Meaning Demersal otter trawl
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Demersal otter trawlA type of bottom trawl with rectangular 'doors' or 'otterboards' to keep the mouth of the cone-shaped net open horizontally while the net is being towed. A vertical opening is maintained by weights on the bottom and floats on the top. The net is dragged along the sea bed with the aid of bobbins, rollers and ‘rockhoppers’, which [..]
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