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Published: 2009

Hope for rebuilding global fisheries


An international study published in the journal Science has found that curbs to prevent overfishing are aiding the recovery of some depleted marine ecosystems and fisheries.1

Marine ecosystems are showing signs of recovery from overfishing.
Marine ecosystems are showing signs of recovery from overfishing.
Credit: CSIRO

CSIRO’s Dr Beth Fulton was one of 19 researchers – led by scientists Dr Boris Worm of Dalhousie University, Canada, and Dr Ray Hilborn of the University of Washington – who found that previously overfished ecosystems were recovering in five of the 10 large marine ecosystems they investigated.

Dr Hilborn noted that while fisheries in parts of the US, Iceland and New Zealand were improving ‘there is still a long way to go – of all fish stocks that we examined, 63 per cent remained below target and still needed to be rebuilt’.

And Dr Worm commented that while there is still a troubling trend of increasing stock collapse across all regions, ‘this paper shows that our oceans are not a lost cause’.

‘The encouraging result is that the exploitation rate – the ultimate driver of depletion and collapse – is decreasing in half of the 10 systems we examined in detail,’ he added.

‘This means that management in those areas is setting the stage for ecological and economic recovery. It’s only a start but it gives me hope that we have the ability to bring overfishing under control.’

Dr Fulton used computer modelling to analyse ecosystem recovery in 31 fisheries worldwide, and 10 in detail – including Australia’s southern and eastern scalefish and shark fisheries – to determine the effect of management measures such as catch quotas, fishing closures, ocean zoning, selective fishing gear and community co-management.


1 Worm B et al. (2009) Rebuilding global fisheries. Science 325 (5940), 578–585, DOI: 10.1126/science.1173146.





Published: 2009

Northern water assessment informs development capacity

Helen Beringen

It either doesn’t rain or it pours up north. Such variability is one of the challenges identified in the first consistent, analytical water assessment of northern Australia released from CSIRO’s Water for a Healthy Country Flagship. The work is informing thinking about the development capacity of the region.

Regional coverage of the Northern Australia Sustainable Yields Project.
Regional coverage of the Northern Australia Sustainable Yields Project.
Credit: CSIRO

Rainfall and runoff variability are just two components of a comprehensive review of water resources for water policy decisions which form part of the assessments undertaken by the Northern Australia Sustainable Yields Project.

Released by Parliamentary Secretary for Water, Dr Mike Kelly, at the RiverSymposium in Brisbane on 21 September, the study resulted from a March 2008 agreement by Council of Australian Governments (COAG) to extend the CSIRO work on sustainable water yields and availability that had been completed in the catchments of the Murray-Darling Basin.

Dr Kelly said the research would be a valuable resource to inform decisions about the conservation and development of northern Australia’s water resources.

‘From Broome in Western Australia to Cairns in Queensland, the Northern Australia Sustainable Yields (NASY) reports provide important information on current and likely future water availability in northern Australia,’ he said.

Despite popular perceptions that northern Australia has a surplus of water, the research found the extremely seasonal climate with continuously high temperatures meant that the landscape was annually water-limited, with little or no rain for three to six months every year, and very high potential evapotranspiration rates.

‘Northern Australia experiences high rainfall during the wet season, with most falling near the coast and with year to year amounts that are highly variable,’ said project leader Dr Richard Cresswell.

‘Runoff follows a similar pattern to rainfall, with most surface flow approaching the estuaries, with potential inland dam sites receiving less and quite variable amounts of water and suffering very high evaporation rates.

‘The very few river reaches that flow year-round are mostly sustained by localised groundwater discharge and have high cultural, social, ecological and developmental value,’ he said.

‘Groundwater may offer potential for increased extractions for development, though the highly dynamic nature of shallow aquifers, which rapidly fill during the wet season and drain through the dry season, means there is little opportunity to increase this groundwater storage and careful management is required where these groundwaters also provide sources for the few perennial rivers.’

Dr Cresswell said future climate predictions for the north suggest that evapotranspiration was likely to increase while rainfall was likely to be similar to historical levels, which were lower than the last decade, particularly in the west.

Speaking to ABC Rural, Joe Ross, Chair of the federal government’s Northern Australia Land and Water Taskforce (charged with finding new development opportunities in Northern Australia), said the CSIRO report confirmed that expectations for food production in the north have been ‘over the top’, and that there would be limited opportunity for broad-scale agriculture in the tropics.

The Taskforce’s submission to the government later this year will take into account the central findings of the CSIRO teams’ work. ‘It covers not only the amounts of water in northern Australia, but also what impact there’ll be on the livelihoods of the community of northern Australia, in particular, one of the main constituents being Indigenous Australians,’ Mr Ross said.

The Northern Australia Sustainable Yields Project is part of the Australian Government’s Northern Australia Water Futures Assessment (NAWFA), a five-year program to develop an enduring knowledge base to inform decisions about conservation and development of northern Australia’s water resources, so that any development proceeds in an ecologically, culturally and economically sustainable manner.


More information:

Dr Richard Cresswell: Richard.cresswell@csiro.au







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