Trevor Hutton

Commonwealth Scientific and Industrial Research Organisation

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Sean Pascoe

Commonwealth Scientific and Industrial Research Organisation

Roy Deng

Shanxi Agricultural University

ÉE

Éva E. Plagányi

Commonwealth Scientific and Industrial Research Organisation

Ingrid van Putten

Centre for Marine Socioecology

Olivier Thébaud

Laboratoire des Sciences de l'Environnement Marin

André E. Punt

University of Washington

Tom Kompas

University of Melbourne

Darren Dennis

Transport Canada

Margaret Miller

Commonwealth Scientific and Industrial Research Organisation

Simon Mardle

University of Copenhagen

Cooperative Institutions

CSIRO Oceans and Atmosphere

105

Commonwealth Scientific and Industrial Research Organisation

University of Tasmania

Centre for Marine Socioecology

Ifremer

Centre National de la Recherche Scientifique

University of Queensland

Health Sciences and Nutrition

Institut de Recherche pour le Développement

NOAA National Marine Fisheries Service

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Indirect Impacts of COVID-19 on a Tropical Lobster Fishery’s Harvest Strategy and Supply Chain

Frontiers in Marine Science (2021)

Éva E. Plagányi Roy Deng Mark Tonks Nicole Murphy Sean Pascoe

The Torres Strait tropical rock lobster Panulirus ornatus (TRL) fishery is of immense social, cultural and economic importance to the region’s Indigenous fishers from both Australia and Papua New Guinea (PNG). During 2020, the COVID-19 pandemic indirectly impacted this fishery as well as a number of other fisheries reliant on international export markets. The TRL fishery is managed using an empirical (data-based) Harvest Control Rule (eHCR) to rapidly provide a recommended biological catch (RBC), based on catch, fishery-independent survey indices and catch-per-unit-effort (CPUE). Here, we summarize the impacts of COVID-19 on each of these critical data inputs and discuss whether the eHCR was considered adequately resilient to this unprecedented disruption to the system. Next, we use a quantitative supply chain index to analyze the impact of disruptions to the supply chain, and inform on potential adaptation strategies. The catch and CPUE data were impacted to varying degrees by external constraints influencing fishing effort, but the fishery-independent survey wasn’t affected and hence there remains an unbroken survey time-series for the fishery extending back to 1989. The eHCR was shown to be reasonably robust because it incorporates longer-term trends over a 5-year period, and accords substantially more weighting (80%) to the fishery-independent survey rather than CPUE data which can be affected by trade and other disruptions. Despite the eHCR not having been tested for scenarios such as a global pandemic, this robustness is a positive given the types of disruptions we will likely face in future climate. The weak links identified in the supply chain were the same as those previously highlighted as sensitive to climate change disruptions. Our supply chain analysis quantifies the impact on system resilience of alternative paths connecting producers to consumers and reinforces that supply chains may be particularly vulnerable to external disruptions if they are not sufficiently diverse.

10.3389/fmars.2021.686065

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Citations (17)

A Bayesian model of factors influencing indigenous participation in the Torres Strait tropical rocklobster fishery

Marine Policy (2012)

Ingrid van Putten Annie Lalancette Peter Bayliss Darren Dennis Trevor Hutton

Commonwealth

Casual

10.1016/j.marpol.2012.04.001

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Citations (57)

Towards Behavioural Models of Fleet Dynamics

Ingrid van Putten Soile Kulmala Natalie Dowling Katell G. Hamon Trevor Hutton

Dynamics

Source

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Citations (1)

Predicting Common Banana Prawn Potential Catch in Australia’s Northern Prawn Fishery

Rik C. Buckworth Emma Lawrence Bill Venables Peter C. Rothlisberg Trevor Hutton

Source

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Citations (0)

Fisheries management policy in South Africa : an evaluation of alternative management strategies for the Hake and Linefish fisheries

Trevor Hutton

Fisheries law

10.14288/1.0058272

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Determining the Appropriate Minimum Effort Levels for Use in Fisheries Dynamic Bioeconomic Models

Sustainability (2023)

Sean Pascoe Roy Deng Trevor Hutton D. Stott Parker

Managing fisheries to achieve ecological, economic and social sustainability is complex. The use of dynamic bioeconomic models can be and have been used to assist in determining management targets. However, optimizing profits over time can result in large reductions in fishing effort in the short term with adverse social consequences. There exist other benefits from maintaining fishing effort even in adverse conditions (e.g., maintain crew and fleet capacity). For this reason, many bioeconomic models have included some form of minimum effort, catch or short-term profit constraint. In this paper, we consider a range of approaches to assess an appropriate minimum fishing effort, including the estimation of fishery breakeven effort levels, and approaches based on historical fishing levels. These are tested using a bioeconomic model currently used for fishery management. We find that breakeven approaches tend to result in the most conservative effort levels and the highest net present value of profits. In contrast, using a proportion of the moving average of the observed fishing effort results in less conservative change in effort, while resulting in positive changes in the net present value of fishery profits. The approach also has the advantage of being dynamic, adjusting with recent fishery conditions.

Bioeconomics

Social discount rate

10.3390/su152416933

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Predicting the effects of area closures and fishing effort restrictions on the production, biomass, and species richness of benthic invertebrate communities

ICES Journal of Marine Science (2006)

Jan Geert Hiddink Trevor Hutton Simon Jennings Michel J. Kaiser

Abstract To effectively implement an Ecosystem Approach to Fisheries (EAF), managers need to consider the effects of management actions on the fishery and the ecosystem. Methods for assessing the effects on target stocks are generally well developed, but methods for assessing the effects on other components and attributes of the ecosystem are not. Area closures and effort controls are widely used fishery management tools that affect the distribution of fishing effort and may therefore have consequences for a range of species and habitats. An approach is developed to predict the effects of area closures and effort control on the biomass, production, and species richness of benthic communities in the North Sea. The redistribution of beam trawling effort as a result of management action was modelled with a random utility model, assuming that fishers selected fishing grounds on the basis of their knowledge of past catch rates. The effects of trawling on benthic invertebrates were predicted using a size-based model that accounted for differences in habitat among fishing grounds. Our simulations demonstrated that closures of different sizes and in different locations could have positive or negative effects on benthic communities. These predicted effects resulted from the trade-off between recovery in the closed areas and additional trawling effects in the open areas that arose from displaced fishing activity. In the absence of effort controls, closure of lightly fished areas had the strongest positive effect on benthic communities. Effort reduction also had a positive effect. Therefore, area closures in lightly fished areas, coupled with effort reduction, are expected to minimize the effects of fishing on benthic communities. As it was not possible to access full international data for the North Sea beam trawl fleet, the results of the analyses are illustrative rather than complete. Nevertheless, what is demonstrated is an effective approach for assessing the environmental consequences of fishery management action that can be used to inform management decision-making as part of an EAF.

Bottom trawling

10.1016/j.icesjms.2006.02.006

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Citations (130)

Integrating indigenous livelihood and lifestyle objectives in managing a natural resource

Proceedings of the National Academy of Sciences (2013)

Éva E. Plagányi Ingrid van Putten Trevor Hutton Roy Deng Darren Dennis

Evaluating the success of natural resource management approaches requires methods to measure performance against biological, economic, social, and governance objectives. In fisheries, most research has focused on industrial sectors, with the contributions to global resource use by small-scale and indigenous hunters and fishers undervalued. Globally, the small-scale fisheries sector alone employs some 38 million people who share common challenges in balancing livelihood and lifestyle choices. We used as a case study a fishery with both traditional indigenous and commercial sectors to develop a framework to bridge the gap between quantitative bio-economic models and more qualitative social analyses. For many indigenous communities, communalism rather than capitalism underlies fishers’ perspectives and aspirations, and we find there are complicated and often unanticipated trade-offs between economic and social objectives. Our results highlight that market-based management options might score highly in a capitalistic society, but have negative repercussions on community coherence and equity in societies with a strong communal ethic. There are complex trade-offs between economic indicators, such as profit, and social indicators, such as lifestyle preferences. Our approach makes explicit the “triple bottom line” sustainability objectives involving trade-offs between economic, social, and biological performance, and is thus directly applicable to most natural resource management decision-making situations.

Natural Resource Management

Triple Bottom Line

Equity

10.1073/pnas.1217822110

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Citations (151)

Atlantis Ecosystem Model Summit: Report from a workshop

Ecological Modelling (2016)

Mariska Weijerman Jason S. Link Elizabeth A. Fulton Esben Moland Olsen Howard Townsend

Summit

Ecosystem-Based Management

Ecosystem model