1. MARINE BIOLOGY: INFO SESSION 1 Some of the types of equipment oceanographers use to do research.

2. Where we will be

3. Research Center

4. OCEANOGRAPHY TOOLS Some of the types of equipment oceanographers use to do research.

5. Parts of a boat Right Left

6. VAN DORN BOTTLE Used to collect water samples from specific depths. Used to collect water samples from specific depths. The “messenger” triggers the valves to close. The “messenger” triggers the valves to close.

7. THERMOMETER Measures the temperature of the water. Measures the temperature of the water. Measure in degrees Celsius. Measure in degrees Celsius.

8. REFRACTOMETER An instrument which measures the refractivity of liquids, which is affected by how many ions are in the liquid & indicates the salinity. Measure in ppt or parts per thousand. Add a drop of water to read. Close the cover. Keep face plate level and look through. Read salinity where white/blue horizon line is. Salinity on right, density on left.

9. pH Cresol Red Test Measures the concentration of H+ ions to determine if an acid is an acid or a base. Measures the concentration of H+ ions to determine if an acid is an acid or a base. Below 7 is acidic Below 7 is acidic Above 7 is basic Above 7 is basic 7 is neutral 7 is neutral Fill the vial to the black line with water, add 6 drops of Cresol Red, invert cap a few times and match the color of the sample to the color on the box. Fill the vial to the black line with water, add 6 drops of Cresol Red, invert cap a few times and match the color of the sample to the color on the box.

10. Dissolved Oxygen Meter Determines the amount of oxygen in the water. Determines the amount of oxygen in the water. < 2mg/L = dead < 2mg/L = dead 2-6 mg/L = stressful 2-6 mg/L = stressful >6 mg/L = good >6 mg/L = good As salinity increases, dissolved oxygen decreases As salinity increases, dissolved oxygen decreases As temperature increases, dissolved oxygen decreases As temperature increases, dissolved oxygen decreases

11. SECCHI DISK/Forel Ule Used to estimate the transparency of seawater. Used to estimate the transparency of seawater. Can give a relative measure of productivity or turbidity. Can give a relative measure of productivity or turbidity. Forel Ule

12. CURRENT CROSS Used to measure current speed and direction. Used to measure current speed and direction. Time from drop until line is out. Time from drop until line is out. Use compass to determine the direction. Use compass to determine the direction.

13. PLANKTON NET A fine mesh net. A fine mesh net. Collects small plant and animal plankton. Collects small plant and animal plankton. Typically towed behind or to the side of a vessel. Typically towed behind or to the side of a vessel.

14. BENTHIC GRAB SAMPLER Used to take samples from off the ocean floor. Used to take samples from off the ocean floor. Sediment, as well as any organisms on the substrate will be collected when it closes. Sediment, as well as any organisms on the substrate will be collected when it closes.

15. OTTER TRAWL Used to catch organisms living on the ocean floor and right above it. Used to catch organisms living on the ocean floor and right above it. Towed behind the vessel. Towed behind the vessel.