Application 124771 - Ministry of Fisheries

More documents

Recommendations

Info

CAWTHRON INSTITUTE | REPORT NO. 2134 MAY 2012 5. RESULTS 5.1. Sediment physical and chemical properties Sediments sampled from within the eight reference farms and six control sites contained varying amounts of silt and clay (< 63 µm), sand (< 2 mm and > 63 µm) and gravel-sized (> 2 mm) components (Figure 4, see Appendix 2 for raw data). No clear patterns in sediment particle grain-size components relating to area (north or south of Coromandel Harbour) or site type (‘control’ versus ‘farm’) were evident. The majority of sites within the region had only small gravel components, and only four sites had an average gravel component of 20% or more (Control sites 1 and 4 and Farm sites 1 and 6). A different suite of sites had sand components greater than 30% of their total dry weight (Control sites 2 and 4 and Farm sites 2, 6 and 7), and it was these same sites that had silt components that were less than 50% of their total dry weight. At all other sites, the majority of the sediments (> 50%) were comprised of fine muddy silts (< 63 um). Observations made from video footage (see Section 5.4), were consistent with these results, where fine silt/mud was the most common substratum, even at control sites. Sand/shell dominated substrata were only observed at a small number of control and farm sites. Sediment cores at the majority of reference farm and control sites were characterised by a fairly uniform light grey/brown colour and appeared well oxygenated, with poorly defined aRPD layers that ranged between 40 and 60 mm below the seafloor (see Appendix 2 for images). No sulphide odours were detected. Total nitrogen (TN) was significantly higher in sediments collected from under farms than at control sites (site type, F1, 38 = 7.98, p
MAY 2012 REPORT NO. 2134 | CAWTHRON INSTITUTE Figure 4. Average sediment grain-size (percentage of dry weight), total nitrogen (TN, mg kg -1 dry weight) and total organic carbon (TOC, percentage of dry weight) for control and farm sites to the north and south of Coromandel Harbour. 10
Page 1 and 2: Waikato Regional Council Private Ba
Page 3: REPORT NO. 2134 ASSESSMENT OF BENTH
Page 6 and 7: MAY 2012 REPORT NO. 2134 | CAWTHRON
Page 8 and 9: CAWTHRON INSTITUTE | REPORT NO. 213
Page 66 and 67: To: Waikato Regional Council Privat
Page 68 and 69:
Contents 2 Contents ...............
Page 70 and 71:
4 marine farm (which expires on 1 J
Page 72 and 73:
6 2011) identified that the aquacul
Page 74 and 75:
8 Goodwin E, 2012. Assessment of Be
Page 76 and 77:
10 4.5.8 The capacity of the wharf
Page 78 and 79:
12 in Appendix 1 and designed in ac
Page 80 and 81:
7. Relevant Planning Provisions 14
Page 82 and 83:
16 the applicant is a member of the
Page 84 and 85:
7.18 Policy 6.1.3 - (Integrated Man
Page 86:
Appendix 1: Survey plan showing loc
Page 89:
REPORT NO. 2167 COROMANDEL MUSSEL F
Page 93 and 94:
CAWTHRON INSTITUTE | REPORT NO. 216
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
show all

Application 124771 - Ministry of Fisheries

Create successful ePaper yourself

Delete template?

Save as template?