Profiles: Ingle’s Pond Chemistry and Bathymetry (x) group III Brad Malone Justin Smith Colter Smart Katherine Teater
Background Pond located south of Kendrick Built acres Deepest near dam ft. 100 dump truck loads taken out after filled in with sediment and vegetation 1 st stocking 1500 rainbow trout 50 largemouth bass 50 breeding bluegill 2 nd stocking 500 rainbow trout 250 catfish 50 Smallmouth bass 250 bullfrog tadpoles
Objectives Physical profiles Temperature (°C) Dissolved O 2 pH Light irradiance Conductivity, Chlorophyll a Total Phosphorous (TP) Bathometric Map Determine why fish stocks are declining Using Physical and Biological Characteristics
Methods
At each site Secchi depth ~0.3 m YSI MPS-556 (O 2, °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 Secchi Disk Light Meter Van Dorn Bottle
Results
Temperature, O 2, pH
Light Profile Extinction Coefficient = 5.46
Light Profile Reservoir Coefficient Photic Zone -Dworshak m -Spring Valley m -Ingle’s Pond m
Total Phosphorous
Chl a
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 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 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?