Juan Carlos Villaseñor-Derbez

Juan Carlos Villaseñor-Derbez
University of California, Santa Barbara | UCSB · Bren School of Environmental Science and Management

Master of Environmental Science and Management

About

57
Publications
19,010
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221
Citations
Citations since 2017
41 Research Items
214 Citations
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Introduction
Juan Carlos holds a B.Sc. in Oceanography from Universidad Autónoma de Baja California and a Master of Environmental Science and Management degree, with a specialization in Coastal Marine Resources Management from UC Santa Barbara. He is a receipent of the Latin American Fisheries Fellowship and the UCMexus - CONACyT Doctoral Fellowship. Ecological modeling, marine reserve design, and fisheries management strategies under climate change are among his main research interests.
Additional affiliations
March 2015 - August 2015
Comunidad y Biodiversidad A.C.
Position
  • Marine Reserves Assistant
Description
  • Data analysis and production of scientific papers. Organizing and executing fieldwork along monitoring sites in the Pacific Ocean. Scientific diving, monitor diver and scientific diving instruction to our partners.
February 2015 - June 2015
FIDEMAR
Position
  • Consultant
Description
  • Data analysis on null sets, captures and size structure of yellowfin tuna captured by the Mexican Tuna Fleet.
November 2011 - February 2015
Autonomous University of Baja California
Position
  • Scientific Diver
Education
September 2015 - June 2017
University of California, Santa Barbara
Field of study
  • Coastal Marine Resource Management
August 2011 - December 2014

Publications

Publications (57)
Article
Full-text available
Marine reserves are implemented to achieve a variety of objectives, but are seldom rigorously evaluated to determine whether those objectives are met. In the rare cases when evaluations do take place, they typically focus on ecological indicators and ignore other relevant objectives such as socioeconomics and governance. And regardless of the objec...
Article
Full-text available
Numerous location-based diet studies have been published describing different aspects of invasive lionfish (Pterois volitans and Pterois miles) feeding ecology, but there has been no synthesis of their diet composition and feeding patterns across regional gradients. 8125 lionfish stomachs collected from 10 locations were analyzed to provide a gener...
Article
Full-text available
Lionfish (Pterois volitans/miles) are an invasive species in the Western Atlantic and the Caribbean. Improving management of invasive lionfish populations requires accurate total biomass estimates, which depend on accurate estimates of allometric growth; sedentary species like lionfish often exhibit high levels of spatial variation in life history...
Article
Full-text available
To conserve marine biodiversity, we must first understand the spatial distribution and status of at‐risk biodiversity. We combined range maps and conservation status for 5,291 marine species to map the global distribution of extinction risk of marine biodiversity. We find that for 83% of the ocean, >25% of assessed species are considered threatened...
Article
Full-text available
The great whales (baleen and sperm whales), through their massive size and wide distribution, influence ecosystem and carbon dynamics. Whales directly store carbon in their biomass and contribute to carbon export through sinking carcasses. Whale excreta may stimulate phytoplankton growth and capture atmospheric CO2; such indirect pathways represent...
Article
Full-text available
Most small-scale fisheries (SSFs) in the developing world are exploited by rural communities, but global trends in coastal urbanization and development are rapidly transforming many SSF landscapes. The implications for livelihood resilience, or the capacity of a livelihood to overcome shocks and stresses, remain unknown. The environmental and econo...
Article
Full-text available
As a member of the "High Level Panel for a Sustainable Ocean Economy", Mexico has committed to expand community-based marine conservation. We draw from more than two decades of experience to outline how existing resources may be leveraged to help inform the country's ambitious conservation plans. A total of 514.12 km 2 have already been protected u...
Article
Full-text available
Moored fish aggregating devices (MFADs) are promoted in small-scale fisheries around the world as tools to increase fisher incomes, enhance food security, and ease pressure on degraded inshore fisheries. Despite their growing popularity, the biophysical and socioeconomic contexts in which MFAD fisheries are implemented - and the implications of the...
Preprint
Full-text available
Climate-smart conservation addresses the vulnerability of biodiversity to climate change impacts but may require transboundary considerations. Here, we adapt and refine 16 biophysical guidelines for climate-smart marine reserves for the transboundary California Bight ecoregion. We link several climate-adaptation strategies (e.g., maintaining connec...
Article
Full-text available
Marine protected areas (MPAs) are an important tool for conservation but can be victims of their own success—higher fish biomass within MPAs create incentives to poach. This insight underpins the finding that fishing persists in most MPAs worldwide, and it raises questions about MPA monitoring and enforcement. We propose a novel institution to enha...
Article
Full-text available
Coastal marine ecosystems face a host of pressures from both offshore and land-based human activity. Research on terrestrial threats to coastal ecosystems has primarily focused on agricultural runoff, specifically showcasing how fertilizers and livestock waste create coastal eutrophication, harmful algae blooms, or hypoxic or anoxic zones. These im...
Article
Full-text available
Co-operation in the management of shared fish stocks is often necessary to achieve sustainability and reduce uncertainty. The United States of America (USA) and Mexico share a number of fish stocks and marine ecosystems, while there is some binational co-operation in scientific research, unilateral management decisions are generally the rule. We pr...
Article
Moored fish aggregating devices (MFADs) are promoted throughout global small-scale fisheries as tools to enhance livelihoods and shift fishing pressure onto offshore resources. A particularly large number of projects initiating and encouraging MFAD development have occurred in the Caribbean region. Despite ongoing promotion of MFAD fisheries in the...
Article
Full-text available
It is commonly agreed that marine conservation should expand considerably around the world. However, most countries have not yet implemented large-scale no-take Marine Protected Areas (MPAs). When a country closes a large fraction of its waters to fishing, it stands to lose a considerable level of fishery revenue. Although biodiversity and spillove...
Article
Full-text available
Two of the largest protected areas on earth are U.S. National Monuments in the Pacific Ocean. Numerous claims have been made about the impacts of these protected areas on the fishing industry, but there has been no ex post empirical evaluation of their effects. We use administrative data documenting individual fishing events to evaluate the economi...
Preprint
Full-text available
Coastal marine ecosystems provide livelihoods for small-scale fishers and coastal communities around the world. Small-scale fisheries face great challenges since they are difficult to monitor, enforce, and manage, which may lead to overexploitation. Combining territorial use rights for fisheries (TURF) with no-take marine reserves to create TURF-re...
Article
Full-text available
Coastal marine ecosystems provide livelihoods for small-scale fishers and coastal communities around the world. Small-scale fisheries face great challenges since they are difficult to monitor, enforce, and manage, which may lead to overexploitation. Combining territorial use rights for fisheries (TURF) with no-take marine reserves to create TURF-re...
Preprint
To conserve marine biodiversity, we must first understand the spatial distribution and status of at-risk biodiversity. We combined range maps and conservation status for 5,291 marine species to map the global distribution of extinction risk of marine biodiversity. We find that for 83% of the ocean, >25% of assessed species are considered threatened...
Preprint
Full-text available
Lionfish (Pterois volitans/miles) are an invasive species in the Western Atlantic and the Caribbean. Improving management of invasive lionfish populations requires accurate total biomass estimates, which depend on accurate estimates of allometric growth; sedentary species like lionfish often exhibit high levels of spatial variation in life history...
Data
Information about organisms sampled by Villaseñor-Derbez and Herrera-Pérez, 2014 Coordinates, minimum, maximum and mean depth (m), and number of samples for each location.
Data
Extension of data from Table 1 in the main text Summary of 18 allometric growth parameters available for lionfish in the invaded range from peer-reviewed literature and this study. All parameters have been adjusted to convert from millimeters to grams. n =Sample size, Sex specifies whether data was presented for Females (F), Males (M), or both gend...
Data
Log-log plot of the 18 length-weight relationships Log-log transformation of the length-weight relationships ( n = 18) for 12 studies and this study. The curves are shown for the range of lengths reported in each study (See Table S2); when ranges were not present, we use the ones found in this study (34 mm–310 mm). Colors indicate studies from whic...
Preprint
Full-text available
Lionfish ( Pterois volitans / miles ) are an invasive species in the Western Atlantic and the Caribbean. Improving management of invasive lionfish populations requires accurate total biomass estimates, which depend on accurate estimates of allometric growth. Sedentary species like lionfish often exhibit high levels of spatial variation in life hist...
Preprint
Lionfish ( Pterois volitans / miles ) are an invasive species in the Western Atlantic and the Caribbean. Improving management of invasive lionfish populations requires accurate total biomass estimates, which depend on accurate estimates of allometric growth. Sedentary species like lionfish often exhibit high levels of spatial variation in life hist...
Book
Full-text available
PRESENTACIÓN Este documento está dirigido a guiar la obtención de información a través del monitoreo biológico-pesquero del mero gigante (Stereolepis gigas) en aguas mexicanas. La información obtenida servirá para establecer la base del conocimiento biológico y ecológico de la especie. Este documento y la información obtenida pertenecen a un progra...
Article
Full-text available
En México hay una gran variedad de ecosistemas marinos, entre ellos destacan por su belleza y función ecológica los arrecifes coralinos y rocosos, los manglares, los montes submarinos y las praderas de pastos marinos. sin embargo, otro ecosistema muy poco conocido pero de singular belleza y de gran importancia ecológica y socioeconómica son los bos...
Preprint
Full-text available
Marine reserves are implemented to achieve a variety of objectives, but are seldom rigorously evaluated to determine whether those objectives are met. In the rare cases when evaluations do take place, they typically focus on ecological indicators and ignore other relevant objectives such as socioeconomics and governance. And regardless of the objec...
Data
Survey to collect governance information from fishing communities. Spanish version. (PDF)
Data
Survey to collect governance information from fishing communities. English version. (PDF)
Data
Assigned values and reasoning of socioeconomic and governance indicators used to color-code the scorecard in MAREA. (PDF)
Chapter
Full-text available
El mero gigante es el pez óseo de ambientes costeros más grande en las costas de Baja California y California, llegando a medir hasta 2.5 metros y pesando hasta 256 kilogramos. Este pez es casi tan longevo como el ser humano, pues se ha estimado que pueden vivir al menos 76 años. Información histórica revela que este pez solía ser muy abundante y e...
Article
Full-text available
El mero gigante es el pez óseo de ambientes costeros más grande en las costas de Baja California y California, llegando a medir hasta 2.5 metros y pesando hasta 256 kilogramos. Este pez es casi tan longevo como el ser humano, pues se ha estimado que pueden vivir al menos 76 años. Información histórica revela que este pez solía ser muy abundante y e...
Research
Full-text available
Protocolo de monitoreo oceanográfico, con recomendaciones para sistemas de anclaje, mantenimiento y descarga de información
Research
Full-text available
This guidebook was created as part of the Master’s thesis at the Bren School of Environmental Science & Management, a graduate professional school at the University of California, Santa Barbara . The Master’s thesis consists of a project proposed by an organization that is willing to work with a group of students that seeks to solve a real environm...
Research
Full-text available
Esta guía fue creada como parte de la tesis de Maestría en la Bren School of Environmental Science & Management, una escuela para estudios de posgrado de la Universidad de California, Santa Barbara. La tesis de Maestría consiste en una organización interesada en trabajar con un grupo de estudiantes para resolver un problema ambiental real. Bajo pet...
Thesis
Full-text available
No-take reserves are often implemented to recover overfished stocks. In Mexico, the number of reserves has recently grown due to regulations that allow fishers to gain legal recognition of these areas. While the regulations include instructions for implementation, no guidelines are provided for monitoring or evaluating reserves. Comunidad y Biodive...
Poster
Full-text available
No-take marine reserves are often implemented to recover overfished stocks. The extent to which these reserves have met their objectives is unclear. Current methods for reserve evaluation are not standardized and rely solely on biological data, excluding the socioeconomic and governance dimensions. Existing frameworks do not provide a tool to perfo...
Article
Full-text available
Pomacanthids and Pomacentrids are mainly distributed in tropical and subtropical regions, and inhabit shallow rocky and coral reefs. Due to their colorful patterns and unusual body shapes, they have been widely targeted by aquarium fish trade; these species are of great commercial interest. Here we document the occurrence of one Pomacanthid (Holaca...
Article
Full-text available
Como parte del programa de observadores a bordo implementado por el PNAAPD, los observadores registran la longitud furcal de una porción de los organismos capturados en cada lance. Ésta información, junto con el tipo de lance, fecha y la georreferenciación nos permite identificar las distribuciones espaciotemporales de los atunes en el Pacífico Mex...
Article
Full-text available
Located in the central region of the west coast of Baja California Peninsula, the Cedros Archipelago consists of five continental islands (Cedros Island, Natividad, San Benito Este, Medio, and Oeste), with Cedros being the largest island in the Mexican Pacific. This archipelago represents the biogeographic transition zone between the temperate and...
Research
Full-text available
Located in the central region of the west coast of baja california peninsula, the cedros Archipelago consists of five continental islands (cedros island, natividad, San benito este, medio, and oeste), with cedros being the largest island in the mexican pacific. this archipelago represents the biogeographic transition zone between the temperate and...
Article
Full-text available
Located in the central region of the west coast of Baja California Peninsula, the Cedros Archipelago consists of five continental islands (Cedros Island, Natividad, San Benito Este, Medio, and Oeste), with Cedros being the largest island in the Mexican Pacific. This archipelago represents the biogeographic transition zone between the temperate and...
Conference Paper
Full-text available
Invasive lionfish (Pterois volitans/miles) have spread across much of the tropical and sub-tropical Western Atlantic, and their range continues to expand along the east coast of South America. Their diet is composed primarily of teleost fish, followed by shrimp and then other crustaceans. At local scales, lionfish have been shown to reduce benthic...
Article
Full-text available
Mitzi Leal buza científica hija de pescador abulonero de la Isla Natividad, ella ahora pesca datos y no abulones. 28 a Isla Natividad se encuentra localizada a 9.3 km de las costas de Punta Eugenia, Municipio de Mulegé, Baja California Sur. La isla tiene una longitud de 7 km, en la que viven no más de 500 personas, y de los cuales 80 forman parte d...
Article
Full-text available
The world tuna fishing fleet is dominated by purse seine boats. Purse seine sets are sometimes unsuccessful in capturing fish; these unsuccessful attempts are known as null sets. Null sets have been widely documented and the numbers indicate that they happen in large proportions. In Mexico, the tuna fishery represents the second most important fish...
Thesis
Full-text available
La pesca comercial tradicionalmente se enfoca en las tallas mayores, que producen una mayor utilidad por un esfuerzo pesquero relativamente similar. Toda vez que la pesca se dirige a individuos de tallas grandes, se estima que la aplicación de un esfuerzo pesquero diferencial a gran escala geográfica puede resultar en estructuras de tallas diferent...
Article
Full-text available
Data collected during annual surveys (2010-2014; no data for 2013 due to a hurricane) shows that grouper and bass abundances within the MR reached 114 fish counted, 1.58 times higher than in non-protected areas. This, along with larger-sized organisms, accounts for the MR having a biomass of 0.88 T/hectare; 1.4 times higher than fished sites.
Article
Full-text available
Stomach contents were analyzed from 109 individuals. A total of 4 Genera and 14 Species were identified. Crustaceans accounted for %N=67.39% , %IRI= 86.37% of the total identified taxa and Teleosts %N=32.61% (%IRI = 13.63%). An ontogenetic change was observed in P. volitans diet. Resumen. Se analizaron contenidos estomacales de 109 individuos. Se...
Article
Full-text available
Especies ¿Dónde viven los peces? Comparando el dosel de algas con el sotobosque Buzos entrenados identifican, cuentan y calculan el tamaño de los peces a lo largo de áreas prospectadas mediante transectos y escriben todo en pizarras bajo el agua. Nuestro protocolo se ha diseñado para que coincida con los métodos de investigación similares (CRANE y...
Article
Full-text available
Since 2011 the Kelp Forests Ecology Group (scientists and students from the IIO and FCM at Universidad Autónoma de Baja California) have traveled more than 500 km of Baja California’s Pacific coastline, exploring and documenting the peninsular’s kelp forest species. To date, 22 different sites have been visited, with over 150 dives undertaken (a to...
Conference Paper
Full-text available
Los peces león del Indo-Pacífico [Pterois volitans (Linnaeus 1758): Scorpaenidae] son los primeros peces marinos no nativos en establecerse en el Atlántico Noreste. El rango nativo de P. volitans corresponde con el océano Pacífico desde el sur de Japón hasta Micronesia, Australia y Filipinas, y gran parte de al este de la Polinesia francesa. Este p...

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Projects

Projects (5)
Project
Ecological, fisheries, and economic studies of invasive lionfish
Project
(por definir)
Project
Investigations of potential ecological & economic impacts of lionfish.