Guest Blog: Building Capacity for Management Strategy Evaluation within the North Pacific Fisheries Commission

The North Pacific Fisheries Commission (NPFC)  is a relatively new Regional Fisheries Management Organization (RFMO) with the overarching objective of ensuring the long-term conservation and sustainable use of the fisheries resources in its Convention Area while protecting the marine ecosystems of the North Pacific Ocean.

Having participated in preparatory meetings before this RFMO was ratified in 2015 and chaired its Scientific Committee for the past five years, I have observed the NPFC’s Scientific Committee establish defensible processes for undertaking quantitative analyses, including stock assessments, and providing science-based advice to the Commission to achieve its overarching objective.

During the past decade, NPFC Members have collaborated on stock assessments of two priority species – Pacific saury (Cololabis saira) and chub mackerel (Scomber japonicus) – and have been studying other NPFC priority species. The NPFC adopted an interim harvest control rule (HCR) for Pacific saury in 2024 based on preliminary simulation testing, while a full management strategy evaluation (MSE) is developed for that species.

The NPFC’s Scientific Committee has been learning about and building capacity to develop MSE for its priority species since 2019, when its Biological Reference Point/Harvest Control Rule/Management Strategy Evaluation Workshop was convened to consider potential directions on the application of biological reference points (BRPs), HCRs, and MSE for NPFC’s priority species. During that workshop, one invited expert described how conducting an MSE can be a lengthy process. Still, the lessons learned from conducting it for one species can be transferred to others, making future MSE processes more efficient. Another invited expert underscored the importance of improving communication for more effective MSE processes. Participants also noted that consideration could be given to the role of climate variability when providing scientific advice because MSE is a robust tool to evaluate the resilience of HCRs to different climate scenarios.

In 2021, the NPFC established a Small Working Group on MSE for Pacific Saury (SWG MSE PS) as a joint subsidiary body that included participation from its Scientific Committee, Technical and Compliance Committee, and Commission (joint SC-TCC-COM SWG MSE PS). The overall purpose of the SWG MSE PS is to provide a forum for consultation and cooperation among scientists, managers, stakeholders, and observers, akin to the science-management dialogue groups in use at other RFMOs. The SWG MSE PS’ functions include developing and submitting recommendations to the Commission on a draft interim HCR, draft management objectives, key sources of uncertainty, and, if feasible, candidate management procedures (MPs), as well as facilitating communications among commissioners, scientists, managers, stakeholders, and observers.

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MSE Workshop participants from the NPFC’s Scientific Committee and Secretariat are getting set up to learn about openMSE in December 2024

In anticipation of future participation of the NPFC’s Scientific Committee in MSE processes for priority species, the Scientific Committee has been exploring options to build capacity to undertake the technical analyses that underpin MSE. Recently, the Scientific Committee and the NPFC Secretariat accepted the offer from The Ocean Foundation and www.HarvestStrategies.org to organize an informal workshop on management strategy evaluation with the OpenMSE R package. The workshop side-event was led by Dr. Tom Carruthers and Dr. Adrian Hordyk of Blue Matter Science in December 2024 on the margins of the Scientific Committee’s ninth meeting. The first part of this workshop focused on introducing the philosophy, concepts, and terminology of MSE. The second part of the workshop was a demonstration (coding) of the technical components of MSE using the OpenMSE R package, including operating model specification, MP development and tuning, running the closed-loop calculations of an MSE, calculating performance metrics, presenting MSE performance outcomes and trade-offs, and developing exceptional circumstances protocols. Over 20 people from the NPFC’s Scientific Committee or Secretariat registered for this hybrid workshop.

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Dr. Tom Carruthers introduces the philosophy, concepts, and terminology of MSE

Given the NPFC’s Resolution on Climate Change, which tasks its Scientific Committee with integrating analyses of climate change relevant to NPFC fisheries into its work plan, Dr. Carruthers was also invited to present tools for incorporating climate change considerations into scientific advice. His presentation suggested that it is unnecessary to know the exact type or level of forecasted impact to identify an MP that outperforms other MPs in terms of climate robustness. He also presented how the climate robustness of MPs can vary depending on their specification.

Drawing on NPFC Scientific Committee funds for capacity building, Dr. Libin Dai of China will spend a week in early 2025 working with those at Blue Matter Science in part to develop a stock assessment model for neon flying squid, learn more about applications of the openMSE R package for NPFC’s priority species, and learn about integrating climate information into a stock assessment framework and MSE for neon flying squid.

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Dr. Libin Dai, vice-chair of the NPFC’s Small Scientific Committee on Pacific Saury, will visit Blue Matter Science to learn more about integrating climate variability into stock assessment and MSE.

I am heartened to know that NPFC Members and observers recognize the importance and value of MSE in informing fisheries of priority species management, especially when considering MPs that are resilient to the impacts of climate change. This is also related to two key recommendations (3.2.2 and 4.5.4) of the 2022 NPFC performance review. The NPFC is actively building knowledge and capacity within its scientific and management communities to understand and undertake the analyses needed to inform MSE processes. To this end, The Pew Charitable Trusts and The Ocean Foundation are convening a side event during the ninth NPFC Commission meeting that will explore further opportunities for the NPFC to build its capacity. I look forward to a day in the near future when scientists can communicate and work effectively with managers and stakeholders to implement NPFC MPs that can meet multiple objectives of sustainable use.

Dr. Janelle Curtis is a Research Scientist at Fisheries and Oceans Canada. She has been chairing the NPFC’s Scientific Committee since April 2019.


How to Involve Stakeholders and Local Communities in MP and MSE Development (2025)

20×25: Big opportunity to advance management procedures this year

Here at www.HarvestStrategies.org, the New Year’s resolution is always to catalyze the development and adoption of robust management procedures (MPs) for fisheries around the world. 2024 saw impressive progress, with MP adoption for North Atlantic swordfish, Indian Ocean swordfish and skipjack, North Pacific saury, and Adriatic Sea anchovy and sardine.  Notably, these are the first MPs for swordfish and forage fishes adopted by regional fisheries management organizations (RFMOs), marking a significant step forward in applying a broader ecosystem approach. These 5 adoptions brought the total number of MPs for internationally managed stocks to 15. If we make that kind of progress again this year, adding 5 more adoptions, we’ll have 20×25 – 20 total international MPs by 2025. 

There are 11 stocks slated for MP adoption this year, so securing 5 is a realistic goal, regardless of the challenges of consensus-based management at the RFMOs. Here are the stocks we’re tracking this year in chronological order.

  • January: Pacific halibut at the International Pacific Halibut Commission (IPHC) – The IPHC met in Vancouver, Canada, last week to discuss finalizing the Pacific halibut interim harvest strategy policy, which they have been operating under since 2019. They agreed last week to adopt a final MP in mid- to late-2025.
  • February: Jack mackerel at the South Pacific Regional Fisheries Management Organization (SPRFMO) – The jack mackerel management strategy evaluation (MSE) has been in development for over 5 years and has comprehensively tested a suite of potential MPs. There is no MP proposal posted yet, but a workshop on the MSE on February 15th before the annual meeting could at least finalize management objectives to narrow the scope of the MSE and make progress toward MP adoption no later than 2026.
  • April: Albacore tuna at the Indian Ocean Tuna Commission (IOTC) – The albacore MSE will be completed as early as next month, allowing presentation at IOTC’s science-management dialogue group (SMD), the Technical Committee on Management Procedures, followed by MP adoption at the annual meeting.
  • July: Pacific bluefin tuna at the Joint IATTC-WCPFC Working Group (JWG) – The JWG will meet in Monterey, California, this week to provide feedback on the preliminary MSE results. Several MP options will lock in recovery and long-term sustainability for this stock, which depleted to 2% of unfished levels just a decade ago.
  • September: Bigeye tuna at the Inter-American Tropical Tuna Commission (IATTC) – With MSE workshops in March and May and a science meeting in June, the IATTC is well-positioned to adopt its first tropical tuna MP this year.
  • September: Redfish at the Northwest Atlantic Fisheries Organization (NAFO) – NAFO adopted the first two MPs for any internationally managed stocks and is on track to adopt its third this year. 3LN Redfish will join Greenland halibut and 3NO Atlantic cod, facilitated by NAFO’s effective science-management dialogue group, the Working Group on Risk-Based Management Strategies.
  • November: Blackspot seabream at the General Fisheries Commission for the Mediterranean Sea (GFCM) – GFCM adopted its first MSE-tested MPs last year, as mentioned above. It’s now nearing completion of a blackspot seabream MSE, with MP adoption slated for the annual meeting in November. The MP is expected to recover the long-overfished stock, good for people in Morocco and Spain who rely on this fishery.
  • November: North Sea herring at the Northeast Atlantic Fisheries Commission (NEAFC) – ICES is putting the finishing touches on its MSE for North Sea herring, with the help of independent reviewers, putting NEAFC on track to adopt its first MP this year.
  • November: Western skipjack tuna at the International Commission for the Conservation of Atlantic Tunas (ICCAT) – ICCAT all but adopted an MP for western skipjack last year, paving the way for adoption this year once the MSE is revised to incorporate some Commission feedback on the preliminary results.
  • December: South Pacific albacore – and bigeye tuna – at the Western and Central Pacific Fisheries Commission (WCPFC) – WCPFC was poised to adopt an MP for South Pacific albacore last year, but unfortunately none of the member governments submitted a proposal. WCPFC’s workplan now includes MP adoption for albacore and bigeye this year.

If we hit the 20×25 target, the number of international MPs will have doubled in two years — evidence of the tremendous progress in MP development. With even more internationally managed stocks slated for MP adoption in 2026, the tide is turning toward a future where MSE-tested MPs will bring a more transparent, predictable, and science-based approach to achieving long-term abundant and sustainable fisheries.

Needless to say, there’s a lot of work to be done this year. Please check back here regularly to see how 20×25 unfolds!

ICCAT Advances Management Procedures for 8 Key Stocks

The ICCAT annual meeting wrapped up on Monday in Limassol, Cyprus. Management procedures (MPs) were the big winners of the meeting, with progress made on eight different stocks. This remarkable advancement affirmed ICCAT’s commitment to transitioning its management to MPs as a more science-based and transparent approach to achieving long-term sustainability for its $5.4 billion fisheries.

North Atlantic Swordfish: A Landmark Success

An MP was adopted for North Atlantic swordfish, marking ICCAT’s first MP for a non-tuna species. Twenty-five years ago, there was a boycott of North Atlantic swordfish, given its dire status. Today, the stock is fully recovered, and the new MP will lock in this abundance and ensure a vibrant fishery for years to come. The MP was also evaluated to ensure that it can be responsive to any negative impacts of climate change on swordfish abundance, ensuring a sustainable system even in a changing ocean.

The northern swordfish catch limit will increase by 12% next year, the first catch increase for swordfish since 2002. Importantly, the adopted MP is called “MCC,” which stands for “Mostly Constant Catch,” as it is designed to secure long-term stability in the fishery, which is good for business, both on fishing vessels and in seafood markets.

West Atlantic Skipjack: Significant Progress Despite Delay

While we had hoped an MP would be adopted for West Atlantic skipjack, ICCAT members decided that they needed a bit more information before selecting a specific MP. They, therefore, stopped just short of MP adoption, finalizing operational management objectives and giving clear guidance on how to put the finishing touches on the management strategy evaluation (MSE), the results of which will determine the MP to be adopted next November. This still remarks tremendous progress and is cause for celebration.

Forward Momentum for Other Important Stocks

ICCAT also agreed to interim management objectives for the other three tropical tunas – bigeye, yellowfin, and East Atlantic skipjack. The new measure contains important information to guide and reinvigorate the multispecies MSE underway for those stocks, calling for MP adoption in 2026. We note that the 50% probability of having each of the stocks not overfished and not subject to overfishing is a minimum standard for MP development, and we will work with ICCAT members to ensure that the likelihood is raised to at least 60% for the final MP. A coin flip’s chance of success is insufficient, especially given the number of livelihoods and coastal communities that depend on these stocks.

South Atlantic albacore and North and South Atlantic blue sharks round out the list of MP actions, with objectives agreed upon for the former and all three stocks added to ICCAT’s MSE workplan.

Charting a Sustainable Future

The outcomes of the Cyprus meeting reaffirm ICCAT’s leadership in global fisheries management. By adopting a new MP and providing guidance on MP development for 7 other stocks, ICCAT is charting a path toward more sustainable and resilient big fish fisheries. The Commission is well-positioned to secure the long-term health of these key resources and the communities that depend on them. The coming year will be pivotal as these initiatives take shape, and we at www.HarvestStrategies.org look forward to continuing to engage as a stakeholder in the process.


Webinar: Harvest Strategies 101・漁獲戦略の紹介 ・你不可不知的漁獲策略 「中国語、日本語、韓国語の通訳あり」(2024) 🇯🇵

Guest Blog: Building Capacity and Ensuring Compliance – My Journey with Harvest Strategies

When I first delved into the world of harvest control rules and harvest strategies in 2011 during my time with WWF as their global tuna lead, I saw it as a critical opportunity to ensure sustainable fisheries. At the time, except for Southern Bluefin Tuna, none of the tuna RFMOs had established effective harvest strategies, despite the clear benefits they offered. It was a moment where the scientific community, NGOs, and some in the industry began to rally around this concept, recognizing that pre-agreed frameworks for managing fishing effort could mitigate the volatility and short-term pressures that often dominate RFMO negotiations.

A key challenge we encountered early on was the lack of understanding among stakeholders, particularly those outside the scientific realm. Harvest strategies were often perceived as a ‘black box’ solution—complex and intimidating. This is where capacity building became essential. Working on the Common Oceans Project, we hosted a series of workshops, using interactive tools to demystify harvest strategies and get participants actively involved in shaping their development. I remember one workshop vividly: participants were surprised to learn that there isn’t always a single “right” answer when mapping out a harvest strategy. Different components, such as reference points and harvest control rules, can be arranged in multiple ways, depending on the needs of specific fisheries. This flexibility is one of the greatest strengths of harvest strategies, allowing them to be tailored to the unique challenges each fishery faces.

Figuring out Harvest Strategies. Common Oceans ICCAT Workshop, Dakar, Senegal, 2018. Photo by Daniel Suddaby.

While we’ve made significant progress—tuna RFMOs have adopted several harvest control rules in recent years—the true challenge lies ahead: effective implementation. In the Indian Ocean, for example, despite adopting harvest control rules for skipjack tuna, we’ve seen significant non-compliance with recommended catch limits. Moving forward, compliance isn’t just about enforcement. It’s about fostering goodwill, ensuring all stakeholders feel invested in the long-term goals of sustainable management, and developing fair allocation systems that work for everyone involved.

Figuring out Harvest Strategies. Common Oceans ICCAT Workshop, Dakar, Senegal, 2018. Photo by Daniel Suddaby.

Monitoring and enforcement will also play a crucial role. The adoption of advanced technologies, like electronic monitoring systems and automated data analytics, will be essential to ensuring that harvest strategies work in practice. We’ve already seen fisheries adopt management procedures that integrate such tools, and it’s a model that will need to be expanded globally.

The journey of implementing harvest strategies over the past decade has been transformative. In 2014, I was thrilled to see mainstream media in the UK publish pieces on the need for harvest control rules and the European retailers demanding this—something unheard of when I began this work. Today, many of our GTA partners instantly understand the value of these strategies. This is a credit to all the capacity building that has happened. However, as we look ahead, ensuring robust compliance and continued capacity building will be critical to their long-term success.

At the Global Tuna Alliance (GTA), our global supply chain partners are deeply committed to pushing for progress in this area. Over the next five years, we will leverage our partnerships to advocate for the effective uptake and critical implementation of harvest strategies across all tuna RFMOs, ensuring that our tuna fisheries remain sustainable for future generations.


About the Author: With 20 years of experience in fisheries and marine conservation, Daniel Suddaby has a deep passion for the ocean, marine life, and sustainable fishing practices. He is an expert in tuna, advocacy, and sustainable market tools that drive change in fisheries and seafood supply chains. Prior to joining the GTA, Daniel founded and led the Tuna and Distant Water Fisheries Program at Ocean Outcomes, building effective relationships with longline tuna and supply chain companies to incentivize transformation through tools such as the Marine Stewardship Council (MSC) Fishery Improvement Projects. Previously, Daniel spent six years as the Deputy Leader of the World Wild Fund for Nature’s (WWF) global fisheries initiative, leading global engagement in tuna fisheries and advocacy in all Regional Fisheries Management Organisations (RFMOs), and providing strategic direction to WWF International on seafood engagement. He also has experience as a Senior Fisheries Certification Manager for the MSC.

Management Procedures for Small Tunas (2024)

Pacific Possible: Two RFMOs Should Lead the Way By Committing to Develop Management Procedures for Squids

Squid fisheries are some of the most important but undermanaged fisheries worldwide. Cephalopod catches, which include squids, made up about 11 percent of the global catch of marine species in 2022.

Because of their short lifespan, rapid growth, and fluctuation with changes in environmental conditions, applying traditional fisheries management approaches has been challenging. The result: important stocks of squid are being harvested without hard, science-based limits on fishing or even an understanding of the health of the resource.

The management procedure approach offers a solution to the tricky problems involved in squid management. And it could be in the Pacific, the ocean basin where more of the world’s squid is harvested than any other, where management procedures (also called harvest strategies) for squid are demonstrated on an international level.

Two regional fisheries management organizations in the Pacific, the North Pacific Fisheries Commission (NPFC) and South Pacific Fisheries Management Organisation (SPRFMO), have an express remit to manage squids. They are, in fact, the only two RFMOs with squid as a key species covered by their conventions.

This year, NPFC and SPRFMO are taking steps to improve their focus on squid sustainability, but they need to ramp up their efforts to make a lasting impact. NPFC in August held its first small scientific committee meeting focused on neon flying squid to accelerate efforts to develop the first stock assessment for that stock, whose stock status is unknown at the international level. The largest harvesters are China and Japan.

Turning south of the equator, SPRFMO’s Scientific Committee, which is about to begin its annual meeting on Sept. 30, is due to receive a report on the progress of a new task team focused on assisting in the development of SPRFMO’s first stock assessment for jumbo flying squid, whose status also is not estimated by an assessment across its range but is nonetheless being harvested within the Convention Area and members’ Exclusive Economic Zones in the amount of one million metric tons a year. That makes jumbo flying squid in the South Pacific the single largest squid fishery in the world. China is the significant harvester in the international waters, while catches in Peru’s waters are of a similar scale, with lesser catches in Chile’s and Ecuador’s waters.

Both RFMOs have plans to investigate the use of Management Strategy Evaluation (MSE) to better account for the uncertainty in key biological components of their squid fisheries, with potential plans leading to the development of harvest control rules. These aspirations are laudable, but they need to be made much more concrete and translated into actions.

To accelerate their work, members in the two RFMOs should commit to developing full management procedures, tested via MSE. They should also commit to fully sharing scientific and fleet information as necessary to better understand the dynamics of their fisheries, and create science-management dialogue groups with the resources and timelines to efficiently step through the process of developing management procedures.

If data availability problems continue, data-limited approaches should be investigated to develop the MSEs, which could test the performance of simple management procedures against the potential range of different population dynamics (as well as other uncertainties).

Amidst concerns for the global sustainability of squid stocks, with researchers finding that fishing effort on squid increased 68 percent from 2017 to 2020, NPFC and SPRFMO should seize the opportunity to demonstrate how management procedures could help chart out a more sustainable path for these important squid species, one that could be followed by other squid fisheries.

Squids are both a commercially and ecologically important species, playing an integral role in marine ecosystems as prey for swordfish, sharks, tunas, marine mammals, and seabirds. However, concerns over the declining abundance of squid and lack of management measures to safeguard these fisheries cannot be overstated. It’s imperative that NPFC and SPRFMO members advance modern, science-based fisheries management for these species by strengthening data reporting, creating science-management dialogue groups and beginning the development of management procedures.

Management Procedures Versus Traditional Fisheries Management (2024)


Introduction to Management Strategy Evaluation (MSE): Part 2 of Conversations with Blue Matter Science’s Dr. Tom Carruthers

As we continue our deep dive into Management Strategy Evaluation (MSE) with Dr. Tom Carruthers, CEO of Blue Matter Science, this second and final part focuses on the advanced perspectives and future directions that shape the evolution of MSE in fisheries management. From the integration of Ecosystem-Based Fisheries Management (EBFM) principles to the impact of climate change and technological advancements, this discussion delves into how MSE can address the complex challenges facing our ocean. With his extensive experience, Tom shares invaluable insights on stakeholder engagement, international collaboration, and the need for modern innovation.


Part 2: Advanced Perspectives and Future Directions in Management Strategy Evaluation (MSE)

Ecosystem-Based Fisheries Management

HS.org: How do you perceive the integration of EBFM principles within current MSE frameworks, and what strides must be taken to ensure a holistic approach to fisheries management that adequately protects marine biodiversity and supports the resilience of oceanic ecosystems and the sustainability of fisheries?

Tom: Ah, EBFM. Scarcely has there been a topic in fisheries of so much discussion and so little management action! A few years ago, I was asked to review the history of EBFM in fisheries. Despite many hundreds, maybe thousands of papers on the subject spanning more than 15 years, I could find evidence of only one fishery, Atlantic menhaden, where the principles of EBFM had shaped tactical management advice. 

In my view, MSE is the only existing framework that can operationalize EBFM in the routine provision of tactical advice. This is because most ecosystem models are difficult to evaluate empirically. They often struggle to pass conventional standards of peer review for models used to inform management advice. MSE is expressly designed to navigate such hypotheses, potentially ending in an adopted harvest strategy robust to hypothetical scenarios for ecosystem dynamics.

Stakeholder Engagement

HS. org: How do you involve stakeholders, including fishers and conservation interests, in the MSE process, and why is their involvement crucial?

Tom: A common reason for pursuing MSE is that the conventional stock assessment approach excludes the interests, experience, and values of the wider group of fishery participants. To many participants whose livelihoods are directly impacted by the results of stock assessments, the process can feel like a technologically complex exercise that removes all but a handful of nerdy scientists and reviewers (I am probably one of those!). 

Stock assessment is like designing a car engine – it is necessarily complicated. MSE, on the other hand, is more about driving the car – the controls and the instrumentation. MSE asks stakeholders what they know and care about and how best to achieve those outcomes. All this should be presented in a package that is easy to drive, with the focus being on where we are going, not the complexities under the hood. 

Technological Advances

HS.org: How have recent technological advances and data analytics improved the MSE process?

Tom: We’ve come a long way from coding a bespoke MSE from scratch for every case study. Packages like FLR and OpenMSE standardize data inputs and harvest strategy configuration, allowing for greater focus on the more important issues, such as management objectives and the harvest strategies themselves. 

My colleague, Dr. Adrian Hordyk, has been working hard on Slick, which is a package and online app that presents MSE results and diagnostics using graphics conceptualized by scientific communications experts. All together, this new technology has made MSE much more accessible and efficient.

HS. org: Where is there even more room for improvement?

Tom: MSE is still relatively new in the field of fisheries science and management. As a result, MSE processes tend to be rather ad-hoc and differ among fisheries management organizations and stocks. Much could be learned and synthesized from these various applications. 

Having the tech to do MSE easily is one thing. What is needed now is an established framework, an MSE roadmap of sorts, that is integrated with stakeholders and the tech so that the process is standardized, efficient, and disciplined. As it happens, this is something we are currently working on; what are the odds?!

Climate Change Adaptation

HS.org: How does MSE help adapt fisheries management to the impacts of climate change?

Tom: In a way, this is similar to the question about MSE and EBFM above. 

Just about every fishery management organization I know of has an objective along the lines of ‘implement management considerate of changing climatic conditions.’ Despite a huge amount of scientific literature naming possible impacts, there are very few that make quantitative predictions that could be used to inform management advice. From my perspective, the forecasting of climate impacts on fish populations is necessarily hypothetical. I simply don’t think we can reasonably evaluate the credibility of an ‘end to end’ model that combines the predictions of climate, oceanographic, ecosystem, physiology, and fleet models to forecast impacts on a fishery. This is a problem for the conventional stock assessment approach that focuses on scientific veracity. This is less of a problem for MSE, which focuses on harvest strategy robustness, including robustness to highly uncertain future fishery scenarios. MSE might be the only framework we have available for establishing tactical advice for fisheries, providing us with harvest strategies that have demonstrated climate readiness.

HS.org: What roles do climate change and environmental variability play in shaping MSE approaches?

Tom: In general, these phenomena interact with the types of harvest strategies being tested. In an attempt to consider possible climate change or environmental conditions, MSEs often simulate changes in future stock productivity. Systematic productivity shifts tend to favor harvest strategies aiming to fish a consistent fraction of the stock over those that aim for a particular stock level. Variable stock productivity tends to favor harvest strategies that are responsive to recent data and allow for larger changes in management advice. Depending on resource conservation objectives, climate change, and other challenging environmental scenarios can be highly influential in harvest strategy selection if they provide an extreme stress test.

Global Collaboration

HS.org: What role does international collaboration play in developing and applying MSE, especially for transboundary fisheries?

Tom: Collaboration on both scientific and management aspects is absolutely essential. On the science side, an MSE for an international transboundary stock almost always requires the timely submission of standardized data from all fishing nations and a shared understanding of the important fishery uncertainties. Although these may already be a part of an existing stock assessment process, MSE tends to go further and allow for a wider range of data and hypotheses. 

You could argue that the most important collaboration occurs at the management level, where I have less experience. Those managers must agree on aspects that may include the mundane, such as how often to update advice; the important, such as the principle management objectives; and the contentious, such as catch allocations. For transboundary stocks, international collaboration can be seen as an opportunity and a strength, but it is also a necessary precondition of MSE.

HS.org: In your opinion, which regional fisheries management organizations (RFMOs) are leading the way in adopting and refining MSE practices? What lessons can be learned from these pioneers that could be applied globally?

Tom: I think CCSBT does a remarkable job of including new genetic technology in their MSE frameworks, not just in defining fishery hypotheses but also in the harvest strategy itself. I think the lesson from CCSBT is to keep innovating and looking for new sources of scientific information. 

Now, sadly, I am biased toward those processes I have had some direct involvement with:

The Canadian DFO is leading the way with data-poor and data-moderate MSE frameworks in B.C. DFO has established a framework for its groundfish fisheries that allows for the rapid adoption of simple empirical harvest strategies where a stock assessment is not feasible. The lesson from DFO is that MSE is not necessarily an exercise for data-rich stocks – the whole idea of establishing tactical advice in the face of uncertainty is very much a data-poor fishery problem.

Future Directions

HS.org: What do you see as the future directions for MSE in fisheries management over the next decade?

Tom: In the next decade, MSE should:

  1. become more efficient (faster / cheaper);
  2. become better standardized (i.e., an established roadmap or modus operandii);
  3. develop a standard language and testing approach for EBFM and climate projections;
  4. inform other aspects of the overall management strategy, including data collection and enforcement;
  5. lead to clearer statements about the aims of fisheries managers.

HS.org: What are the key research questions or areas that, if addressed, could significantly advance the field of MSE? Are there particular gaps in our current understanding or methodology that need to be filled?

Tom: For the most part, we still think of fishery management in terms of individual species and data streams for individual species. From the early work I have been doing, it is apparent that if we consider multiple stocks together, the data may have considerably more information about stock and exploitation levels. I think there must be more investigation into multi-species MSEs and harvest strategies. We could be ignoring a lot of information. 

In most cases, MSE has been used to establish a harvest strategy that sets a catch limit. There needs to be a greater focus on the efficacy of mixed management options, such as a catch limit in combination with other regulations such as bag limits, effort limits, spatiotemporal closures, and size limits. Exploration of mixed management controls often reveals opportunities to obtain a superior trade-off in yield and resource conservation. 

Advice for Practitioners

HS.org: What advice would you give fisheries managers and scientists who are new to MSE and looking to implement it in their region’s fisheries?

Tom:

  1. Be clear about the problem you are solving by pursuing MSE
  2. Hire an experienced MSE expert to chair the process
  3. Develop a roadmap of MSE processes and assign roles to participants
  4. Engage in a comprehensive and ongoing consultation with stakeholders and managers on objectives, fishery hypotheses, and candidate harvest strategies
  5. Work fast, hard, and with discipline 
  6. Be decisive. 
  7. Don’t forget that if this is a new MSE, you are currently managing the fishery with an unknown performance approach!

Dr. Tom Carruthers’ insights highlight the critical role of innovation, collaboration, and a disciplined approach in advancing MSE to address the evolving challenges in modern fisheries management. By focusing on efficiency, stakeholder engagement, and adapting to environmental changes, MSE can provide robust and sustainable solutions for the future of our oceans. To learn more about MSE and Tom’s work, please visit www.bluematterscience.com.