Can overexploited fisheries recover by self-organization? Reallocation of fishing effort as an emergent form of governance

Brochier, Timothée; Auger, Pierre; Thiao, Djiga; Bah, Alassane; Ly, Sidy; Nguyen-Huu, Tri; Brehmer, Patrice

doi:10.1016/j.marpol.2018.06.009

Cited by 33 publications

(30 citation statements)

References 37 publications

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“…Current overexploitation of fishery resources is partly driven by an excess of fishery effort (Brochier et al 2018), thus FRAs should prioritise the protection of ecologically important areas over the fishery (Kenchington 2017). Therefore, our FRA optimisation approach did not include the fishery footprint as a penalisation in the spatial prioritisation algorithm.…”

Section: Discussionmentioning

confidence: 99%

“…However, minimising the impact on fishers may be counter effective as it can displace important conservation areas and prioritise other areas that are seldom fished, projecting little ecological impact. The current overexploitation of fishery resources is partly driven by an excess of fishery effort (Brochier et al 2018), thus placing a FRA in a non-fished area will inevitably have no effect as it does not reduce fishing effort in conservation hot-spots. We believe that this is a strong argument against the use of fishery footprint as a penalisation, and we argue that this impact should be assessed a posteriori.…”

Section: Assessing Spatiotemporal Priority Areasmentioning

confidence: 99%

“…However, we argue that including the fishery footprint as a penalisation may be counter effective. The current overexploitation of fishery resources is partly driven by an excess of fishery effort (Brochier et al 2018); thus FRAs should prioritise the protection of ecologically important areas over the distribution of fishery effort. In fact, heavily fished areas may coincide with high productivity areas and minimising the impact on fishers could displace selected areas for conservation to areas that are seldom fished, projecting little ecological impact.…”

Section: Introductionmentioning

confidence: 99%

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Evidence for spatiotemporal shift in demersal fisheries management priority areas in the western Mediterranean

Paradinas

Giménez

Conesa

et al. 2021

Preprint

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Fishery restricted areas (FRAs) are pivotal for the mitigation of fishery impacts, but the designation of optimum FRAs is complex, and currently there is no quantitative guideline to assess the spatio-temporal variability of conservation priority areas. Fishery systems are naturally dynamic, and shifts may at two different levels, the species level and the community level. As a consequence, the identification of optimum FRAs using standard fishery data should follow a spatiotemporal procedure that accounts for both levels of dynamism. Here, we describe an approach to optmise the location of FRAs assessing the spatiotemporal dynamism of conservation priority areas at both the species and the multi-species level. To do so, we first assess species-specific dynamisms through Species Distribution Models (SDMs). Then, we use SDM results to explore different spatial prioritisation software configurations to assess the suitability of fixed, progressive, or more complex fishery restricted area designs. Finally, we assess the ecologic and socioeconomic impact of FRA candidates based on our SDM estimates and fishery footprint data, respectively. The proposed method is illustrated through a western Mediterranean case study using scientific trawl survey data on six commercially important species collected over 17 years. Following this approach, we identified two main priority area patterns in the study area. Each pattern is predominant during a different period of the study, constituting a clear example of the importance of regularly re-assessing FRA designs. We conclude that a spatiotemporal assessment of conservation priority areas using long-term data is essential to inform the location of new FRAs.

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Section: Discussionmentioning

confidence: 99%

Section: Assessing Spatiotemporal Priority Areasmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evidence for spatiotemporal shift in demersal fisheries management priority areas in the western Mediterranean

Paradinas

Giménez

Conesa

et al. 2021

Preprint

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“…In this context, the widespread deployment of open access ARs would concentrate shing effort, and could shift the whole shery towards a state of over-exploitation. Indeed, the model predicted that enhanced production on ARs could not keep pace with unrestricted access, which might be particularly true in Senegal where shing effort rapidly reorganizes itself according to local yields 21 . These results are consistent with existing theoretical studies of the impact of sher movement to high production areas in and around MPAs 22 .…”

Section: Discussionmentioning

confidence: 99%

Artificial reefs: a double-edged fishery management tool

Brochier¹,

Brehmer²,

Mbaye³

et al. 2021

Preprint

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Artificial reefs (ARs) are one of the most popular means of supporting marine ecosystem conservation and coastal fisheries, particularly in developing countries. However, ARs generate complex socio-bio-economic interactions that require careful evaluation. This is particularly the case for ARs outside no-take zones, where fish might be subject to enhanced exploitation due to easier catchability Here, we conducted an interdisciplinary study on how ARs impact fish and fishing yields, combining mathematical and sociological approaches. Both approaches confirmed that fishery yields declined when ARs were exploited as if they were open access areas. This situation typically occurs in areas with weak governance, which is common in developing countries. To avoid these adverse effects we recommend to prioritize the onset of a long-term surveillance system against illegal fishing activities, and to adapt design and location of the ARs based on both and local and academic knowledge, before the deployment of ARs.

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“…We consider a coastal area with a single fishing zone. The model introduced in [1] is summarised below.…”

Section: Presentation Of a Fishery Model With Variable Pricementioning

confidence: 99%

Parameter Identification by Statistical Learning of a Stochastic Dynamical System Modelling a Fishery with price variation

Auger¹,

Pironneau²

2020

Comptes Rendus. Mathématique

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Can overexploited fisheries recover by self-organization? Reallocation of fishing effort as an emergent form of governance

Cited by 33 publications

References 37 publications

Evidence for spatiotemporal shift in demersal fisheries management priority areas in the western Mediterranean

Evidence for spatiotemporal shift in demersal fisheries management priority areas in the western Mediterranean

Artificial reefs: a double-edged fishery management tool

Parameter Identification by Statistical Learning of a Stochastic Dynamical System Modelling a Fishery with price variation

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