Tactical Research Fund: Extension of fisheries research and development funded research results on improved bycatch reduction devices to the Queensland East Coast Otter Trawl Fishery
A unique opportunity exists to capture the results of the recent FRDC funded research project “Reducing the impact of Queensland's trawl fisheries on protected sea snakes (Project No. 2005/053)”, and fast track adoption of these results by the Queensland East Coast Otter Trawl Fishery (ECOTF). The project results estimate the capture of approximately 100,000 sea snakes annually within the ECOTF. The red-spot king prawn sector of the fishery, which is a reef-associated prawn fishery, accounted for about 59% of all sea snake catches and 85% of mortalities. Fisheye Bycatch Reduction Devices (BRD) were shown to reduce sea snake capture by around 62%. Adoption of these devices, including appropriate installation and maintenance, within the red-spot king prawn sector of the ECOTF alone would result in a significant reduction in trawl fishery induced sea snake mortality in Queensland, and the Great Barrier Reef Marine Park. The fisheye BRD was also equivalent to the Square Mesh Codend (SMC) BRD as the most effective devices to reduce bycatch tested in the project. The main difference between the two being that the fisheye is better at excluding large thick snakes than the SMC. These results offer an outstanding opportunity for the trawl fishing industry to significantly reduce an identified ecological impact.
The project also extends the results of the FRDC funded research project “A collaborative extension program by the Queensland Department of Primary Industries & Fisheries, SeaNet and Ecofish for the development and adoption of square mesh codends in select prawn and scallop trawl fisheries in Queensland (Project 2005/054)”.
This work would align with the outcomes of the DEWHA assessment of the ECOTF for the purposes of accreditation under Parts 13 (protected species) and 13A (export approval) of the EPBC Act 1999.
Final report
Tactical Research Fund: New South Wales Angler Access Forum & Workshop
Need for a workshop
In recent times recreational anglers have experienced a combination of circumstances that have been eroding, or threatening to erode, their overall access to this which is one of the most highly sought after recreational pursuits in Australia. Without evidence to suggest any order of priority, these circumstances generally can best be summed up as resulting from the likes of the following events:-
Marine Parks and National Parks restrictions
Water Authorities
Lands Department
Proposed Government sales
Primary producers denial to accessing streams, rivers and impoundments
Environmental group representations on threatened species or those under threat
Industrial pollution causing no-go or restricted fishing areas
Environmental impacts, and
High levels of water extraction by irrigators, mining organisations,
The NSW population participating in fishing appears to have dropped alarmingly from 30% to 20% of the total population, the 2003 National Recreational and Indigenous Fishing Survey produced figures estimating 3.36 million Australians fished annually in 2000, with 30% being in NSW.
The national total recreational boat ownership was then listed as 925,466, with again the largest number of 307,813 being in NSW. In addition, overseas tourists who fished in Australia totaled just fewer than 200,000 in 2001.
To demonstrate the economic significance of recreational fishing the 2003 Survey stated the expenditure attributable to recreational fishing as being $1,85M for 2001, $554.2M being in NSW.
With this much at stake in terms of investment and participation, there is clearly a need to address issues.
Access is identified as a national priority for research and investment by Recfishing Research (a joint initiative of Recfish Australia and FRDC) as well as other peak representative organisation R&D strategies including VRFish (Victoria's peak recreational fishing body).
Final report
Tactical Research Fund: Evaluating source-sink relationships of the Western Rock Lobster fishery using oceanographic modelling
The puerulus settlement in 2007/08 was the second lowest in 40 years and follows several years of below-average settlements. Previous studies have shown that environment factors such as the Leeuwin Current and storms affect the abundance and spatial distribution of puerulus settlement. However it is important to identify if there are some changes to these environmental factors contributing to the low recruitment. Initial monitoring indicates very low 2008/09 settlement despite the Leeuwin Current being above average this year. This event is unexpected based on previous settlements during years of strong Leeuwin Current and has serious implications for the management of the fishery. The breeding stock overall is believed to be within historic ranges and so is not expected to have contributed to the recent decline in settlement. However it is possible that the breeding stock in certain parts of the fishery may be more critical than others and this could have changed over the years due to climate change effects.
Advances in quality of satellite data in the 1990s measuring sea surface topography (altimeter satellites) have enabled significant improvements in our understanding of the environmental factors, with the assistance of oceanographic modelling. Previous oceanographic models were focussed on the open ocean circulation off the continental shelf. Recent advances enable the development of high-resolution models at 10 km spatial scale which resolve the dominant processes on the shelf. Understanding the causes of recruitment variability and their long-term trends has important implications in the stock assessment and management of the fishery. The management response would be significantly different if the cause of the series of low recruitment was due to egg production or environmental factors. An adjustment to the sustainable harvest rate may be required if there are long-term environmental trends that affect the average recruitment of the western rock lobster.
Final report
Tactical Research Fund: Assessing possible environmental causes behind the reduced colonisation of Western Rock Lobster puerulus collectors by a wide suite of species
WRL puerulus settlement has been unexpectedly low over the past two settlement periods, with the most recent settlement period (2008/09) being the lowest on record. This extremely weak settlement has occurred despite environmental conditions being favourable for an above average settlement (i.e. a strong Leeuwin Current, warm sea temperatures and la Nina like conditions).
The recent poor settlements could be attributed to a number of possible scenarios, including, reduced egg production from depleted brood stock or a shift/change in oceanic conditions possibly due to climate change. Understanding what scenario(s) are responsible will be crucial for the effective conservation and management of the WRL stock, and ultimately the longevity of the fishery. Anecdotal evidence suggests that colonisation of the puerulus collectors by a number of other species commonly found during processing of these collectors have also been extremely low in recent times. Beginning to examine of the marine flora and fauna communities colonising the puerulus collectors over a range of 1200 km during this time of extremely low settlement (i.e. prior to the end of the settlement season in April 2009) and determining how these communities vary in relation to the varied environmental conditions experienced, will provide valuable information as to what may be influencing puerulus settlement. If settlement of other marine flora and fauna show a related response to that of the WRL pueruli, it could indicate environmental change may be responsible for the decreased settlement. This data will complement other research, such as the oceanographic modelling application (JM010) submitted by DoF and is crucial to the effective management of the WRL fishery. Furthermore, this spatial analysis conducted on a monthly scale has the potential to further identify possible indicator species of localised environmental conditions that could continue to be monitored as part of the standard WRL puerulus monitoring program.