Partnerships Towards Sustainable use of Australia's Northern Prawn Fishery

Dichmont, Catherine M.; Loneragan, N.R.; Brewer, D.T.; Poiner, I. R.

doi:10.1002/9780470996072.ch10

Cited by 5 publications

(6 citation statements)

References 30 publications

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“…Our estimate of around 5000 t of annual bycatch shows that, despite the JBG occupying only 5% of the NPF managed area and having restricted fishing times (due to tidal influences on prawn abundance), it contributes about 11% to the 47,000 t of bycatch estimated to be taken each year in this fishery (Pender et al, 1992). This percentage is likely to be conservative considering the significant reduction in effort in other regions of the NPF since the 47,000 t estimate was made (Dichmont et al, 2007), and the introduction of Bycatch Reduction Devices (BRDs) and Turtle Exclusion Devices (TEDs), which remove many of the larger animals from the catch (Brewer et al, 2006). This high bycatch take and the unique species assemblage with temporal variability is very different to other high trawl effort regions in the NPF, such as the Gulf of Carpentaria (see Stobutzki et al, 2001a) and will need to be considered independently within the long-term bycatch monitoring program currently being implemented in this fishery.…”

Section: Implications For Bycatch Managementmentioning

confidence: 97%

“…Being able to demonstrate ecological sustainability is increasingly important to managers of many of the world's fisheries (Hall and Mainprize, 2005;Dichmont et al, 2007). A growing body of literature confirms many types of fishing have a significant effect on non-target populations, habitats and communities (Sainsbury, 1987;Hall, 1996;Pauly et al, 2001;Kaiser et al, 2002).…”

Section: Introduction and Objectivesmentioning

confidence: 99%

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Species composition and temporal variation of prawn trawl bycatch in the Joseph Bonaparte Gulf, northwestern Australia

et al. 2008

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Section: Implications For Bycatch Managementmentioning

confidence: 97%

Section: Introduction and Objectivesmentioning

confidence: 99%

Species composition and temporal variation of prawn trawl bycatch in the Joseph Bonaparte Gulf, northwestern Australia

et al. 2008

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“…1) is one of Australia's most valuable commercial fisheries (Dichmont et al 2007). The fishery targets two main species-groups of prawns [shrimp], banana prawns (Penaeus (Fenneropenaeus) merguiensis) and tiger prawns (P. esculentus and P. semisulcatus).…”

Section: Study Area and Problemmentioning

confidence: 99%

Qualitative mathematical models to support ecosystem‐based management of Australia's Northern Prawn Fishery

Dambacher

Rothlisberg

Loneragan

2015

Ecological Applications

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Abstract. A major decline in the catch of the banana prawn [shrimp], Penaeus (Fenneropenaeus) merguiensis, occurred over a six-year period in the Weipa region of the northeastern Gulf of Carpentaria, Australia. Three main hypotheses have been developed to explain this decline: (1) prawn recruitment collapsed due to overfishing; (2) recruitment collapsed due to a change in the prawn's environment; and (3) adult banana prawns were still present, but fishers could no longer effectively find or catch them. Qualitative mathematical models were used to link population biology, environmental factors, and fishery dynamics to evaluate the alternative hypotheses. This modeling approach provides the means to rapidly integrate knowledge across disciplines and consider alternative hypotheses about how the structure and function of an ecosystem affects its dynamics. Alternative models were constructed to address the different hypotheses and also to encompass a diversity of opinion about the underlying dynamics of the system. Key findings from these analyses are that: instability in the system can arise when discarded fishery bycatch supports relatively high predation pressure; system stability can be enhanced by management of fishing effort or stock catchability; catch per unit effort is not necessarily a reliable indicator of stock abundance; a change in early-season rainfall should affect all stages in the banana prawn's life cycle; and a reduced catch in the Weipa region can create and reinforce a shift in fishing effort away from Weipa. Results from the models informed an approach to test the hypotheses (i.e., an experimental fishing program), and promoted understanding of the system among researchers, management agencies, and industry. The analytical tools developed in this work to address stages of a prawn life cycle and fishery dynamics are generally applicable to any exploited natural resource.

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“…These include the compulsory use of turtle exclusion and bycatch reduction devices (Brewer et al. 2006), implementation of a bycatch monitoring programme, a voluntary ban of shark fining, spatial/seasonal closures and reductions in fishing effort (Kenyon, Jarrett, Bishop, Taranto, Dichmont & Zhou 2005; Dichmont, Loneragan, Brewer & Poiner 2007; Brewer et al. 2008).…”

Section: Discussionmentioning

confidence: 99%

“…A range of important management actions has been implemented for assessing and reducing impacts on bycatch in the NPF, especially in the last 15 years (see Brewer, Heales, Griffiths, Haywood, Milton, Blaber, Jones & Stobutski 2008). These include the compulsory use of turtle exclusion and bycatch reduction devices (Brewer et al 2006), implementation of a bycatch monitoring programme, a voluntary ban of shark fining, spatial/seasonal closures and reductions in fishing effort (Kenyon, Jarrett, Bishop, Taranto, Dichmont & Zhou 2005;Dichmont, Loneragan, Brewer & Poiner 2007;Brewer et al 2008). These developments have been important components to managing the fishery.…”

Section: Implications For Bycatch Managementmentioning

confidence: 99%

Bycatch in a tropical schooling – penaeid fishery and comparisons with a related, specialised trawl regime

Dell

Brewer

Griffiths

et al. 2009

Fisheries Management Eco

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The bycatch in a tropical Australian banana prawn, Penaeus merguiensis (de Man), fishery is described and contrasted with the closely related tiger prawn, Penaeus semisulcatus De Haan and Penaeus esculentus Haswell, fishery. Most of the similarity between banana prawn fishery catches was accounted for by three teleost species constituting 51.4% of the total bycatch weight. The bycatch assemblage structure of this fishery was significantly different (P < 0.05) from the adjoining tiger prawn fishery. The banana prawn fishery had a higher mean bycatch catch rate from shorter duration trawls, but lower estimated total annual bycatch (1502 t yr )1 ) than the longer duration trawls of the tiger prawn fishery (20 073 t yr )1 ). This study provides new data for quantifying bycatch and improving the accuracy of quantitative risk assessments currently being used to demonstrate sustainability of bycatch populations. The information will be incorporated into collaborative development of a long-term monitoring programme. K E Y W O R D S : bycatch monitoring, management, Penaeus merguiensis, prawn trawling.

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Partnerships Towards Sustainable use of Australia's Northern Prawn Fishery

Cited by 5 publications

References 30 publications

Species composition and temporal variation of prawn trawl bycatch in the Joseph Bonaparte Gulf, northwestern Australia

Species composition and temporal variation of prawn trawl bycatch in the Joseph Bonaparte Gulf, northwestern Australia

Qualitative mathematical models to support ecosystem‐based management of Australia's Northern Prawn Fishery

Bycatch in a tropical schooling – penaeid fishery and comparisons with a related, specialised trawl regime

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