Regional Fisheries Management Research Articles

The Use of Image‐Based Data and Abundance Modelling Approaches for Predicting the Location of Vulnerable Marine Ecosystems in the South Pacific Ocean

ABSTRACTVulnerable marine ecosystems (VMEs) are typically fragile and slow to recover, thereby making them susceptible to disturbance, including fishing. In the high seas, the United Nations General Assembly (UNGA) requested regional fishery management organisations (RFMOs) to implement measures to prevent significant adverse impacts on VMEs. Here, we predict spatial abundances of 15 taxa, 13 VME indicator taxa, in the South Pacific RFMO (SPRFMO) area. Models used seafloor imagery data, an important advance on previously developed presence‐only predictions, to provide information on spatial variation in taxa abundance that is crucial for better inferring likely location of VMEs, rather than just distribution of VME indicator taxa. Abundance models varied in predictive power (mean R2 ranged 0.02–0.40). Uncertainty estimates of model predictions were developed to inform future spatial planning processes for conservation and management of VMEs. Using the VME index concept, abundance model outputs and previously published presence‐only model predictions were weighted using vulnerability scores, to explore how modelled outputs could provide spatial estimates of likely VME distribution. Spatial predictions of abundance improved on previous modelling to provide an almost complete suite of abundance models for VME indicator taxa in the western portion of the SPRFMO Convention area. Nevertheless, to improve utility of modelled outputs, we recommend more high‐quality seafloor imagery data be gathered within the SPRFMO Convention area to (1) validate abundance models developed here with independent data from the model area, (2) update models, if necessary, (3) link abundance information to ecosystem function and (4) explore validity of the adapted VME index approach used here.

Assessing Codend Mesh Selectivity: Comparing Diamond and Square Mesh Codend in the Red Sea Shrimp Trawl Fishery of Saudi Arabia

This study assessed catch composition, size selectivity, and fishing efficiency of demersal trawls targeting penaeid shrimp species in the Red Sea. It first compared the currently used diamond mesh codends in two fishing areas, Al Qunfudhah and Jazan, and then compared alternative square mesh codends to diamond mesh codends in Jazan. A total of 33 valid hauls were conducted in 2023, yielding 10,869 kg of total catch. The results showed that the square mesh codend significantly improved size selectivity, particularly for Penaeus semisulcatus and Metapenaeus monoceros, with L50 (50% retention length) values closer to their size at first maturity. The fishing efficiency indicators revealed a reduced retention probability for undersized individuals with square mesh codends. Additionally, bycatch discard rates decreased, indicating potential benefits for ecosystem conservation. This study suggests incorporating square mesh codends into fishery management regulations to enhance size selectivity and reduce bycatch during Red Sea shrimp trawling. Establishing a legal minimum landing size requirement is recommended to complement these efforts and promote sustainable fishing practices.

Can automatic measuring replace humans when evaluating a shrimp fishery?

Size measurements of fish and crustacean species play a critical role in fishery stock assessments, fishing gear size selectivity studies, and monitoring compliance with fisheries management regulations. One such example is from shrimp fisheries where samples of trawl-caught shrimps are frequently collected and size measured. However, the manual measurement of hundreds of small shrimps per sample is time-consuming and exhausting. Therefore, this study evaluates whether an automatic measuring procedure using off-the-shelf camera technology and a general-purpose artificial intelligence algorithm can replace manual measurements of deep-water shrimp (Pandalus borealis). Despite some deviations between manual and automatic measurements for individual shrimps, the automatic method proved sufficiently accurate for stock, gear selectivity and compliance assessment. Furthermore, this study demonstrated how a use-case driven approach can be applied when evaluating whether a new measuring technology can replace an existing.

The complete mitochondrial genome of Chilean Jack Mackerel, Trachurus murphyi Nichols, 1920 (Teleostei, Carangidae)

The Chilean jack mackerel (Trachurus murphyi, Nichols, 1920) is a pelagic fish of high fishery interest, with a global capture of 828,358 mt in 2021. We report the complete mitochondrial genome of T. murphyi (Teleostei, Carangidae), collected in Bahia de Zapallar, Chile (32°33’02.59’’ S, 71°27’55.38’’ W). The size of the mitogenome is 16,561 bp (H-strand composition: 25.9% A, 16.7% C, 29.8% G, and 27.5% T). The mitogenome has the classic vertebrate gene content of 13 protein-coding, two rRNA, and 22 tRNA genes, as found in Carangidae and other Teleostei families. Phylogenetic analysis using mitochondrial genomes of 22 related species revealed that T. murphyi formed a well-supported monophyletic group with the other Trachurus species, being T. simmetricus its closest relative. Sequencing the mitochondrial genome from T. murphyi is the first step in developing traceability tools based on DNA analysis to enforce fishing quotas and trace the processed food and foodstuff containing Chilean jack mackerel following the objective of the South Pacific Regional Fisheries Management Organization (SPRFMO).

Optimising the review of electronic monitoring information for management of commercial fisheries

Electronic monitoring (EM) systems incorporating cameras and other devices can collect a broad range of data to support fisheries management. We reviewed the data collection capabilities of EM and considered approaches to increasing efficiency, including cost effectiveness, of EM review. EM can provide information on catch, effort, catch handling, bycatch mitigation, fishing gear and operational data, which are relevant for fisheries management including by Regional Fisheries Management Organisations (RFMOs). Methods to increase efficiency and decrease costs of EM review apply from the programme design phase, through data collection and review. At review, costs may be reduced by sampling imagery optimally to meet monitoring objectives. Considering RFMOs as users of EM-collected information, we applied EMoptim, an open-source simulation model developed in R that estimates the amount of EM review necessary to meet one or more user-specified monitoring objectives. EMoptim uses stratification to increase review efficiency and incorporates a function to explore review costs against the monitoring objectives set. We evaluated the amount of EM review needed to estimate catch with specified precision, using fishery data available from the Western and Central Pacific Fisheries Commission. Model outputs show that EM review requirements increase as catch frequency decreases, dispersion of catch events increases, and when more precise catch estimates are required. Geographical stratification reduced the amount of review required for more commonly caught species and when catch events were focused in a limited area. Optimising review rates across multiple monitoring objectives was most effective for more commonly caught species. We highlight opportunities for future use and development of this prototype modelling package.

Synthesising a network of evidence on a seabird bycatch mitigation measure

AbstractRobust estimates of the relative efficacies of alternative management interventions are essential for developing evidence‐informed fisheries bycatch policy. Bycatch is a major threat to the conservation of albatrosses and other pelagic seabirds. Branchline weighting is one approach prescribed by regional fisheries management organisations and the Agreement on the Conservation of Albatrosses and Petrels to reduce seabird bycatch in pelagic longline fisheries. We used a Bayesian multilevel network meta‐regression modelling approach to conduct the first synthesis of available evidence to assess the relative efficacies at mitigating seabird bycatch of alternative pelagic longline weighting designs. Unlike conventional pairwise meta‐analysis, network meta‐analysis enables the simultaneous comparison of multiple interventions within a coherent modelling framework. There was a > 97% probability that all weighting designs significantly reduced seabird bycatch compared to a reference design with no weight within 5 m of the hook. Nonetheless, some weighting designs were significantly more effective at reducing seabird bycatch than others—for instance, the 2 designs with weights >60 g and >1 m from the hook performed the best with >93% probability that those 2 designs performed significantly better than 2 more commonly used designs with less weight but attached closer to the hook. These two best performing designs reduced seabird bycatch by ca 89% relative to the reference design. These relative efficacies and rankings, when combined with other performance criteria such as costs to commercial viability and crew safety, support robust evaluations of alternative bycatch management strategies.

International Legal Regulation of Biodiversity Conservation in Northern Latitudes (Part 2)

International scientific and technical cooperation is critically important for making effective decisions and measures to manage Arctic biodiversity. The 2017 Agreement on Strengthening International Arctic Scientific Cooperation creates a solid legal basis for intensifying current and designing new scientific research in order to obtain the best scientific data as a basis for conservation and resource management. The basis of the international legal regime for the conservation and management of biodiversity beyond national jurisdiction in the Arctic is the 1982 UN Convention on the Law of the Sea. International legal acts on fisheries regulation have been adopted for all four areas of the high seas in the Arctic. The study of the Agreement on the Prevention of Unregulated Fishing on the High Seas in the central part of the 2018 SLA revealed significant shortcomings: when determining the spatial scope of application, an ecosystem approach is not used; a precautionary approach to fishing is not taken into account; the basis for the creation of a regional fisheries management organization is not created; the issue of fishing by third States remains open. The Agreement on the Conservation and Sustainable Use of Marine Biological Diversity in Areas Beyond National Jurisdiction 2023 develops a number of institutions, including IOE and EIA. An analysis of its provisions indicates the inexpediency of Russia’s participation in it, taking into account the existence of the 2017 Agreement and a significant system of organizations involved in the implementation of joint marine research projects. The 2023 Agreement is not capable of having a significant positive effect on international cooperation in the conservation of Arctic biodiversity, but on the contrary will create additional obstacles to scientific research and impose financial burdens.See the beginning: Lex russica. 2024;77(8):112-129. (In Russ.). DOI: 10.17803/1729-5920.2024.213.8.112-129.

Enhancing the adaptive capacity of fisheries to climate change: Bridging academic theory and management practice through practitioner interviews

Climate change is dramatically altering the environmental context in which marine resources are harvested and managed. A growing field of academic literature has begun to explore the adaptive capacity of fishers and managers to respond to this change, but much of this field is abstract and theory-driven. Therefore, it is unclear whether this literature accurately reflects the adaptation priorities of fishery management practitioners, or whether there are gaps in the literature that these practitioners could fill with on-the-ground knowledge. Second, even if these principles of adaptive capacity are perfectly aligned with management practitioners’ priorities, it is unclear to what extent these principles are actively considered in the decision making process, and if not, why. This study seeks to address these questions by confronting fisheries professionals with academic ideas around adaptive capacity through a series of semi-structured interviews with federal fishery managers and scientists whose work informs decision making in the United States regional fishery management system. The study then uses these interviews to identify three low-cost, high-impact action items that could make concepts from the academic literature more accessible and useful to these practitioners and expand the literature by incorporating practitioners’ expertise. These action items are: 1) distinguish adaptive capacity from adaptive management, 2) use practitioner insights to contextualize the elements of adaptive capacity within the constraints and opportunities of governance systems, and 3) expand academic research to explicitly consider the capacity to adapt on appropriate timelines given the scale and pace of systemic change.

The use of corrective action frameworks in international fisheries management

Compliance frameworks are important to promoting sustainable management of shared fisheries resources through the robust and transparent assessment of the implementation of conservation measures by States that are party to international agreements. This paper provides a review of existing compliance frameworks, with a special focus on corrective actions to respond to non-compliance in regional fisheries management organisations or arrangements, as well as a selection of multilateral environmental organisations. The analysis of the surveyed schemes of corrective actions identifies common themes and practices, which can provide a foundation on which to support the development of, or refinement of existing, schemes of corrective actions by other international organisations or arrangements.

Improving impact assessments to reduce impacts of deep-sea fisheries on vulnerable marine ecosystems

Robust impact assessments (IAs) for deep-sea fisheries are essential for safeguarding deep-sea ecosystems against the impacts of bottom fishing. In the high seas, United Nations Resolution commitments require States (independently or through Regional Fisheries Management Organisations (RFMOs)) to conduct IAs to evaluate if fishing is putting vulnerable marine ecosystems (VMEs) at risk. To enhance the efficacy of future IAs, this study evaluated nine IAs against the criteria in the FAO International Guidelines for the Management of Deep-Sea Fisheries in the High Seas. We find that in all IAs, the information required by the FAO Guidelines is either completely lacking or only partially addressed. The main shortcoming of the IAs was inadequate description of the ecosystems potentially affected by fishing. Additional shortcomings include incomplete description of the proposed fishing activities, lack of baseline data and risk assessments, and limited consideration of the indirect impacts of fishing. This study identifies several ways to strengthen the IA process; i) making IAs publicly available; ii) improved collection of baseline data and VME identification; iii) assessment of impacts on broader range of species associated with VMEs or potentially impacted by deep-sea fishing; iv) enhanced cooperation between RFMOs and more streamlined IA processes; v) comprehensive assessment of different types of impacts from fishing and climate change, and vii) improved consideration of uncertainty. Fully compliant IAs are a minimum requirement for the effective function of RFMOs, since they are the primary tool for preventing significant adverse impacts upon vulnerable marine ecosystems and the wider deep-sea environment.

Management strategy evaluation operating model conditioning: a swordfish case study

Evaluation of fish stock status is a key step for fisheries management. Tuna Regional Fisheries Management Organizations (t-RFMOs) are moving towards management strategy evaluation (MSE), a process that combines science and policy and depends on technical aspects, developed by scientists, designed to meet management objectives established by managers and other stakeholders. In the Indian Ocean, the current management advice for swordfish (Xiphias gladius) is based on an ensemble of 24 models considering four areas of uncertainty about the stock dynamics. There is an ongoing MSE process for swordfish, and this paper describes the methodology being applied for the conditioning of the operating model (OM), including model selection and validation. In the MSE, nine sources of uncertainty were considered, each being characterized by 2–3 levels. A partial factorial design was employed to reduce the number of models from a full factorial design to those needed to encompass the overall uncertainty. A selection and validation process was carried out, filtering models that converged, showed good predictive skills, and provided plausible estimates. Overall, the estimated spawning stock biomass (SSB) relative to SSB at maximum sustainable yield (MSY), and fishing mortality (F) relative to FMSY encompasses the estimates of the stock assessment ensemble at the most optimist area of the distribution. The MSE for swordfish is an ongoing process that is expected to provide more robust management advice in the future. Further developments to the OM can still occur, but the methods presented herein can be applied to this, or other species, MSE processes.

Recent Developments in the European Union’s Involvement in Mediterranean Fisheries Management

Abstract This article examines the attention that the European Union (EU) currently pays to fisheries management in the Mediterranean Sea. The Union’s action in this marine area is complex. On the one hand, the EU is present through its Common Fisheries Policy, as the coast of eight Member States border the Mediterranean Sea. On the other hand, the EU cooperates with the other Mediterranean countries through its European Neighbourhood Policy as well as with two regional fisheries management organisations with a mandate over Mediterranean living marine resources, namely, the General Fisheries Commission for the Mediterranean, and the International Commission for the Conservation of Atlantic Tunas.

Emergent geopolitical risks from fishing activities and past conflicts in the Pacific Ocean

Pacific Ocean longline fisheries support numerous international fleets targeting various species. However, global fishing activities has increased the density of vessels flagged to different countries fishing near each other. Such spatial competition increases the risk of fisheries conflicts by potentially introducing resource sharing, gear interactions, or territorial disputes. As international fisheries conflicts increase and fishing patterns evolve, it is important to know who is fishing nearby whom, and where. Enduring rivalries, or countries with historical disputes, can also contribute to a cycle of future conflicts. Here, we use network and geospatial analyses to examine which countries, country pairs, and regions in the Pacific Ocean may be at an elevated risk of fisheries conflict from spatial competition and enduring rivalries. Certain countries dominate fishing activities: Taiwan and Chinese-flagged vessels fish the largest area at 64 million km2 each (33 % greater than the next ranked country), with 7.9 and 7.2 million fishing hours respectively (nearly 2 times greater than the next ranked country). These countries and others (Japan, United States, South Korea) rank among the highest in conflict risk because of large overlapping fishing areas with enduring rivals. International diversity is most widespread in the tropical Pacific, though highest in the south Pacific, reflecting international participation in tropical bigeye and yellowfin fisheries and south albacore fisheries. High-risk regions primarily occur in the tropical Pacific across jurisdictions and similarly appear influenced by regional fisheries management. Overall, our research takes an international-level approach to study how spatial and temporal interconnectedness may influence conflict risk.

Provisions for nullification of conservation and management measures in RFMO objection procedures

In order to successfully exercise their mandate to adopt binding conservation and management measures (CMMs) for straddling and highly migratory fish stocks, regional fisheries management organizations (RFMOs) and arrangements (RFMAs) need effective decision-making procedures. The constitutive instruments of a considerable number of such bodies contain objection procedures which allow individual members to unilaterally opt-out of an adopted CMM. Most scholars and RFMO performance review panels consider that unconstrained unilateral objection procedures undermine the decision-making procedures of both RFMOs and RFMAs. This article examines the phenomenon of CMM nullification provisions, which are present in five RFMOs. Such provisions deprive adopted CMMs of their binding force for all members if a certain number of members of the RFMO object to the CMM. This article argues that there is a case for a phase-out of CMM nullification provisions together with the unilateral objection procedures to which they are closely tied. Compared to unilateral objections more generally, CMM nullification provisions raise additional legitimacy questions given that they result in the nullification of CMMs that have been democratically adopted in conformity with the legitimate decision-making procedures of the respective RFMO. This article first provides a brief overview of the rationale for objection procedures by placing the concept of objections in the broader context of RFMO decision-making. Thereafter, this article briefly examines the requirements and legal effects of individual objections of RFMO members to CMMs. The final substantive section analyzes and compares existing CMM nullification provisions, focusing on the requirements for their activation, the nature of their legal effects and the legitimacy of such procedures considering the broader decision-making procedures of individual RFMOs.

Vertebral chemistry distinguishes regional populations of Blacktip Sharks in the northern Gulf of Mexico

AbstractObjectiveUnderstanding the spatial connectivity of elasmobranch populations is critical for regional fisheries management. The Blacktip Shark Carcharhinus limbatus is abundant in coastal waters of the Gulf of Mexico (GoM) and important in recreational and commercial fisheries. Based on genetic and tagging studies, GoM Blacktip Sharks are currently managed under separate quotas between the eastern and western GoM (divided at 88°W), but no studies have used vertebral chemistry to assess the population structure of adult Blacktip Sharks.MethodsWe compared vertebral elemental signatures (barium [Ba], magnesium [Mg], manganese [Mn], strontium [Sr], and zinc [Zn]) for the first year of life with last occupied habitats (vertebral edges) in Blacktip Sharks collected from the western (Texas and Louisiana) and eastern (Alabama and Florida) coastal waters of the northern GoM.ResultWe found significant regional differences in Ba, Mg, Mn, and Sr vertebral edge signatures, suggesting ecological separation of Blacktip Sharks. Significant correlation between first‐year and edge signatures suggested a high degree of residency between life stages. Cross‐validated discriminant function analyses yielded highest regional classification accuracies when Florida sharks were grouped separately west of 88°W (90%), demonstrating the unique elemental signatures of eastern versus western GoM Blacktip Sharks under current management delineations.ConclusionCombined, these findings demonstrate that trace element markers can distinguish regional populations of Blacktip Sharks and provide a complimentary approach in addition to genetics and physical tagging to support current stock management efforts.

Global habitat predictions to inform spatiotemporal fisheries management: Initial steps within the framework

Tuna Regional Fishery Management Organizations (tRFMOs) are increasingly interested in spatiotemporal management as a tool to reduce interaction rates with vulnerable species. We use blue shark (Prionace glauca) as a case study to demonstrate the critical first steps in the implementation process, highlighting how predictions of global habitat for vulnerable life stages can be transformed into a publicly-accessible spatial bycatch mitigation tool. By providing examples of possible management goals and an associated threshold to identify essential habitats, we show how these key areas can represent a relatively low percentage of oceanic area on a monthly basis (16–24% between 50°S and 60°N), yet can have relatively high potential protection efficiency (∼ 42%) for vulnerable stages if fishing effort is redistributed elsewhere. While spatiotemporal management has demonstrable potential for blue sharks to effectively mitigate fishing mortality on sensitive life stages, we identify inherent challenges and sequential steps that require careful consideration by tRFMOs as work proceeds. We also discuss how our single-species framework could be easily extended to a multispecies approach by assigning relative conservation risk before layering habitat model predictions in an integrated analysis. Such broader application of our approach could address the goals of tRFMOs related to reducing the ecosystem effects of fishing and pave the way for efficient fisheries co-management using an ecosystem-based approach.

Innovation in the quest for compatibility: Interplay of jurisdiction and allocation in the South Pacific Regional Fisheries Management Organisation

This paper explores how the legal obligation that management measures for straddling stocks in the high seas and for areas under national jurisdiction must be ‘compatible’ is interpreted within the forum of Regional Fisheries Management Organisations, by considering the example of the ongoing conflict over allocation of jack mackerel (Trachurus murphyi) managed by the South Pacific Regional Fisheries Management Organisation (SPRFMO). To do so, the paper presents the innovative framework through which to realise compatibility set forth by the treaty instituting SPRFMO, the Convention on the Conservation and Management of High Seas Fishery Resources in the South Pacific Ocean, together with the practice implementing these provisions as seen in the annual SPRFMO jack mackerel management measure. This measure has evolved as coastal States Chile and Ecuador have consented over time to apply the measure in the areas under their national jurisdiction, and as it has been used to urge coastal State Peru to ensure measures under its area of jurisdiction are compatible with those in the SPRFMO measure. Methodologically, the paper draws from a mix of doctrinal analysis of international treaties alongside document analysis of SPRFMO Commission meeting reports, management measures, and reports of the SPRFMO Review Panel, enriched through interviews with persons with experience of the workings of SPRFMO. Ultimately, the paper grapples with the challenges in interpreting and applying the legal obligation of compatibility within the political context of allocation decisions by a Regional Fisheries Management Organisation such as SPRFMO.

A new approach to combating illegal, unreported, and unregulated fishing: analysis of the WTO Agreement on Fisheries Subsidies

Harmful subsidies awarded by states facilitate illegal, unreported, and unregulated (IUU) fishing, which causes negative impacts on ocean ecosystems, seafood value chains, society, and global food security. The World Trade Organization Agreement on Fisheries Subsidies, adopted on June 17, 2022, aims to improve global fishery governance through trade measures and is regarded as a major step toward the achievement of the United Nations 2030 Sustainable Development Goals. The objective of this study is to offer a better insight into the interpretation and future implementation of the WTO Agreement on Fisheries Subsidies. Based on the status quo of international and regional fishery governance legal systems and management regimes in the regulation of IUU fishing, this study reviews the legislative process of the WTO Agreement on Fisheries Subsidies, analyzes five main controversial issues, and explores the conflicts of interests of different countries during the discussion. In the future, states should promote the transformation of the fisheries sector by reducing harmful subsidies for IUU fishing and enhancing cooperation among coastal states, flag states, port states and relevant RFMOs.

Recent Declining Trends in Pelagic Fish Catches in the Indian Ocean off Sri Lanka: Is Gill Oxygen Limitation Theory (GOLT) a Possible Explanation?

Recent trends in the pelagic fish landings of multi-day fishing fleets operated from Sri Lanka indicated significant declines in many fish species. Therefore, the present preliminary analysis investigates the perceptions of fishers on recent declining trends of pelagic fish landings from offshore areas of the Indian Ocean and further investigates whether the most common pelagic species landed in Sri Lanka conform to the gill oxygen limitation theory (GOLT) and to speculate GOLT as a possible explanation to such trends. According to the perceptions of 457 skippers of fishing vessels interviewed, such declines were possibly attributed to shifting of the areas of occurrence of pelagic fish species, making them less vulnerable to multi-day fishing vessels. As climate change and deoxygenation are major stressors affecting fish stocks, there is a challenging need for disentangling the impacts of these stressors from the effects of overfishing. The 18 most common pelagic fish species harvested from the Indian Ocean confirmed to the predictions from the GOLT, suggesting that shifting of these stocks could be due to deoxygenation which may have been triggered by increased sea surface and sub-surface temperatures. Therefore, fishery-independent surveys are needed to investigate the shifting of areas of occurrence of pelagic fishes in the Indian Ocean to understand their areas of occurrence the further investigate the relevance of GOLT for defining regional fisheries management plans.

Integration of spatial justice into navigating the combat on illegal, unreported and unregulated fishing in ocean and coastal areas

As a geographical dimension of justice, spatial justice is characterized by the interplay of social justice and heterogeneous spaces, including the ocean. Despite the generous contribution of ocean to humankind, concerns over aquatic spatial justice are disproportionately lacking. Among the core disruptors of ocean justice, illegal, unreported and unregulated (IUU) fishing imposes a major threat to global fisheries governance. The synthesis of spatial analysis and justice perspective can generate new insights to help understand and potentially address IUU fishing. To examine the spatial (in)justices concerning IUU fishing, we first propose a novel tripartite framework that envisions space as a form of opportunity, society and rights to externalize its socio-environmental implications. Then we integrate productive, distributive and consumptive justices to examine the spatial variations of IUU stakeholders along the fish value chain, and use stakeholder analysis to investigate spatial powers and conflicts regarding both a micro scale of fish communities, and a macro scale of states (coastal state, flag state, port state and market state) and supernational players (regional fisheries management organizations and marine protected areas). It is discovered that certain regions provide greater spatial benefits that stimulate IUU behaviors; IUU misconducts cause spatial differentiation and spatial deprivation that disrupt social orders in fish communities; space can empower stakeholders’ inclusive and proper engagement into the place-based management process against IUU fishing. Since the spatialized vision has been increasingly highlighted in marine fisheries management, it is suggested to intervene in the world ocean by leveraging spatial knowledge, managing spatial conflicts and facilitating spatial action, in order to promote spatial justice and better combat IUU fishing globally.