The emerging Billfish fishing grounds of northern Australia: fisheries description, movements, and hot-spots

Project number: 2021-001
Project Status:
Current
Budget expenditure: $442,416.00
Principal Investigator: Keller Kopf
Organisation: Charles Darwin University (CDU)
Project start/end date: 9 Dec 2021 - 27 Mar 2025
Contact:
FRDC

Need

There is a need to increase economic growth of environmentally sustainable industries in northern Australia and this project aims to increase recreational billfish fisheries tourism and facilitate management of this emerging resource. The tourism industry in Australia including recreational fisheries and associated travel sectors have been severely impacted due to Covid-19. With an estimated economic value of $3185AUD per charter fishing trip, recreational billfish fisheries represent a high-value and sustainable option to help develop post-Covid-19 fisheries tourism in northern Australia.

There is an emerging recreational billfish fishery in Northern Territory waters but growth, participation and management of a sustainable fishery has been hampered by a lack of data and public awareness. Anecdotal evidence suggests that a recent increase in catches of sailfish and black marlin in waters off northern Australia may have been facilitated by the closure of Taiwanese Gillnet fisheries which operated in Australian waters between 1972 and 1986. However, there has been little scientific evaluation of past or current billfish fisheries resources in the region, and better quality fisheries data and information on the spatial distribution and seasonal movement patterns are required to guide development and management of sustainable fisheries. The catch-and-release billfish fisheries of northern Australia are likely to be sustainable but stocks are likely to be affected by fisheries in the broader Indo-Pacific region and further information is needed to inform assessments as part of the Status of Australian Fish Stocks Report. As is this a developing fishery there is a need to form a ground up educational programs on the best practices for responsible handling of billfish in the NT recreational fishery.

Objectives

1. To provide a description of the emerging recreational fishery for billfishes in northern Australia, including analyses of historic and ongoing conventional tagging data, historical records of billfish larvae (1956−1981) to map spawning areas, and evaluate whether historical commercial catch data on billfishes is available from Taiwanese gillnet fisheries (1972-1986).
2. To evaluate the movement patterns and hot-spots of billfish habitat-use in emerging recreational fishing grounds of northern Australia using pop-off satellite archival tags.
3. To conduct a pilot study evaluating the feasibility of tagging billfishes with pop-off satellite archival tags,internally and externally implanted acoustic tags for long-term monitoring of billfish residency and site fidelity on fishing grounds.
4. To collect tissue samples from northern Australia for later analysis in a separate project examining the genetic population structureand trophic ecology of billfish (Sailfish and Black Marlin)
5. To engage recreational fishers in citizen science evaluation of billfish movements and increase growth and economic development of sustainable billfish fisheries in northern Australia through a top end billfish sprint and fisher education.

Related research

Environment
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PROJECT NUMBER • 2021-001
PROJECT STATUS:
CURRENT

The emerging Billfish fishing grounds of northern Australia: fisheries description, movements, and hot-spots

1. To provide a description of the emerging recreational fishery for billfishes in northern Australia, including analyses of historic and ongoing conventional tagging data, historical records of billfish larvae (1956−1981) to map spawning areas, and evaluate whether historical commercial catch data...
ORGANISATION:
Charles Darwin University (CDU)
Industry

Review of regulation and policy guiding use of artificial reefs and Fish Aggregating Devices (FAD) in Australian waters

Project number: 2021-046
Project Status:
Current
Budget expenditure: $226,750.00
Principal Investigator: Daryl McPhee
Organisation: Bond University
Project start/end date: 31 Jan 2022 - 30 Jan 2023
Contact:
FRDC

Need

Globally, Fish Aggregating Devices (FADs) and artificial reefs are increasingly used tools to enhance fisheries – particularly recreational fisheries. Over the last decade there has been greater use of these tools in Australia. In recent years, FADs have been increasingly deployed including in Commonwealth waters for the purpose of enhancing recreational fisheries managed by state governments. There are concerns that the recent rapid deployment of FADs, particularly in Commonwealth waters have negatively impacted the operations of some Commonwealth fisheries such as the East Coast Tuna and Billfish Fishery. There are also marine safety concerns which extends beyond just commercial fishing vessels. There is a need to better understand the regulatory environment for FADs and artificial reefs to ensure that benefits can be realised while impacts avoided or mitigated. The regulatory environment for the deployment of FADs (and artificial reefs) in Commonwealth waters is potentially different from that when they are deployed in state waters. It also extends beyond fisheries legislation and includes the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act 1999), the Sea and Submerged Lands Act 1973, and the Navigation Act 2012. The administration of these Acts and associated subordinate legislation crosses several government agencies. In relation to the EPBC Act 1999, the Commonwealth marine area is a Matter of National Environmental Significance (MNES). There is however little specific guidance as to whether FADs potentially impact MNES and how any impacts can be mitigated. In addition to better understand the complex regulatory environment, there is a need to develop more effective and fit for purpose engagement strategies with all stakeholders. There is a need for national project as it is an issue which is now cross jurisdictional.

Please note we have attached responses from three State Ministers indicating their support for a collaborative approach to this issue.

Objectives

1. Identification of the current regulatory and policy frameworks in all Australian jurisdictions that guide or impact the deployment and use of FADs and artificial reefs in State, Territory and Commonwealth waters.
2. Identification of the current and projected use of FADs and artificial reefs in Australian jurisdictions.
3. With relevant input through a workshop and other tools where appropriate, development of a best practice guide for the planning, sighting and deployment of FADs and artificial reefs.