accepted
false
An instrument designed for the collection of benthic organisms and bottom material on a variety of grounds. It consists of a rectangular dredge frame, two dredge arms and a triangular mesh net, usually about half as deep as it is wide. The dredge frame varies in length, depending on the size of the towing vessel: 300-380 mm for small boats; 450-600 mm for larger boats; and 750-1300 mm for trawlers. Typically, one dredge arm is attached directly to the tow rope, while the other is attached by a weak link, such as twine, to release the dredge should it become stuck on the seabed. The collection net may be lined with an inner bag of non-impervious material for the collection of sediment.
Unspecified naturalists {rectangular} dredge
SDN:L22::NETT0190
2019-12-02 09:02:24.0
SDN:L22::NETT0190
2019-12-02 09:02:24.0
1
SDN:L22::NETT0190
Natlst dredge
Natlst dredge
1