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Table 2

Table 2: Variables and methods for environmental surveys and monitoring (Source: modified from Gavine and McKinnon 2002).

Attribute	Variable		Method	Baseline survey^(a)	Monitoring requirements and triggers^(b)
Attribute	Variable		Method	Baseline survey^(a)	Active feeding	No active feeding
Bathymetry	Depth Contours		Soundings	X	X	X
Hydrography	Currents Tides Waves		Model/in situ meter Model/database Model/database	X X X	X X X	X X X
Sediment	Chemistry Physical Biological	ORP C, N Stable isotopes Particle size Visual Infauna	Redox Mass spectrometry Sediment core, PSA Sediment core, video Grab sample	✔ ✔ ✔ ✔ ✔	Annually	Beggiatoa sp. mats and or organic accumulation and or debris present beneath culture infrastructure, and or at compliance point on video transect.
Sea Bed	Habitat Substrate	Structural/ vegetation Visual	Sounder/video Diver observation Video/diver observation	✔ ✔ ✔	X X Annually	X X Annually
Water Column	Key water quality variables	Temp/DO/ Salinity profile Nutrients Chlorophyll a	Standard methods Standard methods Standard methods	X X X	Evidence of algal blooms, eutrophication	X X X

✔ - required

X - not required

(a) To be completed by the Crown lease holder
(b) To be completed by the aquaculture licence holder