Lucieer, V and Pender, A, An environmental assessment of a proposed marine farming zone extension at Flathead Bay, in the D'Entrecasteaux Channel, Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS (2014) [Contract Report]
Environmental data on substrate type, habitat distribution, bathymetry, and benthic flora and fauna were assessed. Within the proposed zone the substrate was characterized by silt and silty sand. The bathymetry ranged from -17.1 m to -45.9 m and was characterized by a gradual slope from the shoreline to the east with two shallower regions, one in the north east and one on the southern boundary.
The silty sand substrate was brown to yellow in colour with shell grit, evidence of active bioturbation; live and dead New Zealand screwshells (Maoriculpus roseus), brittle stars, squat lobsters (Munida haswelli) and polychaete worms were common across the whole site. Other features on the substrate included drift algae (Ecklonia radiate) and (Phyllospora comosa), Northern Pacific sea stars (Asterias amurensis), gobys (potentially Nesogobius sp.), zoanthids (potentially Parazoanthus sp.) and a Tasmanian numbfish (Narcine tasmaniensis).
One notable feature that was identified from the hill-shaded bathymetric image was "pock marks" occurring in the soft sediment on the western boundary of the zone assessment area. The six pock marks that appear on the eastern boundary, inside the zone assessment area were around 20 m in diameter and 1- 2 m deep and occurred in the basins and not on the terraces.
|Item Type:||Contract Report|
|Research Division:||Biological Sciences|
|Research Field:||Marine and Estuarine Ecology (incl. Marine Ichthyology)|
|Objective Group:||Ecosystem Assessment and Management|
|Objective Field:||Ecosystem Assessment and Management of Marine Environments|
|Author:||Lucieer, V (Dr Vanessa Lucieer)|
|Author:||Pender, A (Mr Andrew Pender)|
|Deposited By:||IMAS Research and Education Centre|
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