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mcbem-2014-01-submission-wwf-en

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Killer whales. © forwhales.org<br />

Acoustic Monitoring<br />

Recomm<strong>en</strong>dation 5: Noise monitoring should be expanded off the coast of BC.<br />

Noise levels should be monitored (using calibrated hydrophone systems) in repres<strong>en</strong>tative areas<br />

coast-wide, recognizing that underwater sound transmission varies with depth, bathymetry, etc.<br />

Underwater noise data or modelled results should be a layer in the spatial data sets used by<br />

planners and managers, and modelled noise levels should be validated with measurem<strong>en</strong>ts.<br />

Ambi<strong>en</strong>t baselines should be established for key areas, based on existing data collected during<br />

various <strong>en</strong>vironm<strong>en</strong>tal assessm<strong>en</strong>ts and multiple research initiatives (DFO, Ocean Initiatives,<br />

port developm<strong>en</strong>ts, etc.).<br />

Noise measuring stations should be linked to the AIS system to monitor source levels from<br />

individual vessels and id<strong>en</strong>tify the noisiest vessels in differ<strong>en</strong>t ship classes. This could be a useful<br />

means of noise reduction around shipping lanes, as noise reduction measures could initially be<br />

targeted at these vessels. Since such noise reduction in part requires improved maint<strong>en</strong>ance,<br />

vessel-specific noise reductions would affect their areas of operation, rather than just being<br />

local in effect (as would be the case with managing through slow-down requirem<strong>en</strong>ts).<br />

Acoustic Quieting and Marine Protected Areas<br />

Recomm<strong>en</strong>dation 6: A quiet<strong>en</strong>ed or quiet area, such as within an existing or proposed MPA in BC,<br />

should be designated in Canada’s Pacific.<br />

The need to establish a framework for determining approaches to id<strong>en</strong>tify areas for quiet<strong>en</strong>ing was<br />

id<strong>en</strong>tified. In g<strong>en</strong>eral, managem<strong>en</strong>t of underwater noise in BC could be framed around the need to<br />

protect critical habitat for one or more whale species on Canada’s Pacific Coast, with SARA-designated<br />

critical habitat (or candidate or proposed habitat) being an initial subset of habitats for consideration for<br />

acoustic protection. Marine protected areas offer promise as an underwater noise solution in some<br />

situations. This tool is not being used to its fullest. A review by Erich Hoyt (this workshop’s keynote<br />

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