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sediment

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  • This report presents data from analyses of seabed sediment samples collected during two Ocean Survey 20/20 voyages to the Chatham Rise and Challenger Plateau in 2007 (TAN0705 and TAN0707, respectively). Sediment samples were collected by multicorer and by pipe dredges attached to the epibenthic sled and beam trawl. Sediment grain-size, composition, microbial abundance and biomass analyses were carried out under Ministry of Fisheries project ZBD2007-01, with input from earlier OS 20/20 projects.

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    A proposed 5-yearly benthic monitoring plan was developed to satisfy the resource consent conditions for RM100973, that covers the thirteen 4 ha spat farms within subzone A, AMA1, in Golden Bay (Grange 2011). Subsequently, the Tasman District Council has modified the consent conditions for the 8 “consented” marine farms and is reviewing the 12 “Collingwood” farms in the same block. Accordingly, it seems sensible to combine the monitoring protocols and timing of surveys and reporting for all farms in the entire subzone. This short report is designed to confirm the approach detailed by Grange (2011), but to modify the sampling to cover the entire subzone A, not just the 13 spat sites. This report should be read in conjunction with Grange (2011), a copy of which is appended, to avoid repetition. (Grange, K.R. 2011. Monitoring programme, Golden Bay spat farms. NIWA Client Report NEL2011-016, prepared for Golden Bay Marine Farmers’ Consortium.10 p.) The monitoring plan includes a range of methods, including side-scan sonar, grabs, and drop camera/video images, and assessment of specified macro-invertebrates.