109 results
Environment
PROJECT NUMBER • 1995-054
PROJECT STATUS:
COMPLETED

Development and implementation of a national standard for a recreational fisheries database by all fisheries agencies

SIRFIS is and acronym for Standardised Integrated Recreational Fisheries Information System. The system is designed to provide a user friendly and flexible environment in which to enter, store and retrieve data relating to recreational fisheries. The system also allows storage of comprehensive...
ORGANISATION:
Department of Primary Industries (QLD)

Developing jungle perch fingerling production to improve fishing opportunities

Project number: 2012-213
Project Status:
Completed
Budget expenditure: $482,907.00
Principal Investigator: Michael Hutchison
Organisation: Department of Primary Industries (QLD)
Project start/end date: 14 Jun 2012 - 29 Jun 2015
Contact:
FRDC

Need

Jungle perch once occurred widely in coastal Queensland rivers, from Cape York to Northern NSW. Central and southern populations have declined or become locally extinct due to dams and weirs blocking migration pathways between saltwater (where they spawn) and freshwater habitats (where they reside as juveniles and adults). Unlike barramundi, mullet and bass; jungle perch cannot persist long-term in saltwater habitats. Barriers lead to rapid local extinction. Construction of fishways on barriers in the past 10 years has created suitable conditions for the reintroduction of jungle perch. There are limited opportunities for natural recolonisation, and remnant adult populations of local strains are too few for translocation to be a practical solution. Restocking from captive bred individuals is the only option to bring back jungle perch fisheries.

Restoring wild jungle perch fisheries is a high priority for recreational fishers in Queensland. Reintroduction of self sustaining populations in rivers in south-eastern Queensland and the Mackay-Whitsunday Region will provide angling opportunities to large populations of anglers. Development of jungle perch fingerling production will also create future opportunities to further enhance Queensland's stocked impoundments and make jungle perch accessible to even more anglers.

Recent research by DEEDI has solved much of the reproductive biology of jungle perch, which can now be spawned regularly in captivity. Jungle perch larvae are much smaller (2.3 mm) than bass and barramundi larvae and establishment of first feeding has been problematic. Strategies to promote larval feeding need to be developed. The transition from larvae to fingerlings is critical for future development of jungle perch fisheries.

Objectives

1. Develop hatchery production techniques for jungle perch fingerlings
2. Successfully release jungle perch fingerlings into suitable south-eastern Queensland and Mackay-Whitsunday regional waterways
3. Communicate with anglers on the restoration of jungle perch fisheries
4. Understand environmental factors influencing post-release survival of jungle perch in rivers.
5. Develop a jungle perch production manual for fish hatcheries

Final report

ISBN: 978-0-7345-0453-1
Author: Michael Hutchison
Final Report • 2016-03-17 • 5.18 MB
2012-213-DLD.pdf

Summary

This project has for the first time demonstrated the feasibility of hatchery production of jungle perch fingerlings. The research on jungle perch production has enabled a hatchery production manual with accompanying videos to be produced. This has given private commercial hatcheries the information needed to produce jungle perch fingerlings. Several hatcheries have already indicated an interest in producing jungle perch and will be assisted to do so in 2016. Currently jungle perch are not a permitted stocking species, so cannot be sold to fish stocking groups. However, hatcheries will be able to sell fingerlings to the aquarium trade or supply grow out facilities that could produce jungle perch for human consumption. Should jungle perch become a permitted species for stocking, this will provide hatcheries with a major new product option to sell to fish stocking groups. It would also benefit anglers by providing another iconic species for impoundment stocking programs. This could have flow-on benefits to regional economies through angler tourism.

Should the pilot reintroductions of jungle perch into streams result in self-sustaining jungle perch populations, then there will be three restored jungle perch populations close to major population centres. This will create a new opportunity for anglers not normally able to target jungle perch. Since the majority of anglers who target jungle perch are catch and release fishers, angling is expected to have minimal impact on recovery of the populations.

This project led to the development of a hatchery manual for jungle perch production and to a summary brochure. In late 2014 and in 2015 researchers were able to make the first ever releases of jungle perch fingerlings back into rivers and streams within their historical range.

Keywords: Jungle perch, Kuhlia rupestris, hatchery production, restoration, fish stocking, captive breeding, larval culture, recreational fishing.

Project products

Manual • 2.19 MB
2012-213 Jungle fingerling production manual.pdf

Summary

This manual is based on the knowledge gained by researchers at the Bribie Island Research Centre (BIRC), working on developing jungle perch Kuhlia rupestris captive breeding as part of the FRDC funded project 2012/213 “Developing jungle perch fingerling production to improve fishing opportunities”. Further refinements can certainly be made to improve larval rearing and fingerling production. This manual reports on methods that have worked at BIRC to date, and perhaps more importantly, on what didn’t work. Knowledge of what has failed will help private hatchery operators avoid mistakes as they try to further refine the jungle perch production process in their own facilities.

The manual describes each of the key parts of jungle perch production, including broodstock management, spawning induction, spawning, egg and larvae management, live feed production, pond management, pond harvesting and fingerling management. The manual also includes links to video segments to demonstrate how things were done at BIRC. Videos are integral for the use of this manual. Click on the video link at the end of each production step described in this manual. It is intended that the video segments will enhance understanding of the jungle perch production process. The videos in this document are also available in the attached video folder that accompanies DVD and USB drive versions of this document and can be viewed as stand-alone files. The written document contains the majority of the technical information required, such as stocking densities, fertilising rates, feeding rates etc. The videos demonstrate the processes, which words are not always adequate to describe.

Brochure • 453.38 KB
2012-213 Jungle perch project summary brochure.pdf

Summary

This brochure outlines the achievement of the project. It is intended to provide general information on project outcomes to recreational anglers.

It summarises the results of the project.

Industry
PROJECT NUMBER • 2017-019
PROJECT STATUS:
COMPLETED

Freshwater fish attracting structures (FAS): Evaluating a new tool to improve fishing quality and access to fisheries resources in Australian impoundments

This document has been compiled from various sources and, to the authors’ knowledge, represents the best advice currently available regarding the use of fish attracting structures to improve recreational angling in Australian impoundments. Although the principles outlined in this document may...
ORGANISATION:
Department of Primary Industries (QLD)

Reduction of toothed whale interactions with fishing gear: development and assessment of predation mitigation devices around longlines

Project number: 2003-016
Project Status:
Completed
Budget expenditure: $154,173.26
Principal Investigator: Geoff McPherson
Organisation: Department of Primary Industries (QLD)
Project start/end date: 29 Jun 2003 - 28 Dec 2007
Contact:
FRDC

Need

Predation by toothed whales on fish hooked by longline and dropline gear is becoming more prevalent throughout Australian waters. The duration of the predation period appeared to be seasonal in the north-western Coral Sea fishery during the 1980's. However over recent seasons the duration of the mammals’ presence in the Coral Sea appeared to increase and observations of adults teaching young animals to predate on hooked fish became common. Predation by toothed whales in the Falkland Island Patagonian toothfish fishery appears to be a learned response with the problem dramatically increasing from a short seasonal problem prior to 2001, to a full season problem in 2002.

The development of a combination of predation mitigation methods is urgently required. Losses to the fisheries due to predation, and the increasing likelihood that mortality to mammals may occur with resultant poor publicity for the fishery and increased scrutiny of biodiversity and sustainability issues, necessitate immediate action. Predation by toothed whales in the eastern, southern and western Australian longline fisheries is expected to increase. Apart from an informal review of SENTMAC operations in the blue-eye trevalla fishery by Tasmanian Parks and Wildlife (Rosemary Gales, pers. comm.), no fisheries data are available for the incidence of predation issues by toothed whales in Australian waters. The AFMA Observer Program has commenced monitoring of all forms of predation damage in Australian fisheries, including seals, sharks and toothed whales.

Terminal stage predation events in the north-western Coral Sea fishery have only recently been observed as mammals appear to have become less apprehensive about approaching fishing vessels. The nature of the predation evidence on the fish is now more varied in the Coral Sea than in the mid-1980’s when it was first reported. This suggests that more than one species may be involved, each with its own characteristic bite pattern (McPherson et al. 2003). Whether the terminal stage of each event is acoustic, visual, or a combination of both is not known. Observations of the method of approach of the mammals during predation events, would assist in the development of appropriate mitigation and gear modification methods.

Predation has been increasing on marlin hooked by the Cairns-based game fishery. Predation is now occasionally reported by smaller toothed whales such as dolphins (family Delphinidae) from coastal fisheries (including Queensland waters) and is likely to increase in commercial and recreational fisheries all State waters as it has in coastal Hawaiian waters.

At the Queensland Fisheries Service (QFS) "Invitational workshop on acoustics to reduce marine mammal interactions" Brisbane April 2002, the keynote speaker Prof Jon Lien (Chair of Ministers Advisory Committee on Fisheries and Oceans, Canadian Minister of Fisheries and Oceans) brought to Australia by NHT funding indicated that predation issues are now reaching extreme levels in at least a dozen countries. No research was being conducted on predation issues, and there was no clear certainty within fisheries circles about what research to conduct.

While the mammal predation issue does not pose a major threat to the continuation of the longline fishery, there is real concern that mammal interaction issues may not be considered on a scientific basis. Bache and Evans (1999) pointed out that while Australian fisheries albatross bycatch policy was influenced by scientific data, environmental non-government organisations (NGO’s) were instrumental in determining Government dolphin bycatch policy. Policy development catalysed by NGO action was considered by Bache and Evans (1999) as least likely to achieve consensus resolution. Commonwealth and State fisheries policy would best be served by achieving consensus resolution through scientific monitoring of the interactions.

Interaction problems are not restricted to economic returns to the fishery and direct threats to the well being of toothed whales. Increasing predation rates reflect a probable change of diet for some species. Based on interactions between dolphins and some trawl fisheries, there could also be a disproportionate population increase of some species that would put many animals under threat if fishing effort, hence opportunities for predation, were to reduce.

Objectives

1. To complete a three dimensional acoustic tracking system to achieve sufficient resolution to locate sound sources (both tonal and impulsive requiring different but overlapping methodology) around longline fishing gear and with faster acoustic source identification and tracking.
2. To facilitate the development and testing of a prototype two dimensional automated dolphin echolocation (i.e. impulsive sound) tracking system, to three dimensional situations around longlines, particularly during gear hauling operations.
3. To facilitate development of gear monitoring devices specifically related to toothed whale predation through Engineering Honours projects, including acoustically triggered predation timer and pinger devices, gear deployment monitoring systems, and acoustic predation mitigation devices.
4. To observe the behavioural and acoustic nature of terminal predation events in longline fisheries during peak fishery/predation periods, and to associate acoustic signals with toothed whale species.
5. To test a range of a small number of prototype predation mitigation devices (project designed, and modified by the manufacturer from suitable commercial acoustic systems) in the east coast tuna fishery for source level output and frequency including the known peak sensitivity of the two main species of toothed whales in tropical Australian waters.
6. To test mechanical predation mitigation devices developed in association with industry.
7. To observe the behavioural and acoustic reactions of mammals to various predation mitigation devices.
8. To achieve an industry Code of Practice for acoustic predation mitigation device setting to ensure a consistency of gear performance. Extension work of SEANET with the Eastern Tuna fishery would be required.
9. To provide a low-cost Spanish mackerel tracking pinger for use with the FRDC funded GENETAG project (FRDC 2002/011) to estimate short-term post-tagging mortality from conventional tagging systems.
10. An international expert with experience of acoustic methods to reduce marine mammal interactions to conduct a mid-project review
11. To review the literature on acoustic methods in use to reduce interactions between toothed whales and fishing gear
Industry
Environment
Environment
PROJECT NUMBER • 2021-119
PROJECT STATUS:
COMPLETED

Improving bycatch reduction strategies and escape vents in Queensland Mud Crab fisheries

The Queensland Crab Fishery is an iconic fishery, which encompasses the harvest of mud crabs (Scylla serrata, the Giant Mud Crab, and Scylla olivacea, the Orange Mud Crab) and Blue Swimmer Crabs (Portunus armatus and Portunus pelagicus), predominately using baited crab pots of various designs. The...
ORGANISATION:
Department of Primary Industries (QLD)
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