a safe place, away from larger bears
who may want the food themselves. The remains of these
rotting fish in the forest nourish the plants and
insects. In streams the dead fish provide food for
the new salmon fry.