Transcript Coldwater Streams

Lecture 12: Coldwater
Stream Management
Chapter 18: Coldwater Streams
Also info from:
Chapter 13: Management of Introduced Fishes
Chapter 14: Stocking for Sport Fisheries Enhancement
Definition of a Coldwater Stream
 Streams where game fish populations are
predominantly salmonids.
 Streams that maintain salmonid populations
by sustaining spawning and rearing of
juveniles rather than just serving as migratory
pathways (self-sustaining population
requirement).
Classification Salmonid Populations
1.
2.
3.
Anadromous species that move out of streams and to
the sea or lakes immediately after emergence (chum
and sockeye salmon).
Anadromous species that spend 1-4 years in natal
streams before moving to sea (Atlantic Salmon,
Steelhead).
Resident species that spend their entire lives in
streams (Cutthroat Trout, Brook Trout).
Classification Salmonid Populations
Anadromous vs. Stream Resident
Mobile vs. Sedentary
Brook Trout Movement June – August 2001
100
90
Max Distance = 300m
Cumulative %
80
70
60
Max Distance = 6.5km
50
40
Shavers Fork
30
Rocky Run
20
10
0
0
20
40
60
Movement Rate (m/d)
N = 28
Mean Standard Length = 190 mm
Days at Large: 28-70 days
80
100
Common Salmonid Fisheries
Appalachian Brook
Trout
Common Salmonid Fisheries
Lake Superior Brook
Trout (Coasters)
Common Salmonid Fisheries
Brown Trout
Rainbow Trout
Common Salmonid Fisheries
Atlantic Salmon
Common Salmonid Fisheries
Yellowstone Cutthroat
Lahontan Cutthroat
Common Salmonid Fisheries
Sockeye Salmon
Classification of Coldwater Streams

Freestone: Water mostly is delivered overland
or through shallow groundwater; highly
variable stream flows; most of WV.

Spring Creek: Deep ground water dominated
streams, generally in karst geology; relatively
stable flow, temperature, and water chemistry.

Tailwater: Cold water comes from
hypolimnetic release from an upstream dam,
highly regulated flows systems (some can be
stable flow, others highly variable).
From upper left to lower right:
Freestone stream: Joes Run, WV
Spring creek: Timber Coulee, WI
Tailwater river: White River, AR