Repositorio Nacional

This work reports the follow up of rainfall water quality at Atlixco, Puebla during the 2018 season. The main objective of this work was to evaluate how height and pollutants define the quality of water precipitated. Samples were collected at the roof of a house in Atlixco center, and others at the roof of a convent located at the San Miguel Hill, this represents a 44 m difference in height. Chemical composition was analyzed for 19 physicochemical parameters using gravimetric and spectrophotometric techniques. Obtained results were compared with drinking water standards finding that Pb and Cd contents are exceeded. Also, it was found a strong contribution of terrestrial sources since the marine rates are above unit, as well as excess concentrations whose values go from negative to positive. Finally, Pearson correlation was obtained finding that most of chemical parameters correlations are in disagreement for both sites, fact which confirms that ionic content is strongly influenced by anthropogenic sources.

rainfall ionic content marine rates excess concentrations Lluvia contenido iónico cociente marino concentración en exceso Estudios urbanos CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA

Monitoreo de playas prioritarias

NORMA RAMIREZ SALINAS JUAN LEODEGARIO GARCIA ROJAS (2012, [Documento de trabajo])

Se presentan los resultados obtenidos en la prueba, para Enterococos en agua de mar, llevada a cabo en 37 playas de Campeche, Chiapas, Guerrero, Jalisco, Nayarit y Veracruz.

Control de calidad del agua Análisis bacteriológico Agua de mar Campeche Chiapas Guerrero Jalisco Nayarit Veracruz INGENIERÍA Y TECNOLOGÍA

Presencia de Perkinsus marinus en el ambiente y en los moluscos Anadara tuberculosa, Mytella strigata y Crassostrea corteziensis de la costa de Nayarit

Presence of Perkinsus marinus in the environment and in the mollusks Anadara tuberculosa, Mytella strigata and Crassostrea corteziensis from the coast of Nayarit

Naoki Abraham Kawamoto Camacho (2023, [Tesis de maestría])

El parásito Perkinsus marinus cuyo ciclo de vida le permite subsistir en el ambiente y cumplir su ciclo dentro del hospedero es el agente causal de la perkinsosis, letal para Crasssotrea virginica y enlistado por la Organización Mundial de Salud Animal (OMSA). El comercio de ostiones entre el Golfo de México y el Pacífico mexicano ha generado preocupaciones sanitarias al introducir estos moluscos en comunidades costeras del Pacífico. P. marinus formaría parte de la microbiota ambiental y estar en los moluscos bivalvos de estos ambientes. En el presente estudio se emplearon las técnicas PCR, qPCR, secuenciación de amplicones y de próxima generación, así como análisis de microbioma para determinar la presencia de P. marinus en el ambiente y en los moluscos Anadara tuberculosa, Mytella strigata y Crassostrea corteziensis que coexisten en el estero Pozo Chino, Nayarit. Además, se analizaron muestras embebidas en parafina de Tabasco, Veracruz (C. virginica), Nayarit y Sinaloa (C. corteziensis) para realizar comparaciones genotípicas. La prevalencia de infección mediante PCR fue de 86% en ostiones de la zona baja y media del estero, y de 66% en la zona alta, mientras que para M. strigata fue de 2.2% por qPCR. No se detectó a P. marinus en el ambiente ni en A. tuberculosa. La identidad del parásito fue de 86.1 al 100% mediante secuenciación dirigida. Los primers que amplifican productos de 130 pb fueron más eficaces. La no detección del parásito en el entorno se debe a su baja presencia, consecuencia de la baja salinidad, ausencia de infecciones graves y la falta de eventos inusuales de mortalidad, evitando la liberación masiva del parásito en el ambiente. Además, la baja detección en M. strigata y ausencia en A. tuberculosa puede relacionarse con su susceptibilidad. El análisis del microbioma eucariótico mostró a P. marinus como parte de la microbiota en C. corteziensis. En el ambiente los grupos más abundantes fueron copépodos, moluscos, poliquetos y diatomeas. Se requiere profundizar en su estudio en el ambiente y hospederos a lo largo del año para dimensionar mejor el riesgo sanitario que se enfrenta en una zona donde se ha establecido el parásito.

The parasite Perkinsus marinus, whose life cycle allows it to survive in the environment and complete its cycle within the host, is the causative agent of perkinsosis, lethal to Crassostrea virginica, and listed by the World Organisation for Animal Health (WOAH). The trade of oysters between the Gulf of Mexico and the Mexican Pacific coast has raised sanitary concerns by introducing these mollusks into coastal communities on the Pacific. In areas where detection has occurred, P. marinus would be part of the environmental microbiota (plankton/sediments) and in coexisting bivalve mollusks. In this study, PCR, Real-Time PCR (qPCR), amplicon sequencing and next-generation sequencing techniques, as well as microbiome analysis, were employed to determine the presence of P. marinus in the environment (plankton and sediments) and in the mollusks Anadara tuberculosa, Mytella strigata, and Crassostrea corteziensis coexisting in the Pozo Chino estuary, Nayarit. Paraffin-embedded samples from Tabasco, Veracruz (C. virginica), Nayarit, and Sinaloa (C. corteziensis) were also analyzed for genotypic comparisons. The infection prevalence through PCR was 86% in oysters from the lower and middle zones of the estuary and 66% in the upper zone, while for M. strigata, it was 2.2% by RT-PCR. P. marinus was not detected in the environment or in A. tuberculosa. Directed sequencing revealed a parasite identity of 86.1 to 100%. Primers amplifying 130 bp products were more effective. The lack of detection of the parasite in the environment is due to its low presence, resulting from low salinity, the absence of records of severe infections, and the lack of unusual mortality events, preventing massive release of the parasite into the environment. Additionally, the isolated detection in M. strigata and absence in A. tuberculosa may be related to their susceptibility. Analysis of eukaryotic microbiomes identified P. marinus as part of the microbiota in C. corteziensis. In the environment, the most abundant groups were copepods, mollusks, polychaetes, and diatoms. Further studies in the environment and hosts throughout the year are required to better understand the health risks in an area where the parasite has become established.

Perkinsus marinus, Anadara tuberculosa, Mytella strigata, Crassostrea, protista, Pozo Chino, susceptibilidad Perkinsus marinus, Anadara tuberculosa, Mytella strigata, Crassostrea, protist, Pozo Chino, susceptibility CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA CIENCIAS DE LA TIERRA Y DEL ESPACIO OCEANOGRAFÍA OCEANOGRAFÍA ACUICULTURA MARINA OCEANOGRAFÍA ACUICULTURA MARINA

The public-private confluence of interests between urban and real estate marketing. The case of the Mitikah Ciudad Viva project

ANA PAULA MONTES RUIZ (2021, [Artículo, Artículo])

The shift from a managerial to an entrepreneurial approach establishes a new form of urban governance based on a broader coalition of forces in which public-private partnerships have taken place. The Xoco-Mitikah urban conflict shows that the confluence of interests between the real estate and urban tourism industry embraces the common goal of designing an urban experience that makes the competitive advantages of Southern Mexico City profitable for both. Mitikah’s real estate marketing analysis showed that, through the promotion highlights of the South, the conflictive socio-territorial relationships that emerge along with the construction of real estate megaprojects are emotionally and affectively mediated.

urban conflict real estate marketing social media urban tourism conflicto urbano marketing inmobiliario redes sociales turismo urbano HUMANIDADES Y CIENCIAS DE LA CONDUCTA HUMANIDADES Y CIENCIAS DE LA CONDUCTA

Local markets and food security. The case of the Milpera and Puuc regions in Yucatan

Ana Laura Bojórquez Carrillo Monserrat Vargas Jiménez Mireya Noemi Hernández Islas (2023, [Artículo, Artículo])

Food insecurity is a complex problem worldwide. A major part of this problem is the food supply. Local markets can represent a strategy for building social capital, as well as strategies for subsistence and sustainability of food value chains, contributing to food security and its effects. The objective of this research is to determine if the existence of a municipal market in the Milpera and Puuc regions of Yucatán favors the existence of food security, the consumption or the expense of natural foods. The population is located in 18 municipalities of Yucatán, Mexico. To carry out this study, a cross-sectional, non-experimental study, with a quantitative approach and correlational scope. The main techniques that were applied were descriptive statistics and contingency tables with respect to 6 hypotheses. This work shows that the existence of markets in the communities makes a significant difference because it positively impacts the food security of the inhabitants, since it allows them to have access to a wider variety of products and at the same time, favors the active dynamics of the economy of the community.

Local markets Food safety Local development Food sovereignty Rural areas Mercados locales Seguridad alimentaria Desarrollo local Soberanía alimentaria Zonas rurales CIENCIAS SOCIALES CIENCIAS SOCIALES

Multimodal deep learning methods enhance genomic prediction of wheat breeding

Carolina Rivera-Amado Francisco Pinto Francisco Javier Pinera-Chavez David González-Diéguez Matthew Paul Reynolds Paulino Pérez-Rodríguez Huihui Li Osval Antonio Montesinos-Lopez Jose Crossa (2023, [Artículo])

Conventional Methods Genomic Prediction Accuracy Deep Learning Novel Methods CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA WHEAT BREEDING MACHINE LEARNING METHODS MARKER-ASSISTED SELECTION

Breeding schemes for the implementation of genomic selection in wheat (Triticum spp.)

Filippo Maria Bassi Alison Bentley Rodomiro Ortiz Jose Crossa (2016, [Artículo])

Marker-Aided Breeding CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA BREEDING VALUE GENETIC GAIN GENOTYPE ENVIRONMENT INTERACTION QUANTITATIVE TRAIT LOCI