NMFS Office of Science & Technology   |   Marine Ecosystems Division
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Sampling and Processing Summary
"Zooplankton was collected by small, quantitative plankton samplers of the type described by Clarke and Bumpus (1940), which contain current meters to measre the volume of water strained."

Zooplankton were collected via oblique tows at approximately 2 knots for a half hour period, using nets of no. 10 silk (158 micrometers?). Usually two samplers were used at the same time, one with 0 to 400 m of wire out, the other with 400 to 800 meters of wire out. (The deeper net occasionally failed and was not used "near shore".)

Sampling Gear Net Mesh Tow Method
( depth range )
# of Tow
% of all Tows
Clarke-Bumpus Sampler 158 um oblique
down-to ~500 m
13 100.0 %
Sub-Collection:   Riley & Gorgy 1947 COPEPOD
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