Marine Disturbance in Parts of the Australian Exclusive Economic Zone

Australia: State of the Environment Second Technical Paper Series (Coasts and Oceans), Series 2
David Barratt, John Garvey and Jean Chesson
Bureau of Resource Sciences, Australia
Department of the Environment and Heritage, 2001
ISBN 0 6425 4745 9

List of Tables

Table 1.1 Agreed levels of implementation for each indicator
Table 3.1 Quantitative components of Indicators 3 and 4 and the fisheries selected to illustrate these components in space and time.
Table 3.2 Criteria used to rate logbooks and returns to provide data for GIS analysis
Table 4.1 Components of Fishing "Catches"
Table 4.2 Catch data availability for Commonwealth managed fisheries
Table 4.3 Summary of bycatch information in Commonwealth fisheries.
Table 4.4 Distribution of discard rates (estimated discarded catch as a percentage of total catch) across the 144 Australian commercial fisheries.
Table 4.5 Classification of species into target and "non-target" for each major family group represented in the South East Trawl Fishery. "Non-target" species considered targets by fishers are from onboard observer records.
Table 4.6 Catch rates of "non-target" species recorded by the Scientific Monitoring Program (SMP) between 1993 and 1995 and the annual "non-target" catch of the fishery as a result of scaling to the annual fishery effort. (Source: Harris and Ward 1999).
Table 4.7 The proportion of target and "non-target" species in major animal groups and the catch rates of these groups in the sub-component fisheries. Data of 1886 shots from SMP 1993-95. T - targeted species within our designated "non-target" group.
Table 4.8 The percentage composition of the 20 most abundant fish families in the "non-target" catch of the Northern Territory sector with an estimate of the catch in tonnes in 1988. From Pender et al. 1992
Table 4.9 The percentage composition of the 20 most abundant fish families in the "non-target" catch of the southern Gulf of Carpentaria in 1983. Analysis of biomass data from Poiner and Harris 1986
Table 4.10 Retained catch (kg) of "non-target" species by State sector, averaged for 1995 -1996 (From Sachse and Robins 1996, 1997)
Table 5.1 Summary of fisheries legislation and management plans in Australia
Table 6.1 Logbooks and catch and effort forms that collect information on longline, dropline, gillnet and meshing fishing effort.
Table 6.2 The number of logbooks and forms that meet spatial, temporal and effort criteria required for effective mapping of each fishing method as an indicator of marine disturbance.
Table 6.3 Numbers of hooks set per year in the eastern sector of the Australian Pelagic Longline Fishery by pelagic zone.
Table 6.4 Numbers of Danish seine shots in the South East Fishery between 1989 and 1998 by IMCRA region.
Table 6.5 Recommended sub-indicators for Indicator 3
Table 6.6 Recommended minimum data requirements for spatial analysis of fishing effort
Table 7.1 Logbooks and catch and effort forms that collect information on trawling and dredging effort.
Table 7.2 Area trawled (km²) in the Northern Prawn Trawl Fishery between 1989 and 1998 by IMCRA region.
Table 7.3 Kilometres trawled in the South East Trawl Fishery between 1989 and 1998 by IMCRA region.
Table 7.4 Recommended sub-indicators for Indicator
Table 7.5 Recommended minimum data for spatial analysis of fishing effort

List of Figures

Figure 3.1 The approximate extent of GIS analyses and maps generated as part of the fisheries case studies illustrating Indicators 3 and 4
Figure 4.1 Location of South East Fishery statistical zones (modified from Tilzey 1994)
Figure 4.2 Total catch (discarded plus retained) by quarter for the Western Zone of the South East Fishery estimated from discard data obtained by the Scientific Monitoring Program. The error bar is the standard deviation of the estimate.
Figure 4.3. The location of fur seal catches in the South East Trawl Fishery for zones other than New South Wales. Location information of New South Wales catches not accessible. Source: SMP database. Extracted by John Garvey, BRS.
Figure 5.1 The proportion of fisheries in each state that have management plans and bycatch monitoring indicators.
Figure 6.1 Change in fishing effort (hooks) in the eastern sector of the Australian Pelagic Longline Fishery and the area of the fishery (n miles²) between 1989 and 1998.
Figure 6.2 Fishing intensity (hooks per 10 n miles²) by pelagic zone in the eastern sector of the Australian Pelagic Longline Fishery between 1989 and 1998.
Figure 6.3 Change in fishing effort (shots) in the South East Danish Seine Fishery and the area of the fishery (n miles²) between 1989 and 1998.
Figure 6.4 Danish seining intensity (shots per 10 n miles²) by IMCRA region for the South East Fishery between 1989 and 1998.
Figure 7.1 Total length of offshore seismic survey tracks (2-D and 3-D combined)
Figure 7.2 Number of seismic surveys (2-D and 3-D combined) per year in the Twofold Shelf Region, South-east Victoria.
Figure 7.3 Number and length of 3-D seismic surveys per year in the Twofold Shelf and Otway IMCRA regions.
Figure 7.4 The number and length of wells in Australian waters (1989 - 1999)
Figure 7.5. Number of active offshore rigs (1995 - 1999).
Figure 7.6 Change in trawling effort (km²) in the Northern Prawn Trawl Fishery and the area of the fishery (km²) between 1989 and 1998.
Figure 7.7 Trawling intensity (km² trawled per 6" grid) by IMCRA region in the Northern Prawn Trawl Fishery between 1989 and 1998.
Figure 7.8 Change in trawling effort (km) in the South East Trawl Fishery and the area of the fishery (n miles²) between 1989 and 1998.
Figure 7.9 Trawling intensity (km/n miles²) by IMCRA region in the South East Trawl Fishery between 1989 and 1998.
Figure 8.1 Two approaches to deriving national indicators. In Approach 1, compatible data from each reporting unit is combined and then the indicator is assessed against a national objective. In Approach 2, possibly different data are assessed within each reporting unit and the national indicator provides a summary of the results.

State of the Environment

2001

Environment home

SoE themes

Marine Disturbance in Parts of the Australian Exclusive Economic Zone

List of Tables

List of Figures