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Ref No. [UMCES[CBL 11-020
13
Appendix A: Additional Comments and Interpretation
A.1. Zooplankton > 50 µm
Data provided by MERC
This data is provided solely to frame the overall zooplankton community on testing days.
Since the test filter system challenge water was always pre filtered (35 µm, 50-µm diagonal
measure pore-size), the greater-than-50-µm size class was removed; thus, is not considered a
challenge condition to the test filter system.
Size Class 1
Size Class 2
Total
>50µm to <250µm
>250-µm
>50-µm
Date
Test #
(#/m3)
(#/m3)
(#/m3)
13-Jan-11 Tests 3, 4
42,250
8,188
50,438
19-Jan-11 Tests 1, 2, 5
99,000
10,750
109,750
20-Jan-11 Tests 6
155,800
11,750
167,550
Size-class distinctions or measures are determined by considering the greatest available
measure among the x, y, and z body axis, exclusive of appendages such as legs, swimming
appendages, sensory apparatus, or other fine appendages. Most of the smaller organisms were
rotifers or nauplii of copepods. The larger organisms were calanoid copepods.