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Title: Mocness  
Author: World Heritage Encyclopedia
Language: English
Subject: Ichthyoplankton, Plankton, Video plankton recorder, NOAAS Bell M. Shimada (R 227), NOAAS Henry B. Bigelow (R 225)
Collection: Planktology
Publisher: World Heritage Encyclopedia


MOCNESS is the acronym for Multiple Opening/Closing Net and Environmental Sensing System and is a net system for plankton in the ocean. The system is towed behind a research vessel with a speed of 1.5 knots and consists of five to twenty nets with a mesh size from 64 µm to 3 mm and an area of 1 to 10 sqm which are opened and closed computer controlled at desired depth. The net enables biologists to catch zooplankton and nekton in various depth horizons typically anywhere in the upper 500 m of the oceans. All MOCNESS systems are capable of sampling to 6000 meters depth (10,000 psi). The system includes a SeaBird CTD-probe to measure salinity and temperature at sampling depths, as well as optional dissolved oxygen, PAR (photosynthetically available light), transmissometry and fluorescence sensors.


P. H. Wiebe et al., 1985, New development in the MOCNESS, an apparatus for sampling zooplankton and micronekton, Marine Biology, 87(3), 313-323, doi:10.1007/BF00397811

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