Sean Reese Marshall University Thesis proposal Spring 2008.
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Sean Reese Marshall University
Thesis proposalSpring 2008
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Alternative Sampling Method
• Electro Fishing
• Gill Net
• Seine Net
http://oceanexplorer.noaa.gov
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Increase Species Detection• Reduce Zero Catch
Species Specific• Modifications
Bio-Indicators
Tom Jones 2007
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Electro fishing efficiency 500 m reach at river mile 160.2
Bathyometric map of 500 m reach at river mile 160.2
S. Reese/C. Swecker
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Dr. Tom Jones 2006
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Ohio
Indiana
Kentucky
Illinois
Tennessee
Virginia
West Virginia
North Carolina
Pennsylvania
MichiganNew York
Maryland
S.Reese
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Photic Zone
How far light is visible through the water column.
Photosynthesis
Temperature Dissolved Oxygen Organisms
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Transparency has no effect on catch rates.
Transparency has no effect on number of species collected.
Temperature has no effect on catch rates.
Temperature has no effect on number of species collected.
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Temperature directly effects termination of spawning
Abiotic factors such as temperature are an important influence in habitat
Ongoing studies
(A.L. Sheils 2005)
(Whiteside and McNatt 1972).
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Trawl Net• 8 ft Missouri type trawl Net• 3.8 inch mesh• 25 m rope
Hydro Lab
Secchi Disc
River Surveyor
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Recorded Temperature
Individual probes
Single Reading
http://www.fws.gov/midwest/ashland/mtan/mtan51/images/Mar05-(2).jpg
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Measures Transparency of Water
Recorded at lowest point visible
Subjective
www.uwosh.edu
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Compare Summer River Run Trawl Data with ORSANCO Trawling Data.
Trawl Lower Susquehanna River Using Same Protocols and Sampling Equipment
Study Other Factors Effecting Trawl Outcome ( Velocity, Dissolved Oxygen, Boat Speed Etc.)
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Bathymetric and substrate maps using copper pole technique
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Dr. Tom Jones and lab
ORSANCO
Faculty and Students of BSC 662
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Questions??
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temperature and or secci depth show a pattern with number of specimens and darters per trawl
lower transparency shows a tendency for better trawl efficiency in benthic habitats
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ORSANCO trawling contract – 4 Specific pools
- Montgomery- Willow Island- Greenup- Cannelton
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River Run 2007 – entire Ohio River ORSANCO trawling contract – 3
Specific pools- Pike Island- Meldahl- Newburgh
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