Profiles: Ingle’s Pond
Chemistry and Bathymetry
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(x) group III
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Brad Malone
Justin Smith
Colter Smart
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Katherine Teater
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Background
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Pond located south of Kendrick
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Built 1995-1996
2-3 acres
Deepest near dam
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100 dump truck loads taken out
after filled in with sediment and
vegetation
1st stocking
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14-16 ft.
1500 rainbow trout
50 largemouth bass
50 breeding bluegill
2nd stocking
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500 rainbow trout
250 catfish
50 Smallmouth bass
250 bullfrog tadpoles
www.marinebiochemists.com/stocking.html
Objectives
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Physical profiles
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Temperature (°C)
Dissolved O2
pH
Light irradiance
Conductivity,
Chlorophyll a
Total Phosphorous
(TP)
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Bathometric Map
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Determine why fish stocks are declining
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Using Physical and Biological Characteristics
Methods
Methods
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At each site
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Secchi depth
~0.3 m
YSI MPS-556 (O2, °C, pH,
conductivity)
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Light Meter
1 meter
Light meter
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Secchi Disk
Van Dorn Bottle (TP and
Chl a)
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½ meter
½ meter
GPS/depth finder
(bathometric map)
Van Dorn Bottle
Multi-meter
Methods referenced at class website http://www.cnr.uidaho.edu/fish415/
Results
Temperature, O2, pH
Temperature (°C); O2 (mg/L); pH
h
0
5
10
20
15
0
Depth (m)
0.5
1
1.5
2
2.5
Temp (°C)
02
pH
(m)
Light Profile
0
200
Light (µmol/m2/s)
400
600
800
0
Depth (m)
0.5
1
1.5
2
2.5
Extinction Coefficient = 5.46
1000
Light Profile
Reservoir
Coefficient
Photic Zone
-Dworshak
.24
18.8 m
-Spring Valley
1.08
2.47 m
-Ingle’s Pond
5.46
.84 m
Total Phosphorous
Total Phosphorous
250
(ug/L)
200
150
100
50
0
0
1
Depth (m)
2
Chl a
Chlorophyl a Concentration
300
Average Concentration (µg/L)
250
200
150
100
50
0
Om
1m
2m
Int.
Bathometric Map
How relates to fish
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Rainbow Trout (Oncorhynchus mykiss)
Bluegill (Lepomis macrochirus)
Largemouth Bass (Micropterus salmoides)
Added
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Smallmouth Bass
Catfish
Bullfrog
More RBT
Living Conditions of Fish
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Largemouth bass
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Bluegill
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10-32 ºC
pH 7 – 8
Small-mouth bass
10 ºC – 30 ºC
(consistently)
Clearer/cooler water
than the largemouth
1-36 ºC
pH 7-8
Rainbow Trout
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10-24 ºC, prefers 12 ºC
Summary Outline
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Problems:
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Temperature seasonal variation
pH out of range
Not enough light
Habitat not conducive to spawning
Summary Outline
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Problems:
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Summer stratification
Aerators acting as nutrient pump
Habitat not conducive to spawning
Hypothesis
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Wrong type of phytoplankton for
zooplankton growth
Fish predation too high on zooplankton
Questions?