Omar Defeo

Biographic Data

ID	895235
NAME	Omar Defeo
GIVEN NAMES	Omar
FAMILY NAME	Defeo
SIGNATURE	DEFEO O
AFFILIATIONS	Universidad de la República de Uruguay
ORCID	0000-0001-8318-528X
VERIFIED	Yes
TOTAL WORKS	21
TOTAL CITATIONS	8
AUTHOR COUNT	21
EDITOR COUNT	0
FIRST PUBLICATION YEAR	2010
LATEST PUBLICATION YEAR	2026
H-INDEX	2

Social–ecological network analysis of governance gaps in a newly designated marine protected area of the Global South
Open AccessFederico Fraga, Omar Defeo et al.ARTICLEMarine Policy2026
Effective Marine Protected Areas (MPAs) depend on governance arrangements that are well-aligned with the dynamics of the social–ecological systems they aim to manage. However, baseline assessments at the time of MPA designation often prioritize ecological and biological data, while social dimensions tend to receive less attention, limiting opportunities to inform early management planning. To address this gap, we applied Social–Ecological Network…
The Ecology of Sandy Shores
Omar Defeo, Anton McLachlanBOOKEcology of Sandy Shores2025
Epilogue
Open AccessOmar Defeo, Anton McLachlanCHAPTEREcology of Sandy Shores2025
Towards an ecosystem approach to fisheries in the Galapagos Marine Reserve
Open AccessMauricio Castrejón, Omar DefeoARTICLEMarine Policy2025
Facing oceanographic, fisheries, and governance hotspots
Open AccessOmar Defeo, Bárbara C Franco et al.ARTICLEMarine Policy2025
The role of family in shaping adaptation and adaptive capacity in small-scale fishing communities
Open AccessFarah El-Shayeb, Jeremy Pittman et al.ARTICLEJournal of Rural Studies2025Cited by: 1References: 3
Ecology of Sandy Shores
A C Brown, Anton McLachlan et al.BOOKEcology of Sandy Shores2024
Assessing the performance of a participatory governance transformation in small-scale fisheries
Open AccessSofía Bausero-Jorcin, Stefan Gelcich et al.ARTICLEMarine Policy2024
Reconsidering the longline ban in the Galapagos Marine Reserve
Open AccessMauricio Castrejón, Omar DefeoARTICLEMarine Policy2023
In 2000, longline fishing was banned inside the Galapagos Marine Reserve to prevent illegal fishing of sharks and bycatch of endangered, threatened, and protected (ETP) species. Despite local management institutions possess one of the most sophisticated control and surveillance systems in the Eastern Tropical Central Pacific, statistical and anecdotic evidence suggest the longline ban has been ineffective in eradicating illegal, unreported and un…
Climate‐driven ‘species‐on‐the‐move’ provide tangible anchors to engage the public on climate change
Open AccessGretta T Pecl, Rachel Kelly et al.ARTICLEPeople and Nature2023
Over recent decades, our understanding of climate change has accelerated greatly, but unfortunately, observable impacts have increased in tandem. Both mitigation and adaptation have not progressed at the level or scale warranted by our collective knowledge on climate change. More effective approaches to engage people on current and future anthropogenic climate change effects are urgently needed. Here, we show how species whose distributions are s…
Social-ecological shifts, traps and collapses in small-scale fisheries
Open AccessVillasante, Ignacio Gianelli et al.ARTICLEMarine Policy2022
Small-scale fisheries (SSF) are critical to food systems and livelihoods. However, the relation between fisheries resilience, outcomes of proximate and distal drivers and the potential space for transformative changes have been largely unexplored. Such knowledge is key to understanding how fishery resources, institutions and actors respond to, and learn from, diverse drivers of change and social-ecological crises, as well as to design policies ai…
Linking small-scale fisheries performance to governance attributes
Open AccessRosana Ouréns, Michael C Melnychuk et al.ARTICLEMarine Policy2022
Long-term trends in striped venus clam (Chamelea gallina) fisheries in the western Mediterranean Sea
Open AccessMarc Baeta, Marco Antonio Solís et al.ARTICLEMarine Policy2021
All clam fisheries in the western Mediterranean Sea have dramatically declined in the last few decades. Recently, most have collapsed in Spain, resulting in job loss for hundreds of small-scale fishers. However, insufficient attention has been given to the profound significance of this socio-ecological crisis. We evaluated the historical, social, and ecological context of the striped venus clam (Chamelea gallina) fisheries in the western Mediterr…
Harnessing scientific and local knowledge to face climate change in small-scale fisheries
Open AccessIgnacio Gianelli, Leonardo Ortega et al.ARTICLEGlobal Environmental Change2021Cited by: 4References: 3
Desafios para promoção da abordagem ecossistêmica à gestão de praias na América Latina e Caribe
Open AccessMarina Ribeiro Corrêa, Luciana Yokoyama Xavier et al.ARTICLEEstudos Avançados2021References: 35
A complexidade das mudanças globais e seus efeitos nos sistemas socioecológicos motivam o desenvolvimento de abordagens de gestão mais integradas e inovadoras para equilibrar as relações sociedade-natureza. Com o desafio de suprir demandas globais e considerar impactos locais, a Gestão Baseada em Ecossistemas (GBE) aparece como uma estratégia de avaliação e ação com potencial de qualificar as interações socioecológicas. Nesse sentido, as praias a…
A comparative appraisal of the resilience of marine social-ecological systems to mass mortalities of bivalves
Open AccessPatrice Guillotreau, Edward H Allison et al.ARTICLEConservation Ecology2017Cited by: 1
Guillotreau, P., E. H. Allison, A. Bundy, S. R. Cooley, O. Defeo, V. Le Bihan, S. Pardo, R. Perry, G. Santopietro, and T. Seki. 2017. A comparative appraisal of the resilience of marine social-ecological systems to mass mortalities of bivalves. Ecology and Society 22(1):46. https://doi.org/10.5751/ES-09084-220146
Variabilidad climática y su impacto en pesquerías de pequeña escala de invertebrados en América Latina
Open AccessOmar Defeo, Mauricio Castrejón et al.ARTICLEDesenvolvimento e Meio Ambiente2014
As pescarias de pequena escala ou artesanais desempenham um papel fundamental para a segurança alimentar e para a mitigação da pobreza na América Latina. Estas pescarias estão cada vez mais ameaçadas por fatores antropogênicos e climáticos que atuam em diversas escalas espaço-temporais. Este trabalho documenta os efeitos da variabilidade climática em pescarias de pequena escala de invertebrados na América Latina, com base na literatura recente. A…
Impacts of Climate Variability on Latin American Small-scale Fisheries
Open AccessOmar Defeo, Mauricio Castrejón et al.ARTICLEConservation Ecology2013
Defeo, O., M. Castrejón, L. Ortega, A. M. Kuhn, N. L. Gutiérrez, and J. C. Castilla. 2013. Impacts of climate variability on Latin American small-scale fisheries. Ecology and Society 18(4): 30. https://doi.org/10.5751/ES-05971-180430
Governance and governability of coastal shellfisheries in Latin America and the Caribbean
Open AccessOmar Defeo, Juan Carlos CastillaARTICLECurrent Opinion in Environmental…2012Cited by: 2References: 2
Leadership, social capital and incentives promote successful fisheries
Open AccessNicolás L Gutiérrez, Ray Hilborn et al.ARTICLENature2011
Navigating transformations in governance of Chilean marine coastal resources
Open AccessStefan Gelcich, Thomas P Hughes et al.ARTICLEProceedings of the National…2010
Marine ecosystems are in decline. New transformational changes in governance are urgently required to cope with overfishing, pollution, global changes, and other drivers of degradation. Here we explore social, political, and ecological aspects of a transformation in governance of Chile's coastal marine resources, from 1980 to today. Critical elements in the initial preparatory phase of the transformation were ( i ) recognition of the depletion of…

Navigating transformations in governance of Chilean marine coastal resources
Open AccessStefan Gelcich, Thomas P Hughes et al.ARTICLEProceedings of the National…2010
Marine ecosystems are in decline. New transformational changes in governance are urgently required to cope with overfishing, pollution, global changes, and other drivers of degradation. Here we explore social, political, and ecological aspects of a transformation in governance of Chile's coastal marine resources, from 1980 to today. Critical elements in the initial preparatory phase of the transformation were ( i ) recognition of the depletion of…
Leadership, social capital and incentives promote successful fisheries
Open AccessNicolás L Gutiérrez, Ray Hilborn et al.ARTICLENature2011
Governance and governability of coastal shellfisheries in Latin America and the Caribbean
Open AccessOmar Defeo, Juan Carlos CastillaARTICLECurrent Opinion in Environmental…2012Cited by: 2References: 2
Impacts of Climate Variability on Latin American Small-scale Fisheries
Open AccessOmar Defeo, Mauricio Castrejón et al.ARTICLEConservation Ecology2013
Defeo, O., M. Castrejón, L. Ortega, A. M. Kuhn, N. L. Gutiérrez, and J. C. Castilla. 2013. Impacts of climate variability on Latin American small-scale fisheries. Ecology and Society 18(4): 30. https://doi.org/10.5751/ES-05971-180430
Variabilidad climática y su impacto en pesquerías de pequeña escala de invertebrados en América Latina
Open AccessOmar Defeo, Mauricio Castrejón et al.ARTICLEDesenvolvimento e Meio Ambiente2014
As pescarias de pequena escala ou artesanais desempenham um papel fundamental para a segurança alimentar e para a mitigação da pobreza na América Latina. Estas pescarias estão cada vez mais ameaçadas por fatores antropogênicos e climáticos que atuam em diversas escalas espaço-temporais. Este trabalho documenta os efeitos da variabilidade climática em pescarias de pequena escala de invertebrados na América Latina, com base na literatura recente. A…
A comparative appraisal of the resilience of marine social-ecological systems to mass mortalities of bivalves
Open AccessPatrice Guillotreau, Edward H Allison et al.ARTICLEConservation Ecology2017Cited by: 1
Guillotreau, P., E. H. Allison, A. Bundy, S. R. Cooley, O. Defeo, V. Le Bihan, S. Pardo, R. Perry, G. Santopietro, and T. Seki. 2017. A comparative appraisal of the resilience of marine social-ecological systems to mass mortalities of bivalves. Ecology and Society 22(1):46. https://doi.org/10.5751/ES-09084-220146
Long-term trends in striped venus clam (Chamelea gallina) fisheries in the western Mediterranean Sea
Open AccessMarc Baeta, Marco Antonio Solís et al.ARTICLEMarine Policy2021
All clam fisheries in the western Mediterranean Sea have dramatically declined in the last few decades. Recently, most have collapsed in Spain, resulting in job loss for hundreds of small-scale fishers. However, insufficient attention has been given to the profound significance of this socio-ecological crisis. We evaluated the historical, social, and ecological context of the striped venus clam (Chamelea gallina) fisheries in the western Mediterr…
Harnessing scientific and local knowledge to face climate change in small-scale fisheries
Open AccessIgnacio Gianelli, Leonardo Ortega et al.ARTICLEGlobal Environmental Change2021Cited by: 4References: 3
Desafios para promoção da abordagem ecossistêmica à gestão de praias na América Latina e Caribe
Open AccessMarina Ribeiro Corrêa, Luciana Yokoyama Xavier et al.ARTICLEEstudos Avançados2021References: 35
A complexidade das mudanças globais e seus efeitos nos sistemas socioecológicos motivam o desenvolvimento de abordagens de gestão mais integradas e inovadoras para equilibrar as relações sociedade-natureza. Com o desafio de suprir demandas globais e considerar impactos locais, a Gestão Baseada em Ecossistemas (GBE) aparece como uma estratégia de avaliação e ação com potencial de qualificar as interações socioecológicas. Nesse sentido, as praias a…
Social-ecological shifts, traps and collapses in small-scale fisheries
Open AccessVillasante, Ignacio Gianelli et al.ARTICLEMarine Policy2022
Small-scale fisheries (SSF) are critical to food systems and livelihoods. However, the relation between fisheries resilience, outcomes of proximate and distal drivers and the potential space for transformative changes have been largely unexplored. Such knowledge is key to understanding how fishery resources, institutions and actors respond to, and learn from, diverse drivers of change and social-ecological crises, as well as to design policies ai…
Linking small-scale fisheries performance to governance attributes
Open AccessRosana Ouréns, Michael C Melnychuk et al.ARTICLEMarine Policy2022
Reconsidering the longline ban in the Galapagos Marine Reserve
Open AccessMauricio Castrejón, Omar DefeoARTICLEMarine Policy2023
In 2000, longline fishing was banned inside the Galapagos Marine Reserve to prevent illegal fishing of sharks and bycatch of endangered, threatened, and protected (ETP) species. Despite local management institutions possess one of the most sophisticated control and surveillance systems in the Eastern Tropical Central Pacific, statistical and anecdotic evidence suggest the longline ban has been ineffective in eradicating illegal, unreported and un…
Climate‐driven ‘species‐on‐the‐move’ provide tangible anchors to engage the public on climate change
Open AccessGretta T Pecl, Rachel Kelly et al.ARTICLEPeople and Nature2023
Over recent decades, our understanding of climate change has accelerated greatly, but unfortunately, observable impacts have increased in tandem. Both mitigation and adaptation have not progressed at the level or scale warranted by our collective knowledge on climate change. More effective approaches to engage people on current and future anthropogenic climate change effects are urgently needed. Here, we show how species whose distributions are s…
Ecology of Sandy Shores
A C Brown, Anton McLachlan et al.BOOKEcology of Sandy Shores2024
Assessing the performance of a participatory governance transformation in small-scale fisheries
Open AccessSofía Bausero-Jorcin, Stefan Gelcich et al.ARTICLEMarine Policy2024
The Ecology of Sandy Shores
Omar Defeo, Anton McLachlanBOOKEcology of Sandy Shores2025
Epilogue
Open AccessOmar Defeo, Anton McLachlanCHAPTEREcology of Sandy Shores2025
Towards an ecosystem approach to fisheries in the Galapagos Marine Reserve
Open AccessMauricio Castrejón, Omar DefeoARTICLEMarine Policy2025
Facing oceanographic, fisheries, and governance hotspots
Open AccessOmar Defeo, Bárbara C Franco et al.ARTICLEMarine Policy2025
The role of family in shaping adaptation and adaptive capacity in small-scale fishing communities
Open AccessFarah El-Shayeb, Jeremy Pittman et al.ARTICLEJournal of Rural Studies2025Cited by: 1References: 3
Social–ecological network analysis of governance gaps in a newly designated marine protected area of the Global South
Open AccessFederico Fraga, Omar Defeo et al.ARTICLEMarine Policy2026
Effective Marine Protected Areas (MPAs) depend on governance arrangements that are well-aligned with the dynamics of the social–ecological systems they aim to manage. However, baseline assessments at the time of MPA designation often prioritize ecological and biological data, while social dimensions tend to receive less attention, limiting opportunities to inform early management planning. To address this gap, we applied Social–Ecological Network…