BCO-DMO BlogInstrument: MOCNESS
The Multiple Opening/Closing Net and Environmental Sensing System or MOCNESS is a family of net systems based on the Tucker Trawl principle. There are currently 8 different sizes of MOCNESS in existence which are designed for capture of different size ranges of zooplankton and micro-nekton Each system is designated according to the size of the net mouth opening and in two cases, the number of nets it carries. The original MOCNESS (Wiebe et al, 1976) was a redesigned and improved version of a system described by Frost and McCrone (1974).(from MOCNESS manual) This designation is used when the specific type of MOCNESS (number and size of nets) was not specified by the contributing investigator.
Samples were collected using a 1-m2 MOCNESS net with 202-micron-mesh nets, pressure sensor and flowmeter. Tow speed was generally 0.5-1 m sec-1. Only those samples from selected net openings were analyzed and only data from those analyses are provided. In general, for each MOCNESS deployment, samples from 3-5 nets opened and closed sequentially from the lowest depth (zl, m) to the shallowest, or upper, depth (zu, m) were analyzed
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