Concept
Semi-Balloon Otter Trawl
| URI | http://vocab.nerc.ac.uk/collection/L22/current/NETT0193/1/ | ||
|---|---|---|---|
| Within Vocab | SeaVoX Device Catalogue | ||
| Alternative Labels | OTSB | ||
| Definition | 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. | ||
| Date | 2020-03-09T19:18:14 | ||
| Identifier | SDN:L22::NETT0193 | ||
| Note | accepted | ||
| Is Version Of | NETT0193 | ||
| version | 1 | ||
| Broader | L05:61 |
demersal trawl nets | |
L19:SDNKG17 |
sensor_model | ||
| Narrower | L22:NETT0194 |
Semi-Balloon Otter Trawl (14 m headrope; single-warp operation) - Merrett and Marshall (1980) | |
| Related | L35:MAN0002 |
Unknown | |
B75:UNSPEC |
Unspecified | ||
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