Browsing by Author "Gelcich Crossley, Stefan"

Now showing 1 - 7 of 7
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    Anticipating trade-offs and promoting synergies between small-scale fisheries and aquaculture to improve social, economic, and ecological outcomes
    (2024) Mansfield, Elizabeth J.; Micheli, Fiorenza; Fujita, Rod; Fulton, Elizabeth A.; Gelcich Crossley, Stefan; Battista, Willow; Bustamante, Rodrigo H.; Cao, Ling; Daniels, Benjamin N.; Finkbeiner, Elena M.; Gaines, Steven; Peckham, Hoyt; Roche, Kelly; Ruckelshaus, Mary; Salomon, Anne K.; Sumaila, U. Rashid; White, Crow; Naylor,Rosamond
    Blue food systems are crucial for meeting global social and environmental goals. Both small-scale marine fisheries (SSFs) and aquaculture contribute to these goals, with SSFs supporting hundreds of millions of people and aquaculture currently expanding in the marine environment. Here we examine the interactions between SSFs and aquaculture, and the possible combined benefits and trade-offs of these interactions, along three pathways: (1) resource access and rights allocation; (2) markets and supply chains; and (3) exposure to and management of risks. Analysis of 46 diverse case studies showcase positive and negative interaction outcomes, often through competition for space or in the marketplace, which are context-dependent and determined by multiple factors, as further corroborated by qualitative modeling. Results of our mixed methods approach underscore the need to anticipate and manage interactions between SSFs and aquaculture deliberately to avoid negative socio-economic and environmental outcomes, promote synergies to enhance food production and other benefits, and ensure equitable benefit distribution.
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    Biodiversidad y cambio climático en Chile: Evidencia científica para la toma de decisiones. Informe de la mesa de Biodiversidad
    (Comité Científico COP25; Ministerio de Ciencia, Tecnología, Conocimiento e Innovación., 2025) Marquet Iturriaga, Pablo Angel; Altamirano, Adison; Arroyo, Mary T. K.; Fernandez Bergia, Miriam Ethel; Gelcich Crossley, Stefan; Górski, Konrad; Habit, Evelyn; Lara, Antonio; Maass Martínez, Alejandro Ignacio; Pauchard, Aníbal; Pliscoff Varas, Patricio Andres; Samaniego Salinas, Horacio Augusto; Smith Ramirez, Cecilia Del Carmen
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    Escape behavior of rocky-reef fish reveals the impact of spearfishing across different management regimes
    (WILEY, 2024) Contreras Drey, Francisco Javier; Godoy Salinas, Natalio Eduardo; Marambio Smith, Juan Andrés; Rezende Landaeta, Enrico; Perez Matus, Alejandro Augusto; Estevez Weinstein, Rodrigo Antonio; Do O De Oliveira Beldade, Manuel Ricardo; Ojeda Rossi, Federico Patricio; Gelcich Crossley, Stefan
    Flight initiation distance (FID), the distance at which an organism begins to flee from an approaching threat, is a major component of antipredator escape behavior and a potential indicator of threat perception in fishes. In this study, we analyzed the FID of three important rocky-reef fish species targeted by spearfishers, which are of commercial and recreational importance. We tested predictions that FID to a diver threat increases with the following factors: (1) fish body size, (2) less restricted access regimes, and (3) increased historical fishing pressure. We studied three size ranges of three rocky-reef fish species, in three different access regimes (i.e., open access, territorial user rights for fishery areas, no-take marine protected areas), and in two regions (northern and central region with different levels of fishing pressure depending on the species). We conducted an ANOVA to analyze pairwise interactions. We used the mean square criterion to select the models that best explained the variation of our response variable. Our findings indicate that FID can be distinctly elucidated by factors such as individual size, species, access regimes, and regions. Additionally, our models show that interactions involving regions and either species or size further contribute to explain FID variability. FID was higher in larger fishes and those of higher commercial value, outside marine reserves and in the region with the highest historical fishing pressures (based on landings data). This study supports the predictions that increased FID is associated with the threat posed by spearfishing activities. Furthermore, our findings indicate that spearfishing may already be altering the behavior of rocky-reef fishes on the north-central coast of Chile.
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    Mainstreaming voluntary marine conservation programs: Insights from TURF-Reserves
    (Open Book Publishers, 2025) Gelcich Crossley, Stefan; Donlan, Josh Donlan; Lagos, Benjamin; Sanchez Grez, Rodrigo; Estevez, Rodrigo A.
    Stefan Gelcich, C. Josh Donlan, Benjamin Lagos, Rodrigo Sanchez Grez, and Rodrigo A. Estévez, present the case for voluntary marine conservation programs in which local fishers are granted property rights to manage their local fisheries. This case is classic in marine conservation and related to TURF-Reserves in Chile. Territorial Use Rights Fisheries grant local fishing communities rights to assess and manage their own fisheries and to benefit from more sustainable management decisions. This case and other like cases around the globe have been most often applied to relatively sedentary benthic resources like mollusks and crustaceans. This and other cases show the power of Elinor Ostrom’s theories and the flaws in Garrett Hardin’s tragedy of the commons.
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    Marine ecosystem-based management: challenges remain, yet solutions exist, and progress is occurring
    (2024) Haugen, J. B.; Link, J. S.; Cribari, K.; Bundy, A.; Dickey-Collas, M.; Leslie, H. M.; Hall, J.; Fulton, E. A; Levenson, J. J.; Parsons, D. M.; Hassellöv, I.-M; Olsen, E.; DePiper, G. S.; Gentry, R. R; Clark, D. E.; Brainard, R. E.; Mateos-Molina, D.; Borja, A.; Gelcich Crossley, Stefan; Guilhon, M.
    Marine ecosystem-based management (EBM) is recognized as the best practice for managing multiple ocean-use sectors, explicitly addressing tradeoffs among them. However, implementation is perceived as challenging and often slow. A poll of over 150 international EBM experts revealed progress, challenges, and solutions in EBM implementation worldwide. Subsequent follow-up discussions with over 40 of these experts identified remaining impediments to further implementation of EBM: governance; stakeholder engagement; support; uncertainty about and understanding of EBM; technology and data; communication and marketing. EBM is often portrayed as too complex or too challenging to be fully implemented, but we report that identifiable and achievable solutions exist (e.g., political will, persistence, capacity building, changing incentives, and strategic marketing of EBM), for most of these challenges and some solutions can solve many impediments simultaneously. Furthermore, we are advancing in key components of EBM by practitioners who may not necessarily realize they are doing so under different paradigms. These findings indicate substantial progress on EBM, more than previously reported.
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    Pan traps: An effective tool for monitoring phenological changes in insect floral visitors and their relationship with floral resources in a coastal Mediterranean forest
    (2024) Chinga Chamorro, Javiera Beatriz; Murúa, M.; Barahona-Segovia, R.M.; Gelcich Crossley, Stefan
    Precise monitoring of insect floral visitors and their relationship with floral resources throughout the flowering season provides baseline information to help us understand long-term changes in plant-pollinator interactions and improve pollinator conservation strategies. Pan traps are one of the methods most used for monitoring insect floral visitors and several studies have already linked the abundance and richness of these floral visitors with floral resources. However, less research has been conducted into the effectiveness of pan traps for monitoring phenological changes in the floral visitor community with regard to floral resources. We used pan traps to study the species composition and the abundance of insect floral visitors and their relationship with flower richness in a coastal forest throughout the entire flowering season for two consecutive years. Captures were confirmed to be floral visitors through field survey studies. Pan traps were effective for revealing changes in the abundance and species composition of floral visitor communities during and between years that correlated with changes in floral richness and species composition. Changes in floral visitor abundance showed a different bias in their association with floral richness. Thus, while Hymenoptera and Diptera abundance tended to be negatively correlated with floral richness, Coleoptera abundance tended to be positively correlated, although such correlations could change from year to year. There were two significantly different groups of flowering plant and floral visitor species: one in spring and the other in summer. Each period was characterized by unique overlap between some floral visitors and their floral resources, suggesting that to monitor floral visitors effectively both communities need to be considered. Interestingly, the floral phenology in this coastal forest extended longer than that of more inland communities, so reliable monitoring of floral visitors throughout the floral season may help us to better understand the role of coastal plant communities in the stabilization of the pollinator networks of more inland communities. Overall, phenology patterns need to be taken into account for pan trapping to become an effective methodology for monitoring floral visitor communities, considering both intra-year (spring and summer communities) and inter-year variations.
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    Reporte cumplimiento SECOS 2025: reporte cumplimiento compromisos Pdte. Gabriel Boric (2022-2026) en pesca artesanal, acuicultura y desarrollo costero
    (Instituto Milenio en Socio-Ecología Costera (SECOS), 2025) Gelcich Crossley, Stefan; Haye, Pilar; Barra, Ricardo ; Broitman, Bernardo; Contreras-Porcia, Loretto; Estévez, Rodrigo; Farías, Laura; Martínez Reyes, Carolina del Pilar; Oyarzún, Fernanda; Reyes-Mendy, Francisca ; Vargas, Cristian; Felipe Vásquez, Felipe; Reyes Mendy, Francisca; Muñoz Godoy, Nicolás; Centro UC CAPES. Center of Applied Ecology & Sustainability
    Este reporte es parte del Observatorio de Políticas Públicas del Instituto Milenio en Socio-Ecología Costera (SECOS) y fue desarrollado por la Unidad de Ciencia y Políticas Públicas con el objetivo de realizar el seguimiento del cumplimiento y actualización de los compromisos que el presidente Gabriel Boric ha realizado en su programa de gobierno y documentos relevantes, para cada uno de los tres sistemas socio-ecológicos que son parte de SECOS: Pesca Artesanal, Acuicultura de Pequeña Escala y Desarrollo Costero. Desde el inicio de la administración del presidente Boric, se han identificado 44 compromisos presidenciales en los ámbitos de pesca artesanal, acuicultura de pequeña escala y desarrollo costero. Estos compromisos fueron recogidos tanto en el programa de gobierno como en sus cuentas públicas (2022, 2023 y 2024) y en otros documentos de política pública, como los acuerdos establecidos con organizaciones de pescadores artesanales en junio de 2022. Del total de compromisos registrados, 14 se encuentran cumplidos, 28 en proceso y 2 sin avances.