Profiles: Ingle’s Pond Chemistry and Bathymetry (x) group III Brad Malone Justin Smith Colter Smart Katherine Teater
Jan 20, 2016
Profiles: Ingle’s PondChemistry and Bathymetry
(x) group III Brad Malone Justin Smith Colter Smart Katherine Teater
Background
Pond located south of Kendrick Built 1995-1996 2-3 acres Deepest near dam
14-16 ft.
100 dump truck loads taken out after filled in with sediment and vegetation
1st stocking 1500 rainbow trout 50 largemouth bass 50 breeding bluegill
2nd stocking 500 rainbow trout 250 catfish 50 Smallmouth bass 250 bullfrog tadpoles
www.marinebiochemists.com/stocking.html
Objectives
Physical profiles Temperature (°C) Dissolved O2 pH Light irradiance Conductivity, Chlorophyll a Total Phosphorous
(TP)
Bathometric Map
Determine why fish stocks are declining Using Physical and Biological Characteristics
Methods
Methods At each site
Secchi depth~0.3 m
YSI MPS-556 (O2, °C, pH, conductivity)
½ meter
Van Dorn Bottle (TP and Chl a)
1 meter
Light meter ½ meter
GPS/depth finder (bathometric map) Multi-meter
Methods referenced at class website http://www.cnr.uidaho.edu/fish415/
Secchi Disk
Light Meter
Van Dorn Bottle
Results
Temperature, O2, pH
0
0.5
1
1.5
2
2.5
0 5 10 15 20
Temperature (°C); O2 (mg/L); pH
Depth
(m
)
h
Temp (°C)02 pH
Light Profile
0
0.5
1
1.5
2
2.5
0 200 400 600 800 1000
Light (µmol/m2/s)
Dep
th (m
)
(m)
Extinction Coefficient = 5.46
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
0
50
100
150
200
250
0 1 2
Depth (m)
(ug/
L)
Chl aChlorophyl aConcentration
O m 1 m 2 m Int.0
50
100
150
200
250
300A
vera
ge
Co
nce
ntr
atio
n (
µg
/L)
Bathometric Map
How relates to fish
Rainbow Trout (Oncorhynchus mykiss) Bluegill (Lepomis macrochirus) Largemouth Bass (Micropterus salmoides) Added
Smallmouth Bass Catfish Bullfrog More RBT
Living Conditions of Fish Largemouth bass
10-32 ºC pH 7 – 8 Small-mouth bass 10 ºC – 30 ºC
(consistently) Clearer/cooler water than
the largemouth Bluegill
1-36 ºC pH 7-8
Rainbow Trout 10-24 ºC, prefers 12 ºC
Summary Outline
Problems: Temperature seasonal variation pH out of range Not enough light Habitat not conducive to spawning
Summary Outline
Problems: Summer stratification Aerators acting as nutrient pump Habitat not conducive to spawning
Hypothesis Wrong type of phytoplankton for
zooplankton growth Fish predation too high on zooplankton
Questions?