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?