2026
Vega-Camarena, José P.; Brito-Castillo, Luis; Farfán, Luis M.; Avalos-Cueva, David; Palacios-Hernández, Emilio; Monzón, Cesar O.
Evaluation of the CHIRPS Database in Association with Major Hurricanes in Mexico Journal Article
In: Atmosphere, vol. 17, no. 2, pp. 118, 2026, ISSN: 2073-4433.
@article{vega-camarena_evaluation_2026,
title = {Evaluation of the CHIRPS Database in Association with Major Hurricanes in Mexico},
author = { José P. Vega-Camarena and Luis Brito-Castillo and Luis M. Farfán and David Avalos-Cueva and Emilio Palacios-Hernández and Cesar O. Monzón},
url = {https://www.mdpi.com/2073-4433/17/2/118},
doi = {10.3390/atmos17020118},
issn = {2073-4433},
year = {2026},
date = {2026-01-01},
urldate = {2026-01-23},
journal = {Atmosphere},
volume = {17},
number = {2},
pages = {118},
abstract = {Due to the lack of in situ observations in mountainous locations, the use of remote sensing data is an alternative to analyze rainfall distribution patterns during the passage of major hurricanes. In this work, gridded precipitation data from the CHIRPS database are evaluated by comparing with observations from weather stations during the passage of category 3–5 hurricanes for the period 1980–2024. The comparison between estimated and observed values is performed by regression analysis and the use of K and K0 coefficients. An advantage of using K-ratio and K0-ratio is the identification of overestimated or underestimated precipitation in the pixel records. The distribution of daily precipitation helped in a more concise way to better understand how well CHIRPS reproduced the observed rainfall patterns. Results show that correlations between observations and database estimates are in the range of 0.40–0.76, for eastern Pacific hurricanes, and 0.49–0.78 for Atlantic hurricanes, all of which are statistically significant; however, these results do not imply congruence between observations and estimates since CHIRPS fails to adequately reproduce the position of the highest precipitation core. In the initial stages of a tropical cyclone, near-zero correlations between observations and estimates indicate that CHIRPS is not able to reproduce the observed rainfall. It is recommended to use CHIRPS with caution when the focus is on analyzing rainfall patterns during the development of intense tropical cyclones.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Due to the lack of in situ observations in mountainous locations, the use of remote sensing data is an alternative to analyze rainfall distribution patterns during the passage of major hurricanes. In this work, gridded precipitation data from the CHIRPS database are evaluated by comparing with observations from weather stations during the passage of category 3–5 hurricanes for the period 1980–2024. The comparison between estimated and observed values is performed by regression analysis and the use of K and K0 coefficients. An advantage of using K-ratio and K0-ratio is the identification of overestimated or underestimated precipitation in the pixel records. The distribution of daily precipitation helped in a more concise way to better understand how well CHIRPS reproduced the observed rainfall patterns. Results show that correlations between observations and database estimates are in the range of 0.40–0.76, for eastern Pacific hurricanes, and 0.49–0.78 for Atlantic hurricanes, all of which are statistically significant; however, these results do not imply congruence between observations and estimates since CHIRPS fails to adequately reproduce the position of the highest precipitation core. In the initial stages of a tropical cyclone, near-zero correlations between observations and estimates indicate that CHIRPS is not able to reproduce the observed rainfall. It is recommended to use CHIRPS with caution when the focus is on analyzing rainfall patterns during the development of intense tropical cyclones.
Arredondo‐Sáinz, Joel A.; Pérez‐Puig, Héctor; Pardo, Mario A.; Heckel, Gisela
Abundance and Temporal Trends of Fin Whales in the Eastern Midriff Islands Region, Gulf of California, Mexico Journal Article
In: Marine Mammal Science, vol. 42, no. 1, pp. e70129, 2026, ISSN: 0824-0469, 1748-7692.
@article{arredondosainz_abundance_2026,
title = {Abundance and Temporal Trends of Fin Whales in the Eastern Midriff Islands Region, Gulf of California, Mexico},
author = { Joel A. Arredondo‐Sáinz and Héctor Pérez‐Puig and Mario A. Pardo and Gisela Heckel},
url = {https://onlinelibrary.wiley.com/doi/10.1111/mms.70129},
doi = {10.1111/mms.70129},
issn = {0824-0469, 1748-7692},
year = {2026},
date = {2026-01-01},
urldate = {2026-01-23},
journal = {Marine Mammal Science},
volume = {42},
number = {1},
pages = {e70129},
abstract = {ABSTRACT
The fin whales ( Balaenoptera physalus ) in the Gulf of California comprise a resident population genetically isolated from the rest of the North Pacific. The species occurs in the Eastern Midriff Islands Region (EMIR), in the central Gulf of California. The present study estimated fin whale abundance and apparent survival using photo‐identification data collected via weekly small‐boat surveys conducted from 2009 to 2017. In total, 1082 fin whales were recorded during 287 surveys that totaled 1924 h of research effort. After a photo comparison process of the dorsal fin, 376 unique individuals were identified, of which 180 had distinct features and high‐quality photos to be included in the mark‐recapture analysis. A mark ratio of 0.615 was obtained. A Jolly–Seber/POPAN mark‐recapture model yielded a superpopulation size of = 360 (SE Un = 34.4, 95% CI [304–429]). The estimates for the years 2010–2016 were similar, from 178 (95% CI [185–363]) to 259 (95% CI [179–375]). A Cormack‐Jolly‐Seber model was used to estimate probability of survival. A hierarchical Bayesian time series analysis of encounter rates collected from 2012 to 2017 showed evidence of seasonality, with whales mostly present during the cold season (December–May), which coincides with the local upwelling regime. This information adds to the value of the EMIR as an important area for fin whale conservation in the Gulf of California.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
ABSTRACT
The fin whales ( Balaenoptera physalus ) in the Gulf of California comprise a resident population genetically isolated from the rest of the North Pacific. The species occurs in the Eastern Midriff Islands Region (EMIR), in the central Gulf of California. The present study estimated fin whale abundance and apparent survival using photo‐identification data collected via weekly small‐boat surveys conducted from 2009 to 2017. In total, 1082 fin whales were recorded during 287 surveys that totaled 1924 h of research effort. After a photo comparison process of the dorsal fin, 376 unique individuals were identified, of which 180 had distinct features and high‐quality photos to be included in the mark‐recapture analysis. A mark ratio of 0.615 was obtained. A Jolly–Seber/POPAN mark‐recapture model yielded a superpopulation size of = 360 (SE Un = 34.4, 95% CI [304–429]). The estimates for the years 2010–2016 were similar, from 178 (95% CI [185–363]) to 259 (95% CI [179–375]). A Cormack‐Jolly‐Seber model was used to estimate probability of survival. A hierarchical Bayesian time series analysis of encounter rates collected from 2012 to 2017 showed evidence of seasonality, with whales mostly present during the cold season (December–May), which coincides with the local upwelling regime. This information adds to the value of the EMIR as an important area for fin whale conservation in the Gulf of California.
The fin whales ( Balaenoptera physalus ) in the Gulf of California comprise a resident population genetically isolated from the rest of the North Pacific. The species occurs in the Eastern Midriff Islands Region (EMIR), in the central Gulf of California. The present study estimated fin whale abundance and apparent survival using photo‐identification data collected via weekly small‐boat surveys conducted from 2009 to 2017. In total, 1082 fin whales were recorded during 287 surveys that totaled 1924 h of research effort. After a photo comparison process of the dorsal fin, 376 unique individuals were identified, of which 180 had distinct features and high‐quality photos to be included in the mark‐recapture analysis. A mark ratio of 0.615 was obtained. A Jolly–Seber/POPAN mark‐recapture model yielded a superpopulation size of = 360 (SE Un = 34.4, 95% CI [304–429]). The estimates for the years 2010–2016 were similar, from 178 (95% CI [185–363]) to 259 (95% CI [179–375]). A Cormack‐Jolly‐Seber model was used to estimate probability of survival. A hierarchical Bayesian time series analysis of encounter rates collected from 2012 to 2017 showed evidence of seasonality, with whales mostly present during the cold season (December–May), which coincides with the local upwelling regime. This information adds to the value of the EMIR as an important area for fin whale conservation in the Gulf of California.
Ruvalcaba-Aroche, Erick D.; Beier, Emilio; Sánchez-Velasco, Laura
Thermal fronts variability in the Pacific off Mexico and their impact on chlorophyll Journal Article
In: Continental Shelf Research, vol. 296, pp. 105600, 2026, ISSN: 02784343.
@article{ruvalcaba-aroche_thermal_2026,
title = {Thermal fronts variability in the Pacific off Mexico and their impact on chlorophyll},
author = { Erick D. Ruvalcaba-Aroche and Emilio Beier and Laura Sánchez-Velasco},
url = {https://linkinghub.elsevier.com/retrieve/pii/S0278434325002006},
doi = {10.1016/j.csr.2025.105600},
issn = {02784343},
year = {2026},
date = {2026-01-01},
urldate = {2026-01-23},
journal = {Continental Shelf Research},
volume = {296},
pages = {105600},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
2025
Avila-Cárdenas, Jaime Emmanuel; Llera-Herrera, Raúl; Castillo-Guerrero, José Alfredo; Palacios, Eduardo; Fernández, Guillermo
Population genetic structure of the American oystercatcher in Northwestern Mexico Journal Article
In: Conservation Genetics, vol. 26, no. 6, pp. 1127–1139, 2025, ISSN: 1566-0621, 1572-9737.
@article{avila-cardenas_population_2025,
title = {Population genetic structure of the American oystercatcher in Northwestern Mexico},
author = { Jaime Emmanuel Avila-Cárdenas and Raúl Llera-Herrera and José Alfredo Castillo-Guerrero and Eduardo Palacios and Guillermo Fernández},
url = {https://link.springer.com/10.1007/s10592-025-01726-x},
doi = {10.1007/s10592-025-01726-x},
issn = {1566-0621, 1572-9737},
year = {2025},
date = {2025-12-01},
urldate = {2026-01-23},
journal = {Conservation Genetics},
volume = {26},
number = {6},
pages = {1127–1139},
abstract = {Abstract
Assessments of genetic diversity and population structure are essential for defining management units to prioritize conservation and management efforts. A susbspecies of the American oystercatcher ( Haematopus palliatus frazari ) breeds in northwestern Mexico and is endangered due to its small population size, restricted distribution, and high vulnerability to anthropogenic activities. This study analyzed the genetic diversity and population structure of the American oystercatcher in six areas in northwestern Mexico. We used two molecular markers, the mtDNA control region and single nucleotide polymorphisms (SNPs), to calculate genetic diversity, population structure, the kinship coefficient, and migration rates among these geographic areas. Genetic diversity was high when calculated using mtDNA (h = 0.689) and relatively high for SNPs (h = 0.222). We identified genetic structure across geographic areas based on 1,889 SNPs. Individuals from the Baja California peninsula were genetically differentiated from those of the Sonora and Sinaloa populations. Indeed, the population of the Baja California peninsula can be considered a distinct demographic unit. This may be explained by high philopatry (low dispersal and recruitment of breeders) and regional habitat discontinuity (Sonora and Sinaloa were similar but different from the Baja California peninsula). Of note, the Bahia Santa María (Sinaloa) population serves as a source of individuals to other populations in the region. We recommend that conservation efforts prioritize major concentration sites, such as Bahia Santa María (Sinaloa), while also protecting smaller, isolated demographic units, such as the populations of Bahia de la Paz (Baja California Sur) and Bahia de Ceuta (Sinaloa).},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Abstract
Assessments of genetic diversity and population structure are essential for defining management units to prioritize conservation and management efforts. A susbspecies of the American oystercatcher ( Haematopus palliatus frazari ) breeds in northwestern Mexico and is endangered due to its small population size, restricted distribution, and high vulnerability to anthropogenic activities. This study analyzed the genetic diversity and population structure of the American oystercatcher in six areas in northwestern Mexico. We used two molecular markers, the mtDNA control region and single nucleotide polymorphisms (SNPs), to calculate genetic diversity, population structure, the kinship coefficient, and migration rates among these geographic areas. Genetic diversity was high when calculated using mtDNA (h = 0.689) and relatively high for SNPs (h = 0.222). We identified genetic structure across geographic areas based on 1,889 SNPs. Individuals from the Baja California peninsula were genetically differentiated from those of the Sonora and Sinaloa populations. Indeed, the population of the Baja California peninsula can be considered a distinct demographic unit. This may be explained by high philopatry (low dispersal and recruitment of breeders) and regional habitat discontinuity (Sonora and Sinaloa were similar but different from the Baja California peninsula). Of note, the Bahia Santa María (Sinaloa) population serves as a source of individuals to other populations in the region. We recommend that conservation efforts prioritize major concentration sites, such as Bahia Santa María (Sinaloa), while also protecting smaller, isolated demographic units, such as the populations of Bahia de la Paz (Baja California Sur) and Bahia de Ceuta (Sinaloa).
Assessments of genetic diversity and population structure are essential for defining management units to prioritize conservation and management efforts. A susbspecies of the American oystercatcher ( Haematopus palliatus frazari ) breeds in northwestern Mexico and is endangered due to its small population size, restricted distribution, and high vulnerability to anthropogenic activities. This study analyzed the genetic diversity and population structure of the American oystercatcher in six areas in northwestern Mexico. We used two molecular markers, the mtDNA control region and single nucleotide polymorphisms (SNPs), to calculate genetic diversity, population structure, the kinship coefficient, and migration rates among these geographic areas. Genetic diversity was high when calculated using mtDNA (h = 0.689) and relatively high for SNPs (h = 0.222). We identified genetic structure across geographic areas based on 1,889 SNPs. Individuals from the Baja California peninsula were genetically differentiated from those of the Sonora and Sinaloa populations. Indeed, the population of the Baja California peninsula can be considered a distinct demographic unit. This may be explained by high philopatry (low dispersal and recruitment of breeders) and regional habitat discontinuity (Sonora and Sinaloa were similar but different from the Baja California peninsula). Of note, the Bahia Santa María (Sinaloa) population serves as a source of individuals to other populations in the region. We recommend that conservation efforts prioritize major concentration sites, such as Bahia Santa María (Sinaloa), while also protecting smaller, isolated demographic units, such as the populations of Bahia de la Paz (Baja California Sur) and Bahia de Ceuta (Sinaloa).
Reiter, Matthew E; Hickey, Catherine M; Eusse-González, Diana; Palacios, Eduardo; Barbaree, Blake A; Bradley, David W; Angulo, Fernando; Dort, John Van; Fernández, Guillermo; Clay, Rob; Agreda, Ana; Morales, Salvadora; Reyes, Erika; Miró, Rosabel; Díaz, Yenifer; Kaufman, Karl; Galán, Victoria; González, Richard Johnston; Chu, James
Trends in nonbreeding shorebirds along the Pacific Americas Flyway Journal Article
In: Ornithological Applications, pp. duaf076, 2025, ISSN: 0010-5422, 2732-4621.
@article{reiter_trends_2025,
title = {Trends in nonbreeding shorebirds along the Pacific Americas Flyway},
author = { Matthew E Reiter and Catherine M Hickey and Diana Eusse-González and Eduardo Palacios and Blake A Barbaree and David W Bradley and Fernando Angulo and John Van Dort and Guillermo Fernández and Rob Clay and Ana Agreda and Salvadora Morales and Erika Reyes and Rosabel Miró and Yenifer Díaz and Karl Kaufman and Victoria Galán and Richard Johnston González and James Chu},
url = {https://academic.oup.com/condor/advance-article/doi/10.1093/ornithapp/duaf076/8317459},
doi = {10.1093/ornithapp/duaf076},
issn = {0010-5422, 2732-4621},
year = {2025},
date = {2025-11-01},
urldate = {2026-01-23},
journal = {Ornithological Applications},
pages = {duaf076},
abstract = {Abstract
Population trends for shorebirds that spend the nonbreeding period of their annual cycle along the Pacific Americas Flyway are largely unknown. However, localized studies within the Pacific Flyway and analyses from the Atlantic Flyway suggest many shorebird species may be declining in the Western Hemisphere. Herein, we present the first trends of nonbreeding shorebirds along the Pacific Americas Flyway based on a coordinated survey effort from across a large portion of the Flyway. We used 10 years of survey data collected annually (2012–2013 to 2021–2022) between November and February from 10 countries along the Pacific Coast of the Americas to assess population trends for 22 species. There was a mix of positive and negative trend estimates across species. Overall, 10 of 22 species had a significant negative trend; 7 were significant at the P < 0.05 level and an additional 3 species showed evidence of significant decline at the P < 0.15 significance level. Two species evaluated were significantly increasing at P < 0.05. Of 17 species evaluated with regional models, the directionality of trend estimates by species was broadly consistent between the North Temperate and Neotropical regions of the Flyway. However, for 5 species the directionality of the trends differed between regions. Overall, species with uncertain trends generally had lower numbers of survey events and units included in the analysis because often they were affiliated with habitats with relatively limited sampling. While there was still uncertainty in the trend estimates for some species, we have strong evidence that some species were significantly declining, and at least a couple were increasing during our study period. Our results provide critical information to guide the prioritization of conservation investments and further investigations into the causes of shorebird declines, as well as increases, at regional and flyway scales along the Pacific Americas Flyway.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Abstract
Population trends for shorebirds that spend the nonbreeding period of their annual cycle along the Pacific Americas Flyway are largely unknown. However, localized studies within the Pacific Flyway and analyses from the Atlantic Flyway suggest many shorebird species may be declining in the Western Hemisphere. Herein, we present the first trends of nonbreeding shorebirds along the Pacific Americas Flyway based on a coordinated survey effort from across a large portion of the Flyway. We used 10 years of survey data collected annually (2012–2013 to 2021–2022) between November and February from 10 countries along the Pacific Coast of the Americas to assess population trends for 22 species. There was a mix of positive and negative trend estimates across species. Overall, 10 of 22 species had a significant negative trend; 7 were significant at the P < 0.05 level and an additional 3 species showed evidence of significant decline at the P < 0.15 significance level. Two species evaluated were significantly increasing at P < 0.05. Of 17 species evaluated with regional models, the directionality of trend estimates by species was broadly consistent between the North Temperate and Neotropical regions of the Flyway. However, for 5 species the directionality of the trends differed between regions. Overall, species with uncertain trends generally had lower numbers of survey events and units included in the analysis because often they were affiliated with habitats with relatively limited sampling. While there was still uncertainty in the trend estimates for some species, we have strong evidence that some species were significantly declining, and at least a couple were increasing during our study period. Our results provide critical information to guide the prioritization of conservation investments and further investigations into the causes of shorebird declines, as well as increases, at regional and flyway scales along the Pacific Americas Flyway.
Population trends for shorebirds that spend the nonbreeding period of their annual cycle along the Pacific Americas Flyway are largely unknown. However, localized studies within the Pacific Flyway and analyses from the Atlantic Flyway suggest many shorebird species may be declining in the Western Hemisphere. Herein, we present the first trends of nonbreeding shorebirds along the Pacific Americas Flyway based on a coordinated survey effort from across a large portion of the Flyway. We used 10 years of survey data collected annually (2012–2013 to 2021–2022) between November and February from 10 countries along the Pacific Coast of the Americas to assess population trends for 22 species. There was a mix of positive and negative trend estimates across species. Overall, 10 of 22 species had a significant negative trend; 7 were significant at the P < 0.05 level and an additional 3 species showed evidence of significant decline at the P < 0.15 significance level. Two species evaluated were significantly increasing at P < 0.05. Of 17 species evaluated with regional models, the directionality of trend estimates by species was broadly consistent between the North Temperate and Neotropical regions of the Flyway. However, for 5 species the directionality of the trends differed between regions. Overall, species with uncertain trends generally had lower numbers of survey events and units included in the analysis because often they were affiliated with habitats with relatively limited sampling. While there was still uncertainty in the trend estimates for some species, we have strong evidence that some species were significantly declining, and at least a couple were increasing during our study period. Our results provide critical information to guide the prioritization of conservation investments and further investigations into the causes of shorebird declines, as well as increases, at regional and flyway scales along the Pacific Americas Flyway.
Rosas-Hernández, Martha P.; Albores-Barajas, Yuri V.; Soldatini, Cecilia; Catoni, Carlo; Dell’Omo, Giacomo; Rattenborg, Niels
Differential timing in the use of the oceanographic features of the California current system by two pelagic seabirds Journal Article
In: Marine Environmental Research, vol. 211, pp. 107423, 2025, ISSN: 01411136.
@article{rosas-hernandez_differential_2025,
title = {Differential timing in the use of the oceanographic features of the California current system by two pelagic seabirds},
author = { Martha P. Rosas-Hernández and Yuri V. Albores-Barajas and Cecilia Soldatini and Carlo Catoni and Giacomo Dell’Omo and Niels Rattenborg},
url = {https://linkinghub.elsevier.com/retrieve/pii/S0141113625004805},
doi = {10.1016/j.marenvres.2025.107423},
issn = {01411136},
year = {2025},
date = {2025-10-01},
urldate = {2026-01-23},
journal = {Marine Environmental Research},
volume = {211},
pages = {107423},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Espinoza-Rodríguez, Iyari Janethzy; Heckel, Gisela; Chávez-Dagostino, Rosa María; Moncada-Cooley, Roberto; Aguirre-Ayala, Daniel; Cupul-Magaña, Amilcar Leví
Compliance to whale watching regulation in Mexico: Implications for the activity's sustainability Journal Article
In: Ocean & Coastal Management, vol. 269, pp. 107798, 2025, ISSN: 09645691.
@article{espinoza-rodriguez_compliance_2025,
title = {Compliance to whale watching regulation in Mexico: Implications for the activity's sustainability},
author = { Iyari Janethzy Espinoza-Rodríguez and Gisela Heckel and Rosa María Chávez-Dagostino and Roberto Moncada-Cooley and Daniel Aguirre-Ayala and Amilcar Leví Cupul-Magaña},
url = {https://linkinghub.elsevier.com/retrieve/pii/S0964569125002601},
doi = {10.1016/j.ocecoaman.2025.107798},
issn = {09645691},
year = {2025},
date = {2025-10-01},
urldate = {2026-01-23},
journal = {Ocean & Coastal Management},
volume = {269},
pages = {107798},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Garcillán, Pedro P.; Dávila, Jahdai; Blázquez, María Del Carmen; Palacios, Eduardo; Gomis, Florent
Agua compartida, tiempos separados: partición espacio-temporal entre carnívoros en aguajes del noroeste árido de México Journal Article
In: ACTA ZOOLÓGICA MEXICANA (N.S.), pp. 1–18, 2025, ISSN: 2448-8445, 0065-1737.
@article{garcillan_agua_2025,
title = {Agua compartida, tiempos separados: partición espacio-temporal entre carnívoros en aguajes del noroeste árido de México},
author = { Pedro P. Garcillán and Jahdai Dávila and María Del Carmen Blázquez and Eduardo Palacios and Florent Gomis},
url = {https://azm.ojs.inecol.mx/index.php/azm/article/view/2770},
doi = {10.21829/azm.2025.4112770},
issn = {2448-8445, 0065-1737},
year = {2025},
date = {2025-09-01},
urldate = {2026-01-23},
journal = {ACTA ZOOLÓGICA MEXICANA (N.S.)},
pages = {1–18},
abstract = {En ecosistemas áridos, donde el agua es escasa y localizada, los aguajes permanentes son recursos críticos que concentran la actividad de los vertebrados terrestres y pueden intensificar las interacciones entre carnívoros. Sin embargo, se sabe poco sobre cómo estos gremios estructuran su coexistencia bajo condiciones estacionalmente variables. En este estudio analizamos el uso temporal y espacial de aguajes por cinco especies de carnívoros medianos y pequeños (coyote, lince, zorra, zorrillo y mapache) en un ecosistema árido del noroeste de México, a lo largo de dos años. Se utilizaron nueve cámaras activas que, en 5,931 noches-trampa, registraron 4,060 visitas. Estimamos la frecuencia diaria de visitas, los patrones horarios de actividad, el solapamiento temporal y la coocurrencia espacial a lo largo del año y entre estaciones de secas y de lluvias, así como su relación con la diferencia de tamaño entre especies. Coyote, lince y zorra incrementaron su frecuencia de visita en temporada seca, mientras que el zorrillo la mantuvo y el mapache la redujo. Las especies se agruparon en dos periodos de actividad: crepusculares (coyote y lince) y nocturnas (zorra, zorrillo y mapache), con mayor solapamiento entre especies dentro de cada periodo y menor entre ambos. No se detectaron cambios estacionales significativos en los patrones de actividad horaria entre pares de especies. La coocurrencia espacial fue menor a lo esperado por azar en ambas estaciones, lo que indica una evitación activa del uso simultáneo de los aguajes. La diferencia de tamaño se relacionó negativamente con el solapamiento temporal únicamente en la estación de lluvias, pero no se asoció con la magnitud de la evitación espacial en ningún periodo. Estos patrones sugieren que la coexistencia de carnívoros en ambientes áridos se sostiene mediante ajustes conductuales que reducen la probabilidad de encuentros directos. La partición temporal y espacial operan como mecanismos complementarios para reducir los conflictos en torno a recursos hídricos críticos.
,
In arid ecosystems, where water is scarce and localized, permanent waterholes are critical resources that concentrate the activity of terrestrial vertebrates and may intensify interactions among carnivores. However, little is known about how these guilds structure their coexistence around such sites under seasonally variable conditions. In this study, we analyzed the temporal and spatial use of waterholes by five species of medium- and small-sized carnivores (coyote, bobcat, gray fox, skunk, and raccoon) in an arid ecosystem in northwestern Mexico over two years. Nine camera traps recorded 4,060 detections across 5,931 trap-nights. We estimated daily visitation frequency, daily activity patterns, temporal overlap, and spatial co-occurrence among species throughout the year and between dry and rainy seasons, as well as their relationship with body size differences between speices. Coyotes, bobcats, and foxes increased their visitation rates during the dry season, while skunks maintained and raccoons reduced their visits. Species grouped into two main activity periods: crepuscular (coyote and bobcat) and nocturnal (fox, skunk, and raccoon), with high overlap within groups and moderate overlap between them. No significant seasonal changes were detected in activity patterns. Spatial co-occurrence was lower than expected in both seasons, indicating active avoidance of simultaneous use of waterholes. Body size differences were negatively related to temporal overlap only during the rainy season and showed no association with spatial avoidence. These patterns suggest that carnivore coexistence in arid environments is sustained through behavioral adjustments that minimize direct encounters. Temporal and spatial partitioning function as complementary mechanisms to reduce conflict over critical water resources.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
En ecosistemas áridos, donde el agua es escasa y localizada, los aguajes permanentes son recursos críticos que concentran la actividad de los vertebrados terrestres y pueden intensificar las interacciones entre carnívoros. Sin embargo, se sabe poco sobre cómo estos gremios estructuran su coexistencia bajo condiciones estacionalmente variables. En este estudio analizamos el uso temporal y espacial de aguajes por cinco especies de carnívoros medianos y pequeños (coyote, lince, zorra, zorrillo y mapache) en un ecosistema árido del noroeste de México, a lo largo de dos años. Se utilizaron nueve cámaras activas que, en 5,931 noches-trampa, registraron 4,060 visitas. Estimamos la frecuencia diaria de visitas, los patrones horarios de actividad, el solapamiento temporal y la coocurrencia espacial a lo largo del año y entre estaciones de secas y de lluvias, así como su relación con la diferencia de tamaño entre especies. Coyote, lince y zorra incrementaron su frecuencia de visita en temporada seca, mientras que el zorrillo la mantuvo y el mapache la redujo. Las especies se agruparon en dos periodos de actividad: crepusculares (coyote y lince) y nocturnas (zorra, zorrillo y mapache), con mayor solapamiento entre especies dentro de cada periodo y menor entre ambos. No se detectaron cambios estacionales significativos en los patrones de actividad horaria entre pares de especies. La coocurrencia espacial fue menor a lo esperado por azar en ambas estaciones, lo que indica una evitación activa del uso simultáneo de los aguajes. La diferencia de tamaño se relacionó negativamente con el solapamiento temporal únicamente en la estación de lluvias, pero no se asoció con la magnitud de la evitación espacial en ningún periodo. Estos patrones sugieren que la coexistencia de carnívoros en ambientes áridos se sostiene mediante ajustes conductuales que reducen la probabilidad de encuentros directos. La partición temporal y espacial operan como mecanismos complementarios para reducir los conflictos en torno a recursos hídricos críticos.
,
In arid ecosystems, where water is scarce and localized, permanent waterholes are critical resources that concentrate the activity of terrestrial vertebrates and may intensify interactions among carnivores. However, little is known about how these guilds structure their coexistence around such sites under seasonally variable conditions. In this study, we analyzed the temporal and spatial use of waterholes by five species of medium- and small-sized carnivores (coyote, bobcat, gray fox, skunk, and raccoon) in an arid ecosystem in northwestern Mexico over two years. Nine camera traps recorded 4,060 detections across 5,931 trap-nights. We estimated daily visitation frequency, daily activity patterns, temporal overlap, and spatial co-occurrence among species throughout the year and between dry and rainy seasons, as well as their relationship with body size differences between speices. Coyotes, bobcats, and foxes increased their visitation rates during the dry season, while skunks maintained and raccoons reduced their visits. Species grouped into two main activity periods: crepuscular (coyote and bobcat) and nocturnal (fox, skunk, and raccoon), with high overlap within groups and moderate overlap between them. No significant seasonal changes were detected in activity patterns. Spatial co-occurrence was lower than expected in both seasons, indicating active avoidance of simultaneous use of waterholes. Body size differences were negatively related to temporal overlap only during the rainy season and showed no association with spatial avoidence. These patterns suggest that carnivore coexistence in arid environments is sustained through behavioral adjustments that minimize direct encounters. Temporal and spatial partitioning function as complementary mechanisms to reduce conflict over critical water resources.
,
In arid ecosystems, where water is scarce and localized, permanent waterholes are critical resources that concentrate the activity of terrestrial vertebrates and may intensify interactions among carnivores. However, little is known about how these guilds structure their coexistence around such sites under seasonally variable conditions. In this study, we analyzed the temporal and spatial use of waterholes by five species of medium- and small-sized carnivores (coyote, bobcat, gray fox, skunk, and raccoon) in an arid ecosystem in northwestern Mexico over two years. Nine camera traps recorded 4,060 detections across 5,931 trap-nights. We estimated daily visitation frequency, daily activity patterns, temporal overlap, and spatial co-occurrence among species throughout the year and between dry and rainy seasons, as well as their relationship with body size differences between speices. Coyotes, bobcats, and foxes increased their visitation rates during the dry season, while skunks maintained and raccoons reduced their visits. Species grouped into two main activity periods: crepuscular (coyote and bobcat) and nocturnal (fox, skunk, and raccoon), with high overlap within groups and moderate overlap between them. No significant seasonal changes were detected in activity patterns. Spatial co-occurrence was lower than expected in both seasons, indicating active avoidance of simultaneous use of waterholes. Body size differences were negatively related to temporal overlap only during the rainy season and showed no association with spatial avoidence. These patterns suggest that carnivore coexistence in arid environments is sustained through behavioral adjustments that minimize direct encounters. Temporal and spatial partitioning function as complementary mechanisms to reduce conflict over critical water resources.
Abaunza, Gemma; López-Hernández, Joel Aarón; Soldatini, Cecilia; Albores-Barajas, Yuri Vladimir
Unexpected Alliances: Same-Sex Parenting in the Black-Vented Shearwater Journal Article
In: Ardea, vol. 113, no. 1, 2025, ISSN: 0373-2266.
@article{abaunza_unexpected_2025,
title = {Unexpected Alliances: Same-Sex Parenting in the Black-Vented Shearwater},
author = { Gemma Abaunza and Joel Aarón López-Hernández and Cecilia Soldatini and Yuri Vladimir Albores-Barajas},
url = {https://bioone.org/journals/ardea/volume-113/issue-1/arde.2025.a4/Unexpected-Alliances–Same-Sex-Parenting-in-the-Black-Vented/10.5253/arde.2025.a4.full},
doi = {10.5253/arde.2025.a4},
issn = {0373-2266},
year = {2025},
date = {2025-09-01},
urldate = {2026-01-23},
journal = {Ardea},
volume = {113},
number = {1},
keywords = {},
pubstate = {published},
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García-Morales, Ricardo; Farach-Espinoza, Edgardo B.; Herrera-Cervantes, Hugo; Nevárez-Martínez, Manuel O.; López-Martínez, Juana
Long-term variability in sea surface temperature and chlorophyll-a concentration in the Pacific region off Baja California Journal Article
In: Marine Environmental Research, vol. 208, pp. 107156, 2025, ISSN: 01411136.
@article{garcia-morales_long-term_2025,
title = {Long-term variability in sea surface temperature and chlorophyll-a concentration in the Pacific region off Baja California},
author = { Ricardo García-Morales and Edgardo B. Farach-Espinoza and Hugo Herrera-Cervantes and Manuel O. Nevárez-Martínez and Juana López-Martínez},
url = {https://linkinghub.elsevier.com/retrieve/pii/S0141113625002132},
doi = {10.1016/j.marenvres.2025.107156},
issn = {01411136},
year = {2025},
date = {2025-06-01},
urldate = {2026-01-23},
journal = {Marine Environmental Research},
volume = {208},
pages = {107156},
keywords = {},
pubstate = {published},
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Ruiz-Mar, María Guadalupe; Pardo, Mario A.; Schramm, Yolanda; Lubinsky-Jinich, Denise; Arias-Del-Razo, Alejandro; Flores-Mejía, Sofía Daniela; Heckel, Gisela
Decrease in Pacific harbor seal counts in the Southern California current large marine ecosystem Journal Article
In: Biodiversity and Conservation, vol. 34, no. 7, pp. 2381–2399, 2025, ISSN: 0960-3115, 1572-9710.
@article{ruiz-mar_decrease_2025,
title = {Decrease in Pacific harbor seal counts in the Southern California current large marine ecosystem},
author = { María Guadalupe Ruiz-Mar and Mario A. Pardo and Yolanda Schramm and Denise Lubinsky-Jinich and Alejandro Arias-Del-Razo and Sofía Daniela Flores-Mejía and Gisela Heckel},
url = {https://link.springer.com/10.1007/s10531-025-03074-1},
doi = {10.1007/s10531-025-03074-1},
issn = {0960-3115, 1572-9710},
year = {2025},
date = {2025-06-01},
urldate = {2026-01-23},
journal = {Biodiversity and Conservation},
volume = {34},
number = {7},
pages = {2381–2399},
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Vega-Camarena, José Pablo; Brito-Castillo, Luis; Farfán, Luis Manuel; Rodríguez-Solís, José Luis; Serrano-Barragán, Jocelyn Betsabé
Analysis of extreme events: Large coverage drought and daily precipitation events in Jalisco, Mexico Journal Article
In: Atmósfera, vol. 39, 2025.
@article{vega-camarena_analysis_2025,
title = {Analysis of extreme events: Large coverage drought and daily precipitation events in Jalisco, Mexico},
author = { José Pablo Vega-Camarena and Luis Brito-Castillo and Luis Manuel Farfán and José Luis Rodríguez-Solís and Jocelyn Betsabé Serrano-Barragán},
url = {https://www.revistascca.unam.mx/atm/index.php/atm/article/view/53429},
doi = {10.20937/ATM.53429},
year = {2025},
date = {2025-05-01},
urldate = {2026-01-23},
journal = {Atmósfera},
volume = {39},
abstract = {The objectives of the present study are to analyze: (1) drought events with large coverage and their possible response to El Niño Southern Oscillation (ENSO) and (2) extreme daily precipitation (EDP) events, both during the 1980-2019 period considering daily precipitation data from climatological stations during the summer months (July-September) in the state of Jalisco, Mexico. For the first objective, a drought analysis was performed using the Standardized Precipitation Index (SPI) at time scales of three (SPI-3) and 12 months (SPI-12), calculating seasonal (July-September) and annual (January-December) series. For the second objective, an EDP event was defined by filtering records greater than 30 mm from the selected stations, then adjusting them to a probability distribution to obtain the 99th percentile (P99) of each series. Values above P99 were identified as EDP events. The results indicate that drought events with large coverage (SPI-12) occurred under La Niña conditions in the 1989-1990 and 2011-2012 periods, affecting 71.4 and 64.3% of the state, respectively, where the coastal region was the least affected. A total of 57 EDP events were identified, but no particular ENSO pattern was determined. The most frequent peak activity occurred in 1987, 1999, 2010, and 2013, representing 31.6%, concentrated in 11 out of 28 climatological stations. While ENSO influences are weaker in these regions, other drivers, such as tropical cyclones, need adaptive disaster preparedness measures. Strengthening early warning systems, improving urban drainage infrastructure, and updating zoning regulations can mitigate flood impacts, reduce economic losses, and protect lives.},
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tppubtype = {article}
}
The objectives of the present study are to analyze: (1) drought events with large coverage and their possible response to El Niño Southern Oscillation (ENSO) and (2) extreme daily precipitation (EDP) events, both during the 1980-2019 period considering daily precipitation data from climatological stations during the summer months (July-September) in the state of Jalisco, Mexico. For the first objective, a drought analysis was performed using the Standardized Precipitation Index (SPI) at time scales of three (SPI-3) and 12 months (SPI-12), calculating seasonal (July-September) and annual (January-December) series. For the second objective, an EDP event was defined by filtering records greater than 30 mm from the selected stations, then adjusting them to a probability distribution to obtain the 99th percentile (P99) of each series. Values above P99 were identified as EDP events. The results indicate that drought events with large coverage (SPI-12) occurred under La Niña conditions in the 1989-1990 and 2011-2012 periods, affecting 71.4 and 64.3% of the state, respectively, where the coastal region was the least affected. A total of 57 EDP events were identified, but no particular ENSO pattern was determined. The most frequent peak activity occurred in 1987, 1999, 2010, and 2013, representing 31.6%, concentrated in 11 out of 28 climatological stations. While ENSO influences are weaker in these regions, other drivers, such as tropical cyclones, need adaptive disaster preparedness measures. Strengthening early warning systems, improving urban drainage infrastructure, and updating zoning regulations can mitigate flood impacts, reduce economic losses, and protect lives.
Ryan, Thomas P.; Palacios, Eduardo; Amador, Edgar; Lopez, Medardo Cruz; Dolinski, Lauren; Fonseca, Juanita; Alvarez, Adriana Hernández; García, Germán N. Leyva; Reyes, Francisco Jaime Martínez; Parra, Brunilda Rebeca Del Carmen Menares; Espinoza, Manuel Muñoz; Serrato, Liliana Ortiz; Cruz, Ángeles Yazmín Sánchez; Pintos, Graciela Tiburcio
The Current Status and Distribution of the Least Tern Breeding in the Gulf of California, México Journal Article
In: Waterbirds, vol. 47, no. 4, 2025, ISSN: 1524-4695.
@article{ryan_current_2025,
title = {The Current Status and Distribution of the Least Tern Breeding in the Gulf of California, México},
author = { Thomas P. Ryan and Eduardo Palacios and Edgar Amador and Medardo Cruz Lopez and Lauren Dolinski and Juanita Fonseca and Adriana Hernández Alvarez and Germán N. Leyva García and Francisco Jaime Martínez Reyes and Brunilda Rebeca Del Carmen Menares Parra and Manuel Muñoz Espinoza and Liliana Ortiz Serrato and Ángeles Yazmín Sánchez Cruz and Graciela Tiburcio Pintos},
url = {https://bioone.org/journals/waterbirds/volume-47/issue-4/063.047.0405/The-Current-Status-and-Distribution-of-the-Least-Tern-Breeding/10.1675/063.047.0405.full},
doi = {10.1675/063.047.0405},
issn = {1524-4695},
year = {2025},
date = {2025-03-01},
urldate = {2026-01-23},
journal = {Waterbirds},
volume = {47},
number = {4},
keywords = {},
pubstate = {published},
tppubtype = {article}
}