# Editorial: Ecocentric fisheries management in European seas: data gaps, base models and initial assessments: vol. 1

Athanassios C. Tsikliras, Gianpaolo Coro, Georgi Daskalov, David Grémillet, Marco Scotti, Georgios Sylaios

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## To cite this version:

Athanassios C. Tsikliras, Gianpaolo Coro, Georgi Daskalov, David Grémillet, Marco Scotti, et al. Editorial: Ecocentric fisheries management in European seas: data gaps, base models and initial assessments: vol. 1. Frontiers in Marine Science, 2023, 10, pp.1295733. 10.3389/fmars.2023.1295733. hal-04930734

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OPEN ACCESS

EDITED AND REVIEWED BY
Stephen J. Newman,
Western Australian Fisheries and Marine
Research Laboratories, Australia

*CORRESPONDENCE
Athanassios C. Tsikliras

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atsik@bio.auth.gr

RECEIVED 17 September 2023

ACCEPTED 26 September 2023

PUBLISHED 09 October 2023

CITATION
Tsikliras AC, Coro G, Daskalov G, Grémillet D, Scotti M and Sylaios G (2023)
Editorial: Ecocentric fisheries management
in European seas: Data gaps, base models
and initial assessments, volume I.
*Front. Mar. Sci.* 10-1295733.
doi: 10.3389/fmars.2023.1295733

COPYRIGHT
© 2023 Tsikliras, Coro, Daskalov, Grémillet, Scotti and Sylaios. This is an open-access
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# Editorial: Ecocentric fisheries management in European seas: Data gaps, base models and initial assessments, volume I

Athanassios C. Tsikliras¹*, Gianpaolo Coro², Georgi Daskalov³, David Grémillet⁴,⁵, Marco Scotti⁶,⁷ and Georgios Sylaios⁸

¹Laboratory of Ichthyology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece, ²Institute of Information Science and Technologies “Alessandro Faedo”, Pisa, Italy, ³Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria, ⁴Centre d’Ecologie Fonctionnelle et Evolutive, Université de Montpellier, Centre National de la Recherche Scientifique, Ecole Pratique des Hautes Etudes, Institut de Recherche pour le Développement, Montpellier, France, ⁵FitzPatrick Institute, Department of Science and Technology (DST)/National Research Foundation (NRF) Excellence Centre at the University of Cape Town, Cape Town, South Africa, ⁶GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, ⁷Institute of Biosciences and Bioresources, National Research Council of Italy, Sesto Fiorentino, Italy, ⁸Democritus University of Thrace, Xanthi, Greece

KEYWORDS

ecosystem based fisheries management (EBFM), co-design, marine policy, ecosystem
modelling, stock assessment

Editorial on the Research Topic

Ecocentric fisheries management in European seas: Data gaps, base
models and initial assessments, volume I

Fisheries exploitation has historically been considered as the strongest driver of fish
population dynamics (Jackson et al., 2001). Existing fisheries management practices have
not always been successful in sustainably exploiting fish stocks (Froese et al., 2018) because
of weaknesses in management approaches (Froese et al., 2021), the lack of consideration of
ecosystem processes (Skern-Mauritzen et al., 2016), improper management implementation
(Schnute et al., 2007), harmful government subsidies (Sumaila et al., 2021), and illegal,
unreported and unregulated fishing (Agnew et al., 2009). Moreover, data deficiencies often
constrain stock assessments and ecosystem model construction, tools that provide the basis
for decision-making in fisheries management (Dimarchopoulou et al., 2017). Stocks that do
not exhibit commercial interest have generally been given a low priority (Tsikliras et al.,
2021), and the conservation status of marine megafauna is unknown in many European
areas, especially in the Mediterranean and the Black Sea (Gremillet et al., 2022). Commercial
and recreational fishing strongly influence all levels of biological organisation, from
populations to ecological communities, directly affecting ecosystem structure and
function (Pauly et al., 1998). Such circumstances raise the pressing need for a paradigm
shift from the anthropocentric (=human-centred) perception of commercial stock surplus
yield (Chapman, 1949) to an ecocentric (=ecosystem-centred) fisheries management that
incorporates all ecosystem components, including abiotic and socio-economic factors (Link, 2010), aiming at rebuilding fish stocks, and restoring ecosystems and habitats (Lotze et al., 2011). This whole-ecosystem approach to managing fisheries aspires to ensure a balance between food security and healthy seas (Schiller et al., 2018), secure fisheries jobs (Teh and Sumaila, 2013), and even minimising exploitation while prioritising sustainable fishing practices that feed people (Jacquet and Pauly, 2022).

The design of interactive policies that aim to implement the ecocentric fisheries management is better served through a holistic and integrated perspective to maintain ecosystem integrity. They should be supported by the adoption of a precautionary approach to fisheries with broad stakeholder participation, while also promoting sector integration (Pikitch et al., 2004). This will require interdisciplinarity among scientists to achieve the best possible knowledge of biotic, abiotic, and human components of ecosystems and their interactions (Cury, 2004), as well as information on social and economic factors that affect the availability of ecosystem services within marine ecoregions (FAO, 2021).

Understanding the biology and ecology of most species within an ecosystem is, in some areas, far from complete, and appropriate assessment models and decision-support tools need to be further developed. Sources of uncertainty, such as ecological and biological knowledge gaps and future climatic conditions must be accounted for (Link et al., 2012). Basic biological data are essential for stock and vulnerability assessments as well as for ecosystem models that facilitate the understanding of ecosystem functioning and responses to change and can, therefore, inform ecosystem-based fisheries management (EBFM: Daskalaki et al., 2022). Measuring the human impact on organisms, habitats and ecosystems (Piroddi et al., 2017), assessing the status and trends of fisheries and stocks (Froese et al., 2018), and evaluating ecosystem health using novel indicators (Link and Watson, 2019) and technologies (Coro et al., 2013) are also prerequisites for effective ecocentric fisheries management. These measures, in fact, provide the baseline of current and past ecosystem status, which in turn can be used to define future management targets. Finally, ecosystem models (Christensen and Walters, 2004) are the key tool to studying marine ecosystems (Heymans et al., 2020), and exploring fisheries management and climate change scenarios by incorporating temporal and spatial ecosystem dynamics (Heymans et al., 2016).

Addressing trade-offs among the wide range of issues involved in EBFM, such as ecological principles, legal mandates, climate change and economic interests (Hart and Fay, 2020) will hopefully lead to a shift towards the perception that ecocentric fisheries management, albeit demanding and challenging, is a necessary and feasible option. In Europe, the specific objectives of fisheries management within the full ecosystem framework will have to be designed to fulfil the requirements of the Common Fisheries Policy (CFP) and the Blue Growth Strategy (BG). They will also have to aim at the Good Environmental Status (GES) as defined for the Marine Strategy Framework Directive (MSFD) descriptors and will have to be aligned with the EU Green Deal, the EU Biodiversity Strategy for 2030 and the Maritime Spatial Planning (MSP) Directive.

The present Research Topic aimed to (i) identify gaps in biological and ecological knowledge across marine ecosystem

components, ecosystem models, food web models, fisheries catch statistics, and survey data; (ii) assess the current status of exploited populations; (iii) evaluate the efficiency of current fisheries management approaches within the context of ecosystem and anthropogenic impact including climate change; and (iv) create base ecosystem models across the European Seas that will be used to examine ecosystem management scenarios in the future.

The present Research Topic included six original articles, two reviews, and one policy and practice review. The six original articles focused on Mediterranean ecosystems, where data gaps and deficiencies are wider. Spatiotemporal and environmental modelling, that can be applied to areas with varying heterogeneity, was used to identify and fill gaps in trawl surveys in the Adriatic Sea (Coro et al.). In the same area, a timely manuscript examined the (beneficial) effects of the COVID-19 lockdown related fishing restrictions and the involuntary fishing effort reduction on the status of target stocks (Scarcella et al.). The impact of fisheries on ecosystem structure and functioning was examined in the Sea of Marmara over a period of thirty years (Saygu et al.), while data availability and the participatory approach for promoting fisheries sustainability were reported for the central and western Mediterranean Sea (Malvarosa et al.). Two trophic structure models were developed using the EwE modelling approach, one focusing on the oligotrophic ecosystem of the Balearic Islands in the western Mediterranean Sea (Sánchez-Zulueta et al.) and the other evaluating fisheries management policies in the alien-rich eastern Mediterranean Sea (Ofir et al.). An exhaustive review of all EwE models applied in European marine ecosystems stressed the importance of ecosystem modelling in studying the structure and dynamics of ecosystems and examining management and climate scenarios (Keramidas et al.). Another article reviewed all available biological information on non-fish marine organisms and identified gaps in knowledge across European Seas (Abucay et al.). Finally, the policy and practice review included the global and European policies and implementing bodies which have a repercussion on the implementation of EBFM, highlighting specific stakeholder needs, which ecosystem models could help address (Rodriguez Perez et al.).

## Author contributions

AT: Conceptualization, Writing – original draft. GC: Writing – review & editing. GD: Writing – review & editing. DG: Writing – review & editing. MS: Writing – review & editing. GS: Writing – review & editing.

## Funding

The author(s) declare financial support was received for the research, authorship, and/or publication of this article. This Research Topic is part of the European Union's Horizon 2020 Research and Innovation Program (H2020-BG-10-2020-2), grant number No. 101000302 - EcoScope (Ecocentric management for sustainable fisheries and healthy marine ecosystems). The funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.
## Acknowledgments

The authors would like to thank Donna Dimarchopoulou for her comments and suggestions. Clearly, the project title, rationale and content were inspired by the leading-edge article of Philippe Cury (Cury, 2004); the term “ecoscope” was first used by Ulanowicz (1993).

## Conflict of interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

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## Publisher's note

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