OC 201e – Introduction to Oceanography1 of 3Lab 4 – Zooplankton: Diel Vertical Migration & MorphologiesPart 1: Diel Vertical Migration (DVM)On a separate sheet of paper answer the following questions:1) What are the X and Y axes in Figures 2 through 5? What are the units? (2 pts)(HINT – for this question you will need to google UTC)Y axis= Depth (m) metersX axis= Time (UTC) universal time co
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OC 201e – Introduction to Oceanography
1 of 3
Lab 4 – Zooplankton: Diel Vertical Migration & Morphologies
Part 1: Diel Vertical Migration (DVM)
On a separate sheet of paper answer the following questions:
1) What are the X and Y axes in Figures 2 through 5? What are the units? (2 pts)
(HINT – for this question you will need to google UTC)
Y axis= Depth (m) meters
X axis= Time (UTC) universal time coordinated
2) What do the colors denote? What is the range of values depicted? What do you think the
colors represent? (3 pts)
The colors denote the acoustic signals being reflected and its intensity, it is the highest at
red and lowest at blue. The units represented are dB = Decibel.
3) What is the general pattern shown by all of the figures? (1 pt)
The biggest pattern I see is that the zooplanktons are reflected from near the surface of
the water during the night and during the day they are deflected from the bottom of the
ocean, the depth from where the zooplanktons are reflected from increases during
daylight and decreases during the night.
4) How does the pattern differ throughout the year? To provide some data to discuss this
question, make a Table that has 4 columns labeled: Date, Ascent time, Descent time,
& Strength at surface. The 4 rows are the dates: Jan, Apr, Jul, Oct. Paste the table
here. Fill in the table using the data in Figures
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