Dredge fishing definition9/23/2023 ![]() (1998) Effects of experimental otter trawling on surficial sediment properties of a sandy‐bottom ecosystem on the Grand Banks of Newfoundland. Schwinghamer P., Gordon Jr D.C., Rowell T.W., Prena J., McKeown D.L., Sonnichsen G. ![]() Marine Environmental Research, 73, 85–95. ![]() (2012) The environmental impacts of three different queen scallop ( Aequipecten opercularis) fishing gears. Marine Ecology Progress Series, 134, 131–150. (1996) Effects of scallop dredging on a soft sediment community: a large-scale experimental study. Evidence for other interventions related to using different fishing gear is summarised under “Threat: Biological resource use”.Ĭurrie D.R. Evidence for using other fishing gear instead of an otter trawl is summarised under “Threat: Biological resource use – Use an otter trawl instead of a beam trawl”. Using an otter trawl instead of a dredge may potentially lessen the negative impact on subtidal benthic invertebrates (Hinz et al. Although otter boards can damage the seabed, they may cause less damage than a dredge due to the limited surface area in contact with the seabed in comparison to a dredge. Otter trawls have a pair of boards or metal plates (otter boards) which attach to the sides of the net and keep the net open as it is pulled through the water (Schwinghamer et al. Dredging, for instance for bivalves, normally involves towing a heavy steel frame along the seabed, which negatively impacts subtidal benthic invertebrates due to direct physical damage and the retention of unwanted invertebrate catch, and indirectly by changes to the seabed structure and topography, such as creating dredge tracks (Currie & Parry 1996).
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