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Table 5.14. Effects of hydraulic clam dredges on mud substrate habitat: summary of published studies. (S = statistically significant; citations in bold print are peer-reviewed publications.)

Reference Location Depth Sediment Effects Recovery Approach
Hall and Harding 1997 Auchencairn Bay, Solway Firth, Scotland Intertidal Mud Dredge tracks; S reductions in number of infaunal species and individuals persisted for 4 wk; 3 of 5 dominant species reduced in abundance throughout experiment (8 wk). Nearly complete recovery of infaunal community after 8 wk, but some effects remained; dredge tracks not seen after first day. Experimental study of the effects of single suction dredge passes in a commercially harvested area; recovery monitored 1, 4, and 8 wk after dredging.

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