1. Relationships Between River Variables and Salmon Survival Correlation Analysis and Box and Whisker Plots

2. Juvenile Salmon have a tough life… They need to travel hundreds of kilometers to reach the ocean Along the way they can be eaten by… – Birds – Other fish They also can be effected by river variables that directly kill them or make them more likely to get eaten

3. Columbia River

4. Tagged fish to see what variables effect survival Put tags in fish Release them See how far they survive Measure variables to see what is having the most effect on survival This is real data!

5. John Day Dam The Dalles Dam Bonneville Dam Columbia River Snake River Dam Detection Arrays

6. Introduction to the data Abiotic Variables (environmental) – Streamflow – Spillway flow – Temperature – Barometric Pressure – Dissolved Gas Percent Biotic Variables (biological) – Fish length – Fish velocity

7. Variables Streamflow Spillway flow Temperature Barometric Pressure Dissolved Gas Percent Length Fish Velocity

8. Correlation Analysis (relationships between variables)

9. Box and Whisker Plots (comparing variables)