Katell G. Hamon

• PhD
• Researcher at Wageningen University & Research

Dit rapport beschrijft de resultaten van een verkennende studie die is uitgevoerd in opdracht van het ministerie van Landbouw, Natuur en Voedselkwaliteit. Centraal staat de vraag welke mogelijke beloonsystemen er in de internationale visserijliteratuur bekend zijn die mogelijk zouden kunnen worden ingezet om vissers die vrijwillig selectiever visse...

The Working Group on Economics (WGECON) was established to address the challenge of bringing fisheries economics into ICES science and advice, with the growing recognition that this can facilitate the understanding of marine ecosystem uses, their drivers and responses to changes, and assessment and communication of trade-offs that include economic,...

The Workshop on pathways to climate-aware advice (WKCLIMAD) met in the autumn of 2021 to develop a proposal for an advisory framework that accounts for the influences of climate change on aquaculture, fisheries, and ecosystems. The workshop worked through online ses-sions with over 40 participants. Climate-informed advice should be provided through...

Fisheries are supposed to be for the benefit of society, producing food, providing livelihoods and enabling cultural continuity. Biological productivity goals for fish stocks operationalised through Harvest Control Rules (HCRs) are central to contemporary fisheries management. While fisheries policies often state socio‐economic objectives, such as...

While the science supporting fisheries management has generally been dominated by the natural sciences, there has been a growing recognition that managing fisheries essentially means managing economic systems. Indeed, over the past seven decades, economic ideas and insights have increasingly come to play a role in fisheries management and policy. A...

To effectively future-proof the management of the European Union fishing fleets we have explored a suite of case studies encompassing the northeast and tropical Atlantic, the Mediterranean, Baltic and Black Seas. This study shows that European Union (EU) fisheries are likely resilient to climate-driven short-term stresses, but may be negatively imp...

The mackerel (Scomber scombrus) stock is one of the commercially most important pelagic species in the Northeast Atlantic, being targeted by various nations. Environmental and stock size changes caused a stock expansion after 2007, initiating a yet unresolved dispute between the European Union, United Kingdom, Iceland, Greenland and the Faroe Islan...

Spatially explicit bio-economic models that are age-structured and dynamic become increasingly important, being used for different purposes including spatial management measure evaluation. One of the reasons why those complex models are still rare is the extensive data need. FishRent incorporates highly resolved economic information of multiple fle...

Background The field of behavioural economics holds several opportunities for integrated fisheries management and conservation and can help researchers and managers alike understand fisher behaviour and decision-making. As the study of the cognitive biases that influence decision-making processes, behavioural economics differentiates itself from th...

Report of the first workshop on an alternative approach to the segmentation of fishing fleets. Organized and chaired by Erik Sulanke and Jörg Berkenhagen, facilitated by the Regional Coordination Group on Economic Issues (RCGEcon) of the DCF.

Fisheries management is usually supported by technical and financial measurements (i.e. logbooks and market data), which are helpful for ecological or economic assessments. Yet this information is not able to address social heterogeneity and fisher motivations, which are key to understanding fisher behaviour. This case study of the demersal segment...

Climate change is anticipated to have long-term and widespread direct consequences for the European marine ecosystems and subsequently for the European fishery sector. Additionally, many socio-economic and political factors linked to climate change scenarios will impact the future development of fishing industries. Robust projection modeling of bio...

The Dutch government aims to expand renewable energy production and areas for nature conservation in the North Sea. These developments are part of its commitment to the Paris Agreement, implemented in Dutch legislation through the Climate Law (‘Klimaatwet’, 2019), and the Dutch North Sea Agreement (NZA) involving the main economic users affected by...

It has proven extremely challenging for researchers to predict with confidence how human societies might develop in the future, yet managers and industries need to make projections in order to test adaptation and mitigation strategies designed to build resilience to long-term shocks. This paper introduces exploratory scenarios with a particular foc...

The ICES Working Group on Economics (WGECON) was established to address the challenge of bringing fisheries economics into ICES science and advice, with the growing recognition that this can assist process understanding of uses of marine ecosystems, their drivers and responses to changes, and assessment and communication of trade-offs that include...

Dit rapport maakt inzichtelijk welke economische waarde de zoekgebieden voor wind op zee in de periode 2030-2050 voor de Nederlandse visserij vertegenwoordigden in 2010-2019 en welke directe en indirecte sociaal-economische effecten sluiting van deze gebieden mogelijk voor de visserij en visserijgemeenschappen met zich meebrengt. De historische w...

Climate-driven changes in aquatic environments have already started to affect the European aquaculture sector’s most commercially important finfish and shellfish species. In addition to changes in water quality and temperature that can directly influence fish production by altering health status, growth performance and/or feed conversion, the aquac...

Environmental, political, and economic conditions influence fishermen’s decisions, which in turn have consequences on the profitability of fishing fleets. We applied the bio-economic model FishRent to understand the response of eight fleets operating in the Northeast Atlantic mackerel and North Sea autumn spawning herring fishery to a number of sce...

This report distils the main results of the EU H2020 project CERES "Climate Change and European Fisheries and Aquaculture" (grant number 678193) executed between 2016 and 2020. See the report for citation format.

The aim of United Nations Sustainable development Goal (SDG) 2 "Zero Hunger" is to end all forms of hunger and malnutrition by 2030. Total food demand is expected to increase by 60% compared to 2015 (SAPEA, 2017). In addition to increasing food production there are the challenges of reducing the pressure on land and on the use of fresh water for fo...

An Impact Assessment (IA) is a process aimed at structuring and supporting the development of policies. Besides the fact that IA assumes different features when applied to different sectors, really it should help policy makers in evaluating the contribution to the fisheries sustainability of new regulations. The recent improvements and development...

The overarching focus of Working Group on Maritime Systems (WGMARS) has been on under-standing the conceptualisation and implementation of Integrated Ecosystem Assessments (IEAs) in ICES and more broadly. From 2017-2019, the Working Group reviewed academic literature and ICES documents, interviewed the chairs of the ICES Regional Seas Working Group...

In this study, we investigate whether the neoclassical economic theory, capital market frictions or preference-based theory can explain investment behaviour in the Dutch beam trawler fishery in the North Sea. By presenting a number of estimations, we show that vessels conducting pulse fishing invest substantially more than similar vessels undertaki...

Marine ecosystems evolve under many interconnected and area-specific pressures. To fulfil society's intensifying and diversifying needs while ensuring ecologically sustainable development, more effective marine spatial planning and broader-scope management of marine resources is necessary. Integrated ecological–economic fisheries models (IEEFMs) of...

Marine ecological change is likely to have serious potential economic consequences for coastal economies all over the world. This article reviews the current literature on the economic impacts of marine ecological change, as well as a number of recent contributions to this literature carried out under the VECTORS project. We focus on three main typ...

BENTHIS developed the scientific basis to quantify the impact of bottom trawling on the seafloor and the benthic ecosystem. Based on insight in how fishing gear affects the seafloor, an assessment framework was developed that provide indicators of impact and seafloor status on a continuous scale that can be applied in the context of the MSFD. The m...

TO NUDGE OR NOT TO NUDGE; is nudging in fisheries management necessarily libertarian paternalism? We are a group of fisheries management scientists who became interested in the question whether nudging can be useful in fisheries management and the ethics of it. Ideas on nudging are very recent and new in the fisheries-management world, and we have...

p>This article was published in GCB (2016/22:2462–2474). The authors of the paper ‘Modelling marine community responses to climate-driven species redistribution to guide monitoring and adaptive ecosystem-based management’ would like to inform readers that the R code supplied as online Supporting Information (SI2), includes an error that affects the...

The relationship between fisheries and marine spatial planning (MSP) is still widely unsettled. While several scientific studies highlight the strong relation between fisheries and MSP, as well as ways in which fisheries could be included in MSP, the actual integration of fisheries into MSP often fails. In this article, we review the state of the a...

Anticipating fisher behaviour is necessary for successful fisheries management. Of the different concepts that have been developed to understand individual fisher behaviour, random utility models (RUMs) have attracted considerable attention in the past three decades, and more particularly so since the 2000s. This study aimed at summarizing and anal...

One of the most important goals in current fisheries management is to maintain or restore stocks above levels that can produce the maximum sustainable yield (MSY). However, it may not be feasible to achieve MSY simultaneously for multiple species because of trade-offs that result from interactions between species, mixed fisheries and the multiple o...

The Paris Conference of Parties (COP21) agreement renewed momentum for action against climate change, creating the space for solutions for conservation of the ocean addressing two of its largest threats: climate change and ocean acidification (CCOA). Recent arguments that ocean policies disregard a mature conservation research field and that protec...

Marine ecological change is likely to have serious potential economic consequences for coastal economies all over the world. This article reviews the current literature on the economic impacts of marine ecological change, as well as a number of recent contributions to this literature carried out under the VECTORS project. We focus on three main typ...

As a consequence of global climate-driven changes, marine ecosystems are experiencing polewards re-distributions of species - or range shifts - across taxa and throughout latitudes worldwide. Research on these range shifts largely focuses on understanding and predicting changes in the distribution of individual species. The ecological effects of ma...

A framework to assess the impact of mobile fishing gear on the seabed and benthic ecosystem is presented. The framework that can be used at regional and local scales provides indicators for both trawling pressure and ecological impact. It builds on high-resolution maps of trawling intensity and considers the physical effects of trawl gears on the s...

The Myfish project aimed to provide science on the challenges of Maximum Sustainable Yield (MSY) management that was both high level and highly relevant to the managers, industry representatives, NGOs and scientists who would make use of it. To ensure this, the project was designed to be inclusive all the way from the proposal writing phase to the...

A framework to assess the impact of mobile fishing gear on the seabed and benthic ecosystem is presented. The framework that can be used at regional and local scales provides indicators for both trawling pressure and ecological impact. It builds on high-resolution maps of trawling intensity and considers the physical effects of trawl gears on the s...

Marine activities have been increasingly competing for space and reducing areas for fishing. The use of spatially explicit tools can assist the decision making process on defining the optimal location of closures for fishing due to these emerging activities.This paper presents the Spatial Integrated bio-economic Model for FISHeries (SIMFISH). In th...

High-grading is the decision by fishers to discard fish of low value that allows them to land more valuable fish. A literature review showed high-grading is reported in commercial and non-commercial fisheries around the world, although the number of observations is small. High-grading occurs in fisheries that are restricted to land their total catc...

This report provides an overview of the important benefits and costs for six variant closures for the protection of the benthic ecosystem on the Frisian Front and the Central Oyster Grounds. The proposed closures lead to a range of ecological benefits and economic costs. The current study facilitates an informed discussion about an optimal allocati...

The Workshop on the Transversal Variables took place in Zagreb from the 19th to 23rd of January, 2015 mainly to tackle the issues related to the increasing need of having fisheries fleet economic data and fisheries biologic data on a level of disaggregation that would allow a proper interoperability between datasets to underpin bioeconomic modellin...

Door de introductie van puls-techniek lijkt een ruimtelijke verplaatsing van de kottervisserij plaats te vinden (door economische overwegingen van vissers) naar de kustwateren (12-mijlszone). Door de efficiëntere tongvangsten lijkt het niet meer noodzakelijk om ver uit de kust te vissen. Deze verschuiving kan mogelijke risico’s met zich meebrengen...

There is growing interest in bioeconomic models as tools for understanding pathways of fishery behaviour in order to assess the impact of alternative policies on natural resources. A model system is presented that combines stochastic age-structured population dynamics with complex fisheries economics. Explicitly, the economic response of fleet segm...

Fisheries management operates under the inherent tension between the interests of the individual fishing business, e.g., making immediate profits, and the interests of society, e.g., limiting fishing to sustainable levels. Conventionally, fisheries management aims to modify the behaviour of fishers by laws and regulations. As with all other human b...

The rock lobster, Jasus edwardsii, lies on a global “hotspot” for climate change in the southeastern Australian state of Tasmania. The short-term effects of climate change are predicted to lead to an increasing exploitable biomass in the south and declining biomass in the north of the state. The future of the fishery is highly uncertain due to clim...

The Central Oyster Grounds are generally awarded for their ecological values. The area is especially important for benthos because of their species diversity and density, the total biomass, distribution of species, and the balanced composition of the benthic community' (Ministry of Economic affairs, 2012). In the Marine Strategy (OlM/2012-25338), t...

In 2008, the Minister of Agriculture, Nature and Food Quality notified four proposed Sites of Community Interest (pSCIs) to the European Commission (for protection as Special Conservation Areas (SCAs) under the Habitats Directive). These areas are the Dogger Bank, Cleaver Bank, the Coastal Zone and the Vlakte van de Raan. The areas have been chosen...

In 2008, the Minister of Agriculture, Nature and Food Quality notified four proposed Sites of Community In-terest (pSCIs) to the European Commission (for protection as Special Conservation Areas (SCAs) under the Habitats Directive). These areas are the Dogger Bank, Cleaver Bank, the Coastal Zone and the Vlakte van de Raan. The areas have been chose...

In 2020 moet 16% van de Nederlandse energievoorzieing duurzaam worden opgewekt. Windenergie op zee is een van de duurzame energiebronnen die Nederland gaat gebruiken om deze doelstelling te halen. Begin 2013 is besloten om een Haalbaarheidsstudie naar de (on)mogelijkheden van windenergie binnen de 12 mijlszone uit te voeren. In deze haalbaarheidsst...

Naar aanleiding van een slechtere groei van kweekoesters in de Oosterschelde heeft de oestersector de vraag gesteld of het toelaten van nutriëntenrijk zoetwater uit het Volkerak-Zoommeer (10 m3 sec-1) of het wegvangen van de helft van de wilde oesters in de Kom van de Oosterschelde een positief effect zou kunnen hebben op de kweekoesters in dat geb...

This guidance document provides a comprehensive assessment of the conflicts and synergies between fisheries, aquaculture and other activities in the coastal zone in six COEXIST case study areas. It forms deliverable D5.2 of the COEXIST project and synthesises deliverable D5.1, which provides a more detailed description of the methods used and resul...

In the domain of decision-support tools for the management of marine fish resources, considerable attention has been paid to the development of models explaining how fish stocks change over space and time. In most models, fishing effort is assumed to be exogenous and determined by factors such as management. Increasingly, there has been a call for...

In the past three decades, there has been a move towards rights-based management of access to marine fisheries, especially individual transferable quotas (ITQs). Although it is generally agreed that ITQs improve the economic efficiency of fisheries, few empirical studies examined how stakeholders respond to the incentives set in an ITQ fishery, det...

Individual Transferable Quota (ITQ) management systems are typically introduced to promote better capital utilisation by the fishing fleet and other efficiency gains. ITQ management was introduced in the Tasmanian rock lobster industry in 1998 and led to a range of economic, social and cultural changes including an increasing proportion of the catc...

Individual transferable quotas (ITQ) were implemented in the Tasmanian red rock lobster fishery in 1998 and ten years later we assessed the impacts on the fishery. Particular attention was devoted to investigating the performances of the fishery with regard to three features identified as major impacts in the literature: rationalization of the fish...

EXTENDED ABSTRACT Most demersal stocks keep being overexploited despite the numerous management measures im-plemented. New approaches in methods for pro-viding scientific advice to fisheries management include simulation-based MSE (Management Strategy Evaluation), aiming at identifying man-agement strategies robust to various sources of uncertainti...