Instrument: Midwater Trawl

Dataset: 
Instrument: 
Instrument Short Name: TrawlMid
(http://vocab.nerc.ac.uk/collection/L05/current/23/)
Instrument Description:

A mid-water or pelagic trawl is a net towed at a chosen depth in the water column to catch schooling fish such as herring and mackerel. Midwater trawl nets have very large front openings to herd schooling fish toward the back end where they become trapped in the narrow "broiler". The sides of the deployed net are spread horizontally with two large metal foils, called "doors," positioned in front of the net. As the trawler moves forward, the doors, and therefore the net, are forced outward, keeping the net open.
This instrument designation is used when specific make and model are not known.

PI supplied instrument name:
Dataset-specific description

a Krill trawl with a 38 m2 mouth area, and with a Multisampler unit attached to the rear end. The Multisampler unit has five nets mounted on a frame, similar to the MOCNESS, and is also remotely controlled. Also called a "Macroplankton Trawl".

Heino, M., Porteiro, F.M., Sutton, T.T., Falkenhaug, T., Godø, O.R., and Piatkowski, U. (2011) Catchability of pelagic trawls for sampling deep-living nekton in the mid-North Atlantic. ICES Journal of Marine Science 68, 377–389.

Krafft, B.A., Melle, W., Knutsen, T., Bagøien, E., Broms, C., Ellertsen, B., Siegel, V., (2010) Distribution and demography of Antarctic krill in the Southeast Atlantic sector of the Southern Ocean during the austral summer 2008. Polar Biology 33, 957–968.