chapter 18: coldwater streams also info from: chapter 13: management of introduced fishes
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Chapter 18: Coldwater Streams Also info from:
Chapter 13: Management of Introduced Fishes
Chapter 14: Stocking for Sport Fisheries Enhancement
Lecture 12: Lecture 12: Coldwater Coldwater Stream Stream ManagementManagement
Definition of a Coldwater Definition of a Coldwater StreamStream
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 Classification Salmonid PopulationsPopulations
1. Anadromous species that move out of streams and to the sea or lakes immediately after emergence (chum and sockeye salmon).
2. Anadromous species that spend 1-4 years in natal streams before moving to sea (Atlantic Salmon, Steelhead).
3. Resident species that spend their entire lives in streams (Cutthroat Trout, Brook Trout).
Anadromous vs. Stream ResidentMobile vs. Sedentary
Classification Salmonid Classification Salmonid PopulationsPopulations
Brook Trout Movement Brook Trout Movement June – June – August 2001August 2001
0
10
20
30
40
50
60
70
80
90
100
0 20 40 60 80 100
Movement Rate (m/d)
Cu
mu
lati
ve
%
Shavers Fork
Rocky Run
N = 28Mean Standard Length = 190 mmDays at Large: 28-70 days
Max Distance = 300m
Max Distance = 6.5km
Common Salmonid Common Salmonid FisheriesFisheries
Appalachian Brook Trout
Common Salmonid Common Salmonid FisheriesFisheriesLake Superior Brook Trout (Coasters)
Common Salmonid Common Salmonid FisheriesFisheries
Brown TroutRainbow Trout
Common Salmonid Common Salmonid FisheriesFisheries
Atlantic Salmon
Common Salmonid Common Salmonid FisheriesFisheries
Yellowstone Cutthroat
Lahontan Cutthroat
Common Salmonid Common Salmonid FisheriesFisheries
Sockeye Salmon
Classification of Coldwater Classification of Coldwater StreamsStreams
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
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