El Colegio de la Frontera Sur

Se caracterizó la composición química y la fermentación ruminal de tres desechos generados tras la cosecha de larvas de mosca de la fruta provenientes de dos plantas de producción de Anastrepha ludens y Ceratitis capitata. El T1 correspondió a la dieta de A. ludens, mientras que T2 (Celulosa) y T3 (Triturado) provinieron de dietas de C. capitata. Los resultados se evaluaron utilizando el procedimiento GLM. La proteína cruda fue mayor en T1 y T2 que en T3 (8.89%) (p < 0.05). La degradación de materia seca fue similar entre T1 y T2 (45.61% y 45.98%) y superior a T3 (p < 0.05). En la cinética, el volumen máximo de gas fue mayor en T1 (331.73 ml g⁻¹ MS). Estos materiales aportan la proteína mínima requerida para satisfacer requerimientos de los microbios ruminales y su inclusión en dietas para rumiantes podría favorecer el aprovechamiento de residuos fomentando la economía circular.

El estudio examina el desarrollo profesional docente en el contexto de la transformación digital, articulando los constructos de Competencias TIC, Gestión Tecnológica y Hábitat Digital. El objetivo principal fue testar un modelo teórico explicativo, mediante Modelos de Ecuaciones Estructurales (SEM), que hipotetiza al Hábitat Digital como un factor mediador en la relación entre la Gestión Tecnológica (institucional) y las Competencias TIC (individual). Se empleó un enfoque cuantitativo, aplicando un cuestionario (validado mediante AFE/AFC) a una muestra de 534 docentes. Los resultados descriptivos revelan un déficit significativo en la autopercepción docente, con niveles sistemáticamente bajos en los tres constructos, siendo el Hábitat Digital (colaboración y redes) el área más deficiente. El SEM confirmó el modelo de mediación, demostrando que la Gestión Tecnológica es el predictor principal con mayor poder explicativo. Se concluye que las intervenciones centradas exclusivamente en la capacitación de competencias individuales son insuficientes. Para un desarrollo profesional efectivo, las políticas educativas deben priorizar el fortalecimiento de la Gestión Tecnológica institucional, condición necesaria para construir un Hábitat Digital funcional.

Fungal communities exhibit strong spatial and environmental structuring across forest ecosystems, yet the drivers shaping their diversity patterns remain incompletely understood. In this study, we combined multivariate ordination, clustering analyses, and Zeta diversity (ζ-diversity) metrics to characterize fungal assemblages across environmental gradients. Canonical Correspondence Analysis (CCA) revealed that fungal community composition was significantly associated with climatic variables, particularly seasonal precipitation, thermal variation, and elevation. Hierarchical and K-means clustering identified coherent community clusters that differed in species richness and alpha diversity. Bray–Curtis distances and a Ward-based dendrogram further supported this separation, revealing a clear hierarchical structure in community similarity. Zeta diversity analysis indicated a slower species turnover, suggesting niche assimilation and habitat homogenization. Furthermore, the grouping of fungal assemblages followed a power-law model, emphasizing the role of deterministic environmental filtering. Critically, our findings reveal that only 1208 (33.5%) of the 3606 recorded species are present within existing Protected Natural Areas (PNAs), indicating a significant conservation gap. Together, these results provide an integrated ecological understanding of fungal diversity patterns, highlighting how climate–topography interactions structure communities and emphasizing the urgent need to align conservation strategies with these environmental drivers.

El presente artículo tiene como objetivo analizar las estrategias y prácticas comunitarias de negociación y compra de tierras en el núcleo comunal chatino de Santiago Cuixtla, Oaxaca, expresiones que adoptan una forma política de lucha por el territorio para mantener la posesión de tierras comunales y enfrentar el despojo del territorio indígena. La investigación emplea la categoría de espacio social como eje analítico, siguiendo los planteamientos de Lefebvre y Santos, para examinar cómo la propiedad del suelo constituye una relación social que es simultáneamente presente, pasado y futuro. La metodología combina entrevistas cualitativas a autoridades agrarias y comunales con revisión documental de archivos históricos, incluyendo el Registro Agrario Nacional y el Archivo General de la Nación. Los hallazgos revelan que, en la década de 1950, los chatinos emprendieron la compra colectiva de tierras al latifundio Casa Valle como estrategia para restituir parte de su territorio despojado desde la época colonial. Este proceso implicó acuerdos de asamblea comunitaria y la incorporación gradual de mestizos y afromexicanos como comuneros para fortalecer la defensa territorial. Se documenta también el conflicto de límites con San Pedro Mixtepec, derivado de omisiones en la resolución presidencial de 1972, que persiste hasta la actualidad. Se concluye que los conflictos territoriales en territorios indígenas tienen profundas raíces históricas de despojos y desplazamiento, y que los pueblos desarrollan estrategias de mediano y largo plazo que combinan la lucha jurídica, la organización comunitaria y la compra de tierras para preservar su territorio.

In recent years, different spectral indices have been adapted or proposed for burn area (BA) extraction from satellite imagery. Many such indices have been particularly designed for specific satellite sensors, which could limit their applicability to other platforms. This research aims to explore the performance of spectral indices for burn area detection and post-fire recovery evaluation tasks in forest ecosystems. For this purpose, nine vegetation and burn area indices, commonly used in the current literature, were chosen to perform different experiments using Sentinel-2 images collected from three study areas characterised by large fire events. A separability analysis using the Spectral Discrimination index (SDI) led us to determine that A New Burned Area Index (ABAI), the Normalised Burn Radio Plus (NBR+), and the Normalised Burn Radio (NBR) indices were capable of discriminating burn areas when clouds and shadows were present in the imagery. Moreover, a short-term time series analysis allowed the identification of particular spectral index methods that could be useful for post-fire recovery evaluation in forest ecosystems.

Parasites are part of ecosystems and can regulate populations. The diseases they cause may negatively impact wildlife, sometimes linked to the imbalance created by anthropogenic environmental changes. Mexico harbors more than 10% of the world's avifauna, but there have been few studies on gastrointestinal (GIT) parasites in wild birds of Mexico. The aim of this review was to provide a comprehensive summary of knowledge on GIT parasites of Mexican wild birds and offer suggestions for approaches for future parasitological research on birds in Mexico. We analyzed 85 documents reporting gastrointestinal parasites in wild birds in Mexico. Overall, 73 genera and 96 bird species were reported as hosts for gastrointestinal parasites, representing approximately 8.17% of the bird species richness in Mexico, with the Anseriformes and Pelecaniformes being the most studied hosts. A total of 187 gastrointestinal parasite species have been identified to species level; the least studied phyla are Metamonada and Apicomplexa. Gastrointestinal parasites have been detected in 30 states; the central region of Mexico has been best studied. Game and aquatic species have been the most studied hosts, with few parasitological studies on nonaquatic bird species. Further studies are needed to understand the host-parasite relationships in Mexican landbirds, the diversity of parasites, the ecological factors underlying parasitism, and the impact of parasites in Mexican wild birds under anthropogenic changes.

As a pluricultural country, Mexico must promote breastfeeding through intercultural approaches. Although existing research remains limited, the exclusion and precarious living conditions experienced by many Indigenous communities render such efforts both challenging and essential for reducing inequalities in breastfeeding support. Moreover, while low breastfeeding rates at both global and local levels have been extensively documented through quantitative studies, the lived experiences of Indigenous mothers remain highly variable and underexplored. To date, qualitative research centered on Indigenous breastfeeding mothers' perspectives is scarce. This paper presents a case study of breastfeeding practices within a Tzeltal Indigenous community, examining the embodied, co-participatory, and situated dimensions of maternal care. Using qualitative methods and Interpretative Phenomenological Analysis within the 'Operational Research Group and Participatory Inquiry´ framework. A total of 19 Tzeltal-speaking mothers who were breastfeeding their children participated in the study, conducted on November 12, 2024, in the Tzeltal community of San Juan Cancuc, Chiapas. Data were collected through group sessions documented with field notes and audio recordings. The material was analyzed using conventional content analysis with emergent coding, grounding interpretations in participants' lived, embodied, affective, communal, and contextual breastfeeding experiences, allowing categories to be inductively generated from participants' narratives. The findings highlight that breastfeeding practices within a Tzeltal Indigenous community are not merely an individual act but a deeply relational, embodied and communitarian experience shaped by sociocultural, cosmogonic and spatial-contextual factors. This qualitative study, grounded in an intercultural perspective and centered on Indigenous mothers' breastfeeding experiences, advocates for a more nuanced, interculturally oriented approach to breastfeeding promotion, protection, and support -one that recognizes the affective, embodied, and collective dimensions of maternal care. By attending to local beliefs, cosmogonies, and shared practices surrounding traditional breastfeeding, the study offers crucial insights that contribute to advancing reproductive justice for women, infants, and their communities, while underscoring the importance of intercultural strategies in the design and implementation of breastfeeding policies in a pluricultural country such as Mexico.