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Pelorus Sound

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    The Marlborough District council is developing the second generation of its resource management plan for the Pelorus Sounds area. This includes, amongst other things, the identification and protection of significant marine biological sites, and the development of marine farming provisions. Pelorus Sound is a key location for both significant sites and activities This project provides a historic context for understanding how the Pelorus has changed, and will assist in the development of environmental outcomes for seabed habitats of planning provision. This project uses the Compound Specific Stable Isotope (CSSI) method developed by NIWA scientist, Max Gibbs, that can identify and apportion, by land use on a catchment scale, the sources of soil contributing to the sediment at a location of an estuary (Gibbs 2008).

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    Aquaculture Direct engaged NIWA to complete a benthic survey and ecological assessment as part of a coastal permit application for an extension to marine farm 8203, near Camel Point, at the entrance to Tennyson Inlet, Pelorus Sound. This assessment comprised side-scan-sonar swath mapping of sites to characterise seabed topography, photo-quadrats of the seabed to ground-truth the side-scans and sled samples. The report indicated that the proposed extension is not expected to cause any significant adverse ecological effects. The ecological effects of farming the proposed additional mollusc species are likely to be no greater than the effects of farming green mussels. Farming of the algal species (as proposed) is unlikely to have any significant ecological effects. Work was completed during May-July 2014.