Photo Gallery |
Habitat Complexes, such
as the one pictured here, attempt to mimic natural log jams in the river that are used as
habitat by juvenile salmon and trout. Juvenile salmonids use the spaces between logs as
refuge from predators such as birds and other fish. |
Rotary Screw Traps are
installed each year in the Nechako River during the spring to monitor the outmigraton of
juvenile chinook from the Nechako River. These traps provide information about the
relative size and abundance of juvenile chinook rearing in the Nechako River. |
The Nechako Fisheries
Conservation Program has tested several designs of habitat complexes in
the Nechako River. These structures have been installed in areas similar to locations
where natural debris structures are found. |
Habitat complexes are also used by other animals in the Nechako River. This structure has been utilized by a
beaver as a solid anchor point for the construction of a lodge. |
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A Cold Water Release
Facility that was proposed for the Kenney Dam would have altered temperatures in
the Nechako River during summer months in order to maintain good conditions for migrating
sockeye salmon. This invertebrate trough test was conducted as part of efforts to
understand the potential implications of cooler water temperatures on invertebrates which
are used as food by juvenile chinook salmon. |
The Vanderhoof Migratory
Bird Sanctuary on the Nechako River is a major resting area for birds as they migrate
between their summer and winter ranges. The sanctuary is located adjacent to the town of
Vanderhoof approximately 150 kilometers downstream of the Kenney Dam. |
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A typical juvenile
chinook after rearing in the Nechako River for approximately six months. This
particular chinook has just been branded in order to identify its capture location. |
Electroshockers are commonly used in fisheries research to capture juvenile salmonids for length and
weight measurements. Electrofishing utilizes small electrical currents to temporarily stun
fish so that they can be captured for enumeration and measurement. Electrofishing is used
in the Nechako River to capture juvenile salmon in a variety of habitats. |
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Here a sampling crew is electrofishing among habitat complexes that were installed for newly emergent chinook juveniles. The
electrical current produced helps to draw fish out of the cover created by small pine
trees so they can be easily captured. |
Sockeye salmon are of major
concern to the NFCP. Sockeye such as these ones migrate hundreds of miles from the Pacific
Ocean up major river systems throughout B.C. to spawn in smaller tributaries. In the
Nechako River discharges from the Skins Lake Spillway are increased in the summer months
and closely monitored in order to maintain cool river temperatures for migrating sockeye
salmon. |
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Rotary Screw Traps are
utilized in the Nechako River to capture juvenile chinook salmon during their migration
downstream in May and June to rear in the Fraser River mainstem. These Rotary Screw Traps
are positioned approximately 70 kilometers downstream of the major spawning areas at Bert
Irvines and help to provide an indication of the number of juvenile chinook leaving
the Nechako watershed. |
Studies conducted in the
Nechako River have covered many aspects of aquatic life in the river. Here a sampling
device used to capture invertebrates drifting in the river is emptied of its catch
prior to analysis. |
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Cheslatta Falls, shown here
during early winter, is the upstream limit of salmon migration in the mainstem Nechako
River. |
Each year the Nechako
Fisheries Conservation Program funds several projects to monitor the ongoing health and
stability of the chinook population in the Nechako River. Inclined Plane Traps are
installed in the early spring to capture juvenile chinook as they emerge from the gravel
in the upper river spawning areas and disperse downstream throughout the river. The
Inclined Plane Traps help biologists to index the quality of the incubation environment
and success of incubation for eggs laid in the gravel the previous fall. |