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Putting potential environmental risk of Australia's trawl fisheries in landscape perspective: exposure of seabed assemblages to trawling, and inclusion in closures and reserves. FRDC Project No 2016-039

Citation

Pitcher, R and Rochester, W and Dunning, M and Broadhurst, M and Noell, C and Tanner, J and Kangas, M and Newman, S and Semmens, J and Rigby, C and Saunders, T and Martin, J and Lussier, B, Putting potential environmental risk of Australia's trawl fisheries in landscape perspective: exposure of seabed assemblages to trawling, and inclusion in closures and reserves. FRDC Project No 2016-039, Fisheries Research and Development Corporation, Brisbane, Australia, No 2016‐039, pp. 1-62. (2019) [Government or Industry Research]


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Abstract

This project implemented the first national spatial approach to quantifying the exposure of mapped seabed assemblages to the footprints of all demersal trawl fisheries that operate on the mainland continental shelf and slope of Australia, as well as their spatial protection in areas permanently closed to trawling. These outputs will assist understanding of the potential risk to demersal assemblages from exposure to trawling footprints and of the contributions of existing spatial management measures to environmental sustainability, and with identifying and prioritising future needs for addressing risks to habitats. The focus provided by this prioritization is intended to reduce the costs of environmental assessments, and ultimately facilitate outcomes including reduction of the ecological risks posed by trawling and improved environmental sustainability. Trawling footprints were mapped from fishery effort data for recent years. Protection provided by current spatial management included all permanent trawl‐fishery closures, the Commonwealth Marine Reserve system (CMRs) and State Marine Protected Areas (MPAs). Seabed assemblages - as surrogates for broad habitats - were defined and mapped using a single consistent method that has been enabled by recent advances in analysis methods and the availability of new data and knowledge. The overlaps of each assemblage with trawl footprints, and with areas closed to trawling, were calculated to quantify trawl exposure and spatial protection.

Item Details

Item Type:Government or Industry Research
Keywords:ERA, ecological risk assessment, bottom trawling, effects of trawling, trawl impacts, seafloor damage, trawl footprints, seabed assemblages mapping, ecoregions, marine protected areas, marine parks
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquatic Ecosystem Studies and Stock Assessment
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management of Marine Environments
UTAS Author:Semmens, J (Professor Jayson Semmens)
ID Code:132707
Year Published:2019 (online first 2018)
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2019-05-17
Last Modified:2019-05-21
Downloads:0

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