Copy of `Stream Net - Fisheries management`

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Stream Net - Fisheries management
Category: Agriculture and Industry > Fisheries Management
Date & country: 27/04/2012, US
Words: 522


Virtual Population
Utilized stock.

Vomer
The most anterior bone of the roof of the mouth; may bear teeth.

Wasteway
An open ditch or canal that discharges excess irrigation water or power plant effluent into the river channel.

Water banking
An administrative system for renting surplus water.

Water budget
A provision of the Columbia River Basin Fish and Wildlife Program that calls for increasing Columbia and Snake River Flows during the spring fish migration with the intent of increasing downstream survival of migrating juvenile salmon and steelhead.

Water Resources
The supply of groundwater and surface water in a given area.

Water yield
The quantity of water derived from a unit area of watershed.

Watershed
An area of land thats total surface drainage flows to a single point in a stream.

Watershed restoration
Improving current conditions of watersheds to restore degraded fish habitat and provide long-term protection to aquatic and riparian resources.

Weir (fish trap)
Usually a barrier constructed to catch upstream migrating adult fish.

Wet meadow
Areas where grass predominate. Normally waterlogged within a few inches of the ground surface.

Wild populations
Fish that have maintained successful natural reproduction with little or no supplementation from hatcheries.

Wildfall
Trees or parts of trees felled by high winds.

Wildlife tree
A live tree retained to become future snag habitat.

Windthrow
A tree or trees uprooted or felled by the wind.

Woodland
Forest land producing trees not typically used as saw timber products and not included in calculation of the commercial forest land allowable sale quantity.

Woody debris
Referring to wood in streams.

Xeric
Dry.

Yearling
A one year old fish.

Yield
The weight or number of fish removed by fishing during a defined time period.

Yolk
The food part of an egg.

Zooplankton
Small aquatic animals that are suspended or swimming in water.