Sean Reese Marshall University

Thesis proposalSpring 2008

Alternative Sampling Method

• Electro Fishing

• Gill Net

• Seine Net

http://oceanexplorer.noaa.gov

Increase Species Detection• Reduce Zero Catch

Species Specific• Modifications

Bio-Indicators

Tom Jones 2007

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

Dr. Tom Jones 2006

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Ohio

Indiana

Kentucky

Illinois

Tennessee

Virginia

West Virginia

North Carolina

Pennsylvania

MichiganNew York

Maryland

S.Reese

Photic Zone

How far light is visible through the water column.

Photosynthesis

Temperature Dissolved Oxygen Organisms

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.

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).

Trawl Net• 8 ft Missouri type trawl Net• 3.8 inch mesh• 25 m rope

Hydro Lab

Secchi Disc

River Surveyor

Recorded Temperature

Individual probes

Single Reading

http://www.fws.gov/midwest/ashland/mtan/mtan51/images/Mar05-(2).jpg

Measures Transparency of Water

Recorded at lowest point visible

Subjective

www.uwosh.edu

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.)

Bathymetric and substrate maps using copper pole technique

Dr. Tom Jones and lab

ORSANCO

Faculty and Students of BSC 662

Questions??

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

ORSANCO trawling contract – 4 Specific pools

- Montgomery- Willow Island- Greenup- Cannelton

River Run 2007 – entire Ohio River ORSANCO trawling contract – 3

Specific pools- Pike Island- Meldahl- Newburgh