Use lower water pressure during hydraulic dredging
Overall effectiveness category No evidence found (no assessment)
Number of studies: 0
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Background information and definitions
Some species, such as bivalves, can be fished using hydraulic dredges (Moschino et al. 2003). Using a hydraulic dredge can negatively affect subtidal benthic invertebrates due to direct physical damage, and changes to the seabed structure and topography (Gilkinson et al. 2003). Using a lower water pressure may potentially result in less damage or stress to organisms and theseabed.
Moschino V., Deppieri M. & Marin M.G. (2003) Evaluation of shell damage to the clam Chamelea gallina captured by hydraulic dredging in the Northern Adriatic Sea. ICES Journal of Marine Science, 60, 393–401.
Gilkinson K.D., Fader G.B.J., Gordon Jr D.C., Charron R., McKeown D., Roddick D., Kenchington E.L.R., MacIsaac K., Bourbonnais C., Vass P. & Liu Q. (2003) Immediate and longer-term impacts of hydraulic clam dredging on an offshore sandy seabed: effects on physical habitat and processes of recovery. Continental Shelf Research, 23, 1315–1336.
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This Action forms part of the Action Synopsis:Subtidal Benthic Invertebrate Conservation