Estimating maximum economic yield in multispecies fisheries: a review

Hoshino, Eriko; Pascoe, Sean; Hutton, Trevor; Kompas, Tom; Yamazaki, Satoshi

doi:10.1007/s11160-017-9508-8

Cited by 31 publications

(26 citation statements)

References 117 publications

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“…It is worth noting that maximising the fishery's net profits after 10 years requires to harvest hake below and sole above their respective F MSY reference points. The fact that fisherywide reference points (multispecies MSY or MEY) can lead to the under-or over-exploitation of individual stocks has already been highlighted by many authors [16,23,43,71,72]. Finally, we observed that the dynamic MEY is sensitive to the value of the discount rate, and, as expected, the higher the discount rate, the higher the associated harvest rates.…”

Section: Its Application To the Bay Of Biscay Demersal Mixed Fisherysupporting

confidence: 78%

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Providing Integrated Total Catch Advice for the Management of Mixed Fisheries with an Eco-viability Approach

Briton

Macher

Merzéréaud

et al. 2019

Environ Model Assess

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Well-established single-species approaches are not adapted to the management of mixed fisheries where multiple species are simultaneously caught in unselective fishing operations. In particular, ignoring joint production when setting total allowable catches (TACs) for individual species is likely to lead to over-quota discards or, when discards are not allowed, to lost fishing opportunities. Furthermore, economic and social objectives have been poorly addressed in the design of fisheries harvest strategies, despite being an explicit objective of ecosystem-based fisheries management in many jurisdictions worldwide. We introduce the notion of operating space as the ensemble of reachable, single-species fishing mortality targets, given joint production in a mixed fishery. We then use the concept of eco-viability to identify TAC combinations which simultaneously account for multiple objectives. The approach is applied to the joint management of hake and sole fishing in the Bay of Biscay, also accounting for catches of Norway lobster, European seabass and anglerfish. Results show that fishing at the upper end of the MSY range for sole and slightly above Fmsy for hake can generate gains in terms of long-term economic viability of the fleets without impeding the biological viability of the stocks, nor the incentives for crews to remain in the fishery. We also identify reachable fishing mortality targets in the MSY ranges for these two species, given existing technical interactions. Keywords Eco-viability • Mixed fisheries management • Bio-economic modelling • Integrated TAC advice 1 Introduction Ecosystem-based approaches are increasingly being adopted for the management of natural resources, and fisheries make no exception, with the proposal of ecosystem-based fisheries management (EBFM) guidelines in the early 2000s [1, 2], and their subsequent implementation in policy [3, 4]. Among other aspirations, EBFM aims at accounting for the technical interactions among jointly caught species Electronic supplementary material The online version of this article (

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Section: Its Application To the Bay Of Biscay Demersal Mixed Fisherysupporting

confidence: 78%

“…The practical implementation of this approach, however, has proved difficult, as it requires both a good knowledge of all commercial stocks in a mixed fishery (where only the most valuable stocks are generally well known) and a reliable representation of its economic components (i.e. fleets' cost structures and market prices) [15,16].…”

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confidence: 99%

Providing Integrated Total Catch Advice for the Management of Mixed Fisheries with an Eco-viability Approach

Briton

Macher

Merzéréaud

et al. 2019

Environ Model Assess

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“…The situation is more severe for mixed fisheries, in which technical and trophic interactions have substantial impacts on dynamics of ecosystems (Jennings and Rice, 2011). This fact leads to increasing recognition that fisheries management should move toward comprehensive ecosystem considerations (Garcia, 2003;Hollowed et al, 2011), calling a shift from species-specific stock management to more general "ecosystem-based fisheries management" (EBFM) (Pitcher, 2008;Jennings and Rice, 2011). To make the idea of EBFM operational, ecosystem models are necessary to predict future changes in fisheries yields and ecosystem dynamics with respect to different fishing patterns and management regimes.…”

Section: Introductionmentioning

confidence: 99%

“…For most developing countries, data of ecosystems are typically limited and poor in resolution due to lacking long-term, consistent observation programs. Meanwhile, it is in these regions that ecosystem models and EBFM are urgently needed, as their fisheries are often mixed in species and inadequate in management (Hollowed et al, 2011). Therefore, we advocate that substantial research efforts are needed to clarify the implementation of ecosystem models to deliver reliable fishery projections under insufficient data conditions.…”

Section: Introductionmentioning

confidence: 99%

Modeling the Dynamics of Multispecies Fisheries: A Case Study in the Coastal Water of North Yellow Sea, China

Zhang

Pan

et al. 2020

Front. Mar. Sci.

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Ecosystem models have been developed for detecting community responses to fishing pressure and have been widely applied to predict the ecological effects of fisheries management. Key challenges of ecosystem modeling lie in the insufficient quantity and quality of data, which is unfortunately common in the marine ecosystems of many developing countries. In this study, we aim to model the dynamics of multispecies fisheries under data-limited circumstances, using a multispecies size-spectrum model (MSSM) implemented in the coastal ecosystem of North Yellow Sea, China. To make most of available data, we incorporated a range of data-limited methods for estimating the life-history parameters and conducted model validation according to empirical data. Additionally, sensitivity analyses were conducted to evaluate the impacts of input parameters on model predictions regarding the uncertainty of data and estimating methods. Our results showed that MSSM could provide reasonable predictions of community size spectra and appropriately reflect the community composition in the studied area, whereas the predictions of fisheries yields were biased for certain species. Errors in recruitment parameters were most influential on the prediction of species abundance, and errors in fishing efforts substantially affected community-level indicators. This study built a framework to integrate parameter estimation, model validation, and sensitivity analyses altogether, which could guide model development in similar mixed and data-limited fisheries and promote the use of size-spectrum model for ecosystem-based fisheries management.

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“…The OSY approach recommends lower fishing mortality levels than MSY, which allows the stock to recover above the BRP levels for MSY. Hoshino et al (2018) reviewed the implementation of a maximum economic yield (MEY) principle in management policies for a multiple-species fishery in Australia to obtain the maximum economic benefit from exploiting the stocks. However, this approach requires large quantities of data to estimate the reliable values of each BRP (Mardle et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Optimal fishing mortality assignment for southern hake Merluccius australis in Chile

López

Jiménez²,

Canales³

2020

Lat. Am. J. Aquat. Res.

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Since 1979, southern hake (Merluccius australis) has been exploited in Chile from the Bio Bio to the Magallanes regions, between the parallels 41°28.6'S and 57°S. There is evidence of a constant fishing effort and a sustained reduction of the fish population, consistent with a progressive decrease in total annual catches. Management strategies based on the maximum sustainable yield (MSY) and quota assignment/ distribution criteria have not been able to sustain acceptable biomass levels. A non-linear optimization model with two objective functions was proposed to determine an optimal total catch quota for more sustainable exploitation of this fishery. The first function maximizes the total catch over time in response to an optimal assignment of fishing mortality rates per fleet; the second function maximizes the total economic benefit associated with the total catch. The dynamics of the fish population were represented with the equations of a predictive age-structured model. Decision variables were fishing mortality rates and annual catch quotas per fleet, subject to constraints that guarantee a minimum level of biomass escape over a long-term period. The input parameters were obtained from the last stock evaluation report carried out by the Instituto de Fomento Pesquero (IFOP) of Chile. The historical background data of the fishery and the regulatory framework were relevant aspects of the methodology. Five scenarios were evaluated with the two objective functions, including a base scenario, which considered the referential mortality rate as input data as the average mortality rate per fleet from 2007 to 2012. Total economic benefits fluctuate between 102 and USD 442 million for total catches in the range of 108 to 421 thousand tons, which were obtained from maximizing the economic and biological objective functions. Economic benefit/catch ratios were reduced for scenarios with higher constraints on catch limits, and they were more efficient from a biological point of view. Situations with lighter constraints showed in general higher economic benefits and better performance ratios than those with stronger restrictions. The use of optimization models may provide a useful tool to evaluate the effect of regulations for adequate conservation and economical utilization of a limited resource.

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Estimating maximum economic yield in multispecies fisheries: a review

Cited by 31 publications

References 117 publications

Providing Integrated Total Catch Advice for the Management of Mixed Fisheries with an Eco-viability Approach

Providing Integrated Total Catch Advice for the Management of Mixed Fisheries with an Eco-viability Approach

Modeling the Dynamics of Multispecies Fisheries: A Case Study in the Coastal Water of North Yellow Sea, China

Optimal fishing mortality assignment for southern hake Merluccius australis in Chile

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