. "1" . . . . . "2020-03-09 19:18:14.0" . . . "SDN:L22::NETT0193" . "SDN:L22::NETT0193" . "SDN:L22::NETT0193" . "2020-03-09 19:18:14.0" . "Semi-Balloon Otter Trawl"@en . "accepted"@en . "OTSB" . "OTSB"@en . "A funnel-shaped net designed to trap organisms at its closed-end while being trawled along the seafloor. It is composed of a non-fixed wide mouth attached to the main wire and held open horizontally by an otter board at each side; a tickler chain is mounted across the lower edge of the net to keep it in contact with the ground, whereas a float fixed to the top of the net ensures its vertical spread. Typically, a semi-balloon otter trawl has a mouth size of approximately 2m x 8.5m; the net has a fine mash and it is mounted to a head rope of maximum 14m in length. This type of trawl is ideal for deep-water sampling of megafauna near the seafloor, mostly for conducting species diversity, abundance and biomass studies. The semi-balloon otter trawl is also known as OTSB, OTSB 14 and Marinovitch Trawl. Ref: Methods for the Study of Marine Benthos, fourth edition by WILEY Blackwell."@en . . . "1" . "false" .