ABSTRACT Perennial ryegrass is one of the most important food sources in animal production. However, several pests affect this crop, and one of the primary control strategies is the symbiotic relationships between ryegrass endophyte fungi. This fungus produces alkaloids that exhibit toxic activity against arthropods. Furthermore, the effect of fungi may extend to higher trophic levels, including predators (spiders and/or insects), decreasing their abundance and diversity. Given the importance of spiders and insects as predators, whether the symbiotic interaction between perennial ryegrass and endophyte fungus reduces the abundance and diversity of predators pose an important question. To address this question, natural enemies in perennial ryegrass were collected and analyzed over a year, and the percentage of endophyte fungus was evaluated by the presence of hyphae from two ryegrass cultivars, Jumbo (E-) and Alto AR1 (E+). We observed an 80% endophyte infection rate for (E+) and 0% for (E-). Moreover, 222 individual spiders corresponding to 10 families were identified in both perennial ryegrasses, including 209 individuals for (E-) and 13 for (E+). The most abundant spider family was Lycosidae, representing 71.17% of the total spiders. In addition, 65 insects were collected, corresponding to 6 families, with Carabidae being the most abundant. Furthermore, the Simpson index indicated the dominance of the family Lycosidae. Overall, spider and insect abundance and diversity were reduced in (E+), suggesting a negative effect of the endophyte on predator populations.

ABSTRACT The objective of this work was to assess the performance of two aeration types, splash and blower, used on a commercial biofloc technology (BFT) farm of red tilapia, Oreochromis sp., and their effect on growth performance and water quality parameters. For this, red tilapia juveniles were randomly distributed into twelve tanks. Each tank had an independent aeration system, and two experimental groups were characterized: six tanks used splash aerators (SPL group; one per tank, 1 hp), and the remaining tanks used a blower aerator (BLW group) with the same potency (1 hp). Water quality parameters were registered daily, and after 90 days of commercial culture, we obtained final growth parameters for each batch (tank). We observed no statistical differences on growth parameters, while water quality parameters showed that dissolved oxygen and oxygen saturation were significantly higher for the SPL group. Therefore, this field study corroborated indications from prior research at laboratory conditions that, at a commercial scale, splash aerators are more adequate for the production of red tilapia in BFT conditions.

Resumen: En noviembre de 2021 se informó sobre una nueva variante de preocupación (VoC) de SARS-CoV-2, la llamada variante Ómicron (B.1.1.529), que llamó la atención de los expertos por su elevado número de mutaciones en la proteína S. Presentamos a un paciente masculino de 51 años proveniente de Sudáfrica que comienza con síntomas respiratorios a las 48 horas de su llegada a la Ciudad de México. Durante su estancia en urgencias se obtuvo prueba de antígeno y RT-qPCR para SARS-CoV-2 positivas, con mínima alteración de parámetros de laboratorio y sin evidencia de afección pulmonar por tomografía. El paciente presentó evolución favorable y fue dado de alta seis días después. El día 29 de noviembre se recibió la notificación del Instituto de Diagnóstico y Referencia Epidemiológicos (InDRE) de que se trataba de la variante Ómicron del virus SARS-CoV-2.

Abstract: On November 2021 a new SARS-CoV-2 variant of concern (VoC), named Omicron (B.1.1.529) was reported. This variant draw attention for its high number of mutations on the S protein. We present a 51 year old male, from South Africa who started with respiratory symptoms 48 hours after his arrival to Mexico City. During his stay at the ER a positive antigen and positive RT-qPCR were obtained. Minimal laboratory alterations were observed with no evidence of lung involvement on the CT scan. The outcome was favorable and was discharged six days later. On November 29, a notification from InDRE was received, reporting that the sequence obtained was compatible with SARS-CoV-2 Omicron variant.

Abstract Feeding accounts for 50%-60% of production costs in fish farming, and alternative raw materials are used to lower production costs. These raw materials can alter nutritional values and sensory aspects of the final product. The present study describes the results for the proximal composition, sensory, and microbiological analyses of red tilapia (Oreochromis sp.) fed with a biofloc meal (fish sediment residue). The results showed that the red tilapia biofloc meal contained protein levels over 30%, with 3% nitrogen and 6% calcium. Fish fed biofloc meal showed productive performances within the ranges established for the species. Sensory analysis revealed that the cooked product’s appearance was very characteristic, presenting a slight metallic flavor and moderate juiciness. The bromatological composition analysis indicated that each 100g of tilapia contained 16 g of protein. Finally, the microbiological study guarantees compliance with the local tandards and confirms that the product does not contain significant levels of microorganisms that could cause foodborne diseases when consumed by humans. In conclusion, the use of biofloc meal at a small red tilapia farm proved to be a sustainable alternative for feeding Oreochromis sp.

ABSTRACT Round pneumonia is an unusual radiological manifestation of a bacterial lung infection. We present the case of an elderly male patient who arrived at the emergency room with a productive cough and exertional dyspnea. His chest x-ray and CT showed a round opacity and air bronchograms in the right upper lobe. Taken together, the patient’s symptoms and images strongly suggest a pulmonary infection. Empirical antibiotic therapy with ceftriaxone and clarithromycin was started. The sputum culture was positive for Enterobacter hormaechei and the bacterium was sensitive to levofloxacin; therefore, the antibiotic therapy was changed. Despite the treatment, the patient progressed to respiratory failure and septic shock, dying six days after admission. Although round pneumonia is uncommon, it is a potentially curable disease and clinicians should always consider it in their differential diagnosis.

Resumen Presentar una serie de casos de COVID-19 con requerimiento de ingreso a Unidad de Cuidados Intensivos. La información fue tomada de las historias clínicas, y su evaluación y diagnóstico fue realizado mediante estudios paraclínicos en sangre, orina, PCR e imágenes diagnósticas en 4 pacientes con diferentes comorbilidades y nexo epidemiológico presente para desarrollo de la enfermedad. Los cuatro casos fueron manejados con cloroquina 300 mg vía oral, cada 12 horas, y azitromicina 1 gr vía oral, cada 24 horas, durante 5 días, sin complicaciones ni toxicidad asociada. El caso 1 desarrolló falla orgánica múltiple, incluyendo injuria renal aguda con una estancia en UCI de 4 días antes de su fallecimiento, mientras los casos 2, 3 y 4 tuvieron una evolución favorable y fueron dados de alta de UCI. Se requieren estudios multicéntricos rápidos que orienten científicamente hacia un mejor abordaje diagnóstico y manejo, en el contexto de una enfermedad con un comportamiento clínico-epidemiológico que debe estudiarse en profundidad y que probablemente cobrará muchas vidas; además, debido a la ausencia de pruebas diagnósticas rápidas, la utilización de una clasificación basada en la severidad de lesiones radiológicas llamada CO-RADS (Covid-19 Imaging Reporting and Data System) podría ser de gran importancia para instalar de manera temprana los tratamientos farmacológicos disponibles y la asistencia respiratoria mecánica precoz.

Abstract To present a COVID-19 case series with clinical admission criteria to Intensive Care Unit. Patients information was obtained from medical records, and daily clinical evaluation whereas diagnosis was carried out through paraclinical studies in blood, urine, PCR and diagnostic images in 4 patients with different comorbidities and epidemiological link for the development of COVID-19. All four cases were managed with chloroquine 300 mg orally every 12 hours and azithromycin orally every 24 hours for 5 days without complications or associated toxicity. The case 1 developed multiple organ failure, including acute kidney injury with an ICU stay of 4 days before his death, while cases 2, 3 and 4 had a favorable evolution and were discharged from the ICU. Rapid multicenter studies are required to scientifically guide a better diagnostic and management approach, in the context of a disease with a clinical-epidemiological behavior that must be studied in depth and will probably take many lives. In addition, due to the absence of sufficiently rapid tests, the use of a classification based on the severity of radiological lesions called CO-RADS (Covid-19 Imaging Reporting and Data System) could be of great importance to install available pharmacological treatments early and early mechanical respiratory support.

Abstract Flavonoid biosynthesis may be affected by plant domestication, with flavonoid production being reduced in proportion to the degree of domestication. In this context, kaempferol (3,4´,5,7-tetrahydroxyflavone) has been identified in the leaves of wild and cultivated Ugni molinae, a berry endemic to Chile. The biosynthetic pathway of kaempferol production begins with naringenin (4´,5,7-trihydroxyflavanone), which is converted to dihydrokaempferol (3,4´,5,7-tetrahydroxyflavanone), catalyzed by flavanone 3ß-hydroxylase (FHT) and then converted to kaempferol by a bifunctional enzyme called flavonol synthase (FLS). Therefore, our study aims to evaluate how FLS activity is affected in murtilla plants that are subjected to the domestication process. Kaempferol was quantified from methanolic extracts of leaf samples collected from both cultivated and wild U. molinae plants using high-performance liquid chromatography, and enzyme extraction was performed to determine FLS activity. The results showed that kaempferol concentration in wild plants from the Soloyo (0.14 μg g-1), Mehuín (0.18 μg g-1) and Queule (0.25 μg g-1) sampling areas was higher than in their cultivated counterparts. Our data are consistent with the FLS activity detected in samples obtained from Manzanal Alto (134.79 pKatal, Soloyo (96.48 pKatal), and Mehuín (119.97 pKatal). These samples also exhibited higher enzymatic activity than their cultivated counterparts. Together, these data suggest that FLS activity is negatively affected by the domestication process.

Resumen La biosíntesis de flavonoides puede verse afectada por la domesticación vegetal, reduciéndose la producción en relación al grado de domesticación. En este contexto, ha sido identificado el kaempferol (3,4´, 5,7-tetrahidroxiflavona) en hojas de Ugni molinae silvestre y cultivada. La ruta biosintética del kaempferol comienza con naringenina (4´, 5,7-trihidroxiflavanona), que se convierte en dihidrokaempferol (3,4´, 5,7-tetrahidroxiflavanona), catalizada por la flavanona ٣ß-hidroxilasa (FHT). Finalmente, se convierte en kaempferol por una enzima bifuncional llamada flavonol sintasa (FLS). Por lo tanto, nuestro estudio tiene como objetivo evaluar cómo se ve afectada la actividad de FLS en plantas de murtilla que están sujetas a un proceso de domesticación. El kaempferol fue cuantificado a partir de los extractos metanólicos de hojas recogidas en plantas cultivadas y silvestres de U. molinae mediante cromatografía líquida de alta resolución. Además, se realizó una extracción de enzimas para determinar la actividad de FLS. Los resultados mostraron que la concentración de kaempferol en las áreas de muestreo silvestre de Soloyo (0.14 μg g-1), Mehuín (0.18 μg g-1) y Queule (0.25 μg g-1) fue mayor que en sus contrapartes cultivadas. Estos datos fueron consistentes con la actividad de FLS determinada en muestras obtenidas de Manzanal Alto (134,79 pKatal), Soloyo (96,48 pKatal) y Mehuín (119,97 pKatal). Estos también exhibieron una mayor actividad enzimática que sus contrapartes cultivadas. Por lo tanto, nuestros datos sugieren que la actividad de FLS se ve reducida por la domesticación vegetal.

Introduction: Tuberculosis is the seventh leading cause of death. Spinal involvement represents <1% of cases. The objective was to investigate the frequency of Pott´s disease in our province, to typify its profile and to identify guidelines for similar regions. Methods: Identification of all tuberculosis admissions from 1996 to 2014 in the main referral hospitals of our province. Medical records review of all cases with spinal involvement. Frankel and GATA classifications. Data from last national census. Literature review. Results: Fourteen cases: 8 males/6 females. Average age: 35.4 years (range 3.8-63). Follow-up: 2.8 years (range 1 month- 15 years); one immediate postoperative death. Seven patients came from low tuberculosis burden Departments. Initial symptoms: neurological impairment (9 cases), pure axial and/or radicular pain (4 cases) and pure spine deformity (1 patient). Initial Frankel: E, 5 cases; D, 2; C, 2; and A, 5 patients. Localization: thoracic, 5; thoraco-lumbar, 6; lumbar, 1; multiple 2 patients. Ethnic distribution: 5 caucasians, 5 natives, 3 creoles, 1 mestizo. According to GATA classification: 1 type IB lesion; 4 type II; 8 type III; one unclassifiable case. Native patients had more severe neurological and GATA lesions. Twelve patients were operated on; 5 had residual deformities without differences among double instrumentation, isolated posterior instrumentation and no instrumentation. At follow-up: 8 asymptomatic cases, 4 deceased and 2 patients with moderate symptoms. No neurological worsening was observed; only 5 patients improved. Conclusions: Severe forms, and advanced and common surgical presentations are more frequent in native patients. Mortality is high.

Introducción: La tuberculosis es la séptima causa de muerte mundial. Menos del 1% de los pacientes tiene compromiso raquídeo. El objetivo del estudio fue investigar la frecuencia del mal de Pott en la provincia e identificar pautas para regiones similares. Materiales y Métodos: Rastreo de pacientes internados por tuberculosis entre 1996 y 2014, en Hospitales provinciales de cabecera. Revisión de historias de casos raquídeos. Clasificaciones de Frankel y del GATA. Datos de censos nacionales. Revisión bibliográfica. Resultados: Catorce casos: 8 varones/6 mujeres. Edad promedio: 35.4 años (rango 3.8-63). Seguimiento: 2.8 años (1 mes-15 años); un óbito posoperatorio inmediato. Siete pacientes provenían de Departamentos con baja carga de morbilidad de tuberculosis. Síntomas iniciales: déficit neurológico (9 casos), dolor axial o radicular puro (4 casos) y deformidad vertebral pura (1 caso). Frankel al ingreso: E (5 casos), D (2), C (2) y A (5). Localizaciones: torácica, 5; toracolumbar, 6; lumbar, 1; múltiple 2 pacientes. Distribución étnica: 5 caucásicos, 5 aborígenes, 3 criollos, 1 mestizo. Según la Clasificación del GATA: 1 lesión de tipo IB; 4 de tipo II; 8 de tipo III; 1 caso inclasificable. Los pacientes de etnia originaria tuvieron cuadros neurológicos y lesiones GATA más graves. Doce fueron operados; 5 presentaron deformidad secuelar, sin diferencias entre doble instrumentación, instrumentación posterior aislada o sin instrumentación. Al seguimiento: 8 pacientes asintomáticos, 4 fallecidos y 2 con síntomas moderados; no hubo deterioros neurológicos y solo 5 mejorías. Conclusiones: En pacientes de etnia originaria son más frecuentes las formas graves, las presentaciones avanzadas y de tratamiento quirúrgico habitual. La mortalidad es alta.

In the last decade, there has been increasing interest in investigating the impact of flavonoids on insects, specifically for pest control. In this study, we investigated the impact of isoflavonoids upon the feeding behavior of the clover root borer, Hylastinus obscurus Marsham (Coleoptera: Curculionidae), which is one of the most serious global pests associated with red clover, Trifolium pratense L. Four aglycones isoflavonoids: genistein (1), formononetin (2), daidzein (3) and biochanin A (4) were isolated and identified by HPLC, from roots of two Chilean red clover cultivars. The first two compounds, formononetin (2) and genistein (), showed high feeding deterrent activity when they were evaluated in artificial diets. This antifeedant effect of isoflavones on feeding behavior of H. obscurus suggests that they are responsible for a decreasedin insect weight gain as compared with the control. This information could be useful respectively, to farmers and researcher to produce and create plants resistant to curculionid.

The Argentine stem weevil, Listronotus bonariensis, is an important pest in pastures, especially ryegrass (Lolium sp.), compromising grassland persistence and productivity. Both, adult and specially larvae cause severe damage, action that generate the death of the tiller and reducing forage production. Chemical control has limited effectiveness in adult’s insect and negative effects on the environmental and toxicity to pollinators when applied close to the flowering period is observed. Therefore, the main currently strategy is based on the use of cultivars of Lolium endophyte fungus-infected with Neothypodium genus. However, over a decade that there are no reports on the presence of this weevil in southern Chile. Hence, the aim of this research was report the actual incidence of L. bonariensis in ryegrass pastures. The results of two years of prospecting showed that this weevil is currently causing damage to the ryegrass pastures indicating that the effectiveness of species infected with the fungus must be evaluated.

ABSTRACT Previous researches have established that the swim speed of some microcrustaceans is influenced by chemical compounds emitted by conspecifics. We examined the hypothesis that cuticular compounds present on the body surface of A. franciscana, the most widespread member of Artemia genus, play a role in the swim speed of conspecific males. The movements (swim) of one male confronted to a sponge soaked with female or male cuticular extract, were recorded during 30 minutes and the swim speed was determined using a behavioral tracking software (Ethovision 3.1, Noldus Technologies). As a control, the movements of one male confronted to a sponge soaked with salty water or with a mixture of the solvents used in the extraction (chloroform-methanol), was recorded. The results showed that cuticular compounds from either female or male increase 1.5 (ca.) times the swim speed of males in comparison with the controls treatments salty water and the solvents. There was no a significant difference between the controls (salty water and chloroform-methanol). Chemical characterization was developed by sterification of the cuticular extracts and analyses by GC-FID and GC-MS. Four saturated fatty acid (myristic acid, palmitic acid, estearic acid, arachidic acid) and five insaturated fatty acids (oleic acid, linoleic acid, linoleic acid 3n3, cis-11-eicosanoic acid, euric acid) were identified. Myristic acid was found in female cuticular extract, but not in male cuticular extract. Results suggest that chemical compounds present in the cuticular surface of A. franciscana females could have an important role in the intra-specific recognition in this specie.

RESUMEN Investigaciones anteriores han establecido que la velocidad de nado de algunos microcrustáceos se encuentra influenciada por compuestos químicos emitidos por conespecíficos. Nosotros examinamos la hipótesis de que los compuestos cuticulares presentes sobre la superficie corporal de A. franciscana, el miembro con mayor distribución mundial del genero Artemia, juega un rol en la velocidad de nado de machos conespecíficos. Los movimientos nado de un macho confrontado a una esponja empapada con extracto cuticular de una hembra o de un macho, fueron grabados durante 30 minutos y la velocidad de nado fue determinada usando un software de rastreo conductual (Ethovision 3.1, Noldus Technologies). Como control, fueron grabados los movimientos de un macho confrontado a una esponja empapada con agua de mar artificial o con una mezcla de los solventes usados en la extracción (cloroformo-metanol). Los resultados mostraron que los compuestos cuticulares tanto de hembras como de machos incrementan 1,5 veces (aproximadamente) la velocidad de nado de los machos, en comparación con los experimentos control donde se uso agua de mar artificial y los solventes de la extracción. No hubo diferencias significativas entre los controles (agua de mar artificial y cloroformo-metanol). La caracterización química fue desarrollada mediante esterificación de los extractos cuticulares y analizados por CG-DIL y CG-EM. Cuatro ácidos grasos saturados (ácido mirístico, ácido palmítico, ácido esteárico, ácido araquídico) y cinco ácidos grasos insaturados (ácido oleico, ácido linoleico, ácido linoleico 3n3, ácido cis-11-eicosanoico, ácido eurico) fueron identificados. El ácido mirístico fue encontrado en los extractos cuticulares de hembras pero no en los extractos cuticulares de machos. Los resultados sugieren que los compuestos químicos presentes en la superficie cuticular de las hembras de A. franciscana podrían tener un importante rol en el reconocimiento intraespecífico de la especie.

Plant domestication is a process in which plants’ chemical defenses that help them cope with herbivores might decline. Consequences of this process could be reflected in an increase in insect pests. Therefore, we carried out a survey to contrast the diversity, damage indexes and insect assemblages between cultivated and wild "Murtilla" (Ugni molinae) plants. The main scientific question put forward in this paper is as follows: Is there a decrease in diversity and an increase in both insect assemblages and damage indexes associated with the domestication process in U. molinae plants? The objective of this report was to compare the structure of a taxonomic assemblage collected in both wild and cultivated plants and their temporal variation over the year. Seven ecotypes and their respective wild populations were selected for these studies. The results showed higher insect assemblages in wild parents (77.35%) vs. cultivated (22.7%). The damage indexes were also higher in wild plants (0.23). The diversity indexes according to Margalef (12.98), the Shannon index (5.15) and the Simpson index (19.04) were higher in wild plants. Moreover, approximately 60 species were determínate. We detected changes in insect assemblages, damage and diversity indexes that could suggest that murtilla domestication has altered insect assemblages.

M. Chacón-Fuentes, M. Lizama, L. Parra, I Seguel y A. Quiroz. 2016. Diversidad, composición de la comunidad de insectos e índice de daño, en murtillas silvestres y cultivadas. Cien. Inv. Agr. 43(1):57-67. La domesticación vegetal es un proceso en el cual las plantas pueden disminuir su nivel de defensas químicas para combatir herbívoros. Algunas de las posibles consecuencias podrían reflejarse en un incremento en el número y en la diversidad de insectos. Por lo tanto, se realizó un "survey" para comparar el índice de daño y la diversidad de insectos en plantas cultivadas y silvestres de murtilla (Ugni molinae). La principal interrogante de este trabajo fue: ¿La domesticación en plantas de murtilla, disminuirá la diversidad e incrementará el índice de daño y la comunidad de insectos? El objetivo de esta investigación fue comparar la población de insectos asociada a plantas silvestres y cultivadas además de analizar su variación durante el año. Siete ecotipos y sus correspondientes contrapartes silvestres fueron seleccionadas para este estudio. Los resultados mostraron un mayor número de insectos en plantas silvestres (77,35%) vs. (22,7%) cultivadas. El índice de daño fue mayor en plantas silvestres (0,23) comparada con plantas cultivadas. El índice de Margalef mostró la mayor riqueza de insectos en plantas cultivadas. Sin embargo, el índice de Shannon fue mayor (5.15) en plantas silvestres. Además, cerca de 60 especies de insectos fueron determinadas. Se detectaron cambios en la comunidad de insectos, índices de daño y diversidad que podrían sugerir que la domesticación en murtilla ha alterado la comunidad de insectos.

Objectives To determine concentrations of PM10, mercury and lead in indoor air of homes, water sources and soil in municipalities near mining operations. Method 6 points were evaluated in areas of influence and 2 in control areas. For measurements of indoor air, we used the NIOSH 600 method (PM10), NIOSH 6009 (mercury) and NIOSH 7300 (lead). For water analysis we used the IDEAM Guide for monitoring discharges. For soil analysis, we used the cold vapor technique (mercury) and atomic absorption (lead). Results In almost all selected households, the average PM10 and mercury concentrations in indoor air exceeded applicable air quality standards. Concentrations of lead were below standard levels. In all water sources, high concentrations of lead were found and in some places within the mining areas, high levels of iron, aluminum and mercury were also found. In soil, mercury concentrations were below the detection level and for lead, differences between the monitored points were observed. Conclusions The results do not establish causal relationships between mining and concentration of these pollutants in the evaluated areas because of the multiplicity of sources in the area. However, such studies provide important information, useful to agents of the environmental health system and researchers. Installation of networks for environmental monitoring to obtain continuous reports is suggested.

Objetivos Determinar concentraciones de PM10, mercurio y plomo en aire intramural de viviendas, en fuentes de agua y suelo de municipios aledaños a actividad minera. Método Se evaluaron 6 puntos en áreas de influencia y 2 en áreas control. Para las mediciones de aire intramural, se utilizaron los métodos NIOSH 600 (PM10), NIOSH 6009 (mercurio) y NIOSH 7300 (plomo). Para análisis de aguas se utilizó la Guía de monitoreo de vertimientos del IDEAM y, para análisis de suelos se utilizó la técnica de vapor frío (mercurio) y absorción atómica (plomo). Resultados En casi todas las viviendas seleccionadas, las concentraciones promedio de PM10 y mercurio en aire intramural superaron las normas aplicables de seguridad del aire, mientras que las concentraciones de plomo estuvieron por debajo. En todos los cuerpos de agua se encontraron concentraciones elevadas de plomo y en algunos puntos en las zonas mineras se encontraron niveles altos de hierro, mercurio y aluminio. En el monitoreo de suelos, las concentraciones de mercurio están por debajo del nivel de detección y, para plomo se observaron diferencias entre los puntos monitoreados. Conclusiones Se encontró concentración de varios contaminantes por encima de los valores aceptables. En las zonas evaluadas hay numerosas y diversas fuentes de contaminación de tal manera que no es posible individualizar las relaciones entre actividad minera y contaminación. Sin embargo, este tipo de estudios de corte aportan información puntual, útil para los agentes del sistema de salud ambiental e investigadores. Se sugiere instalar redes de monitoreo ambiental que permitan un seguimiento continuo.

Objetivos Determinar concentraciones de PM10, mercurio y plomo en aire intramural de viviendas, en fuentes de agua y suelo de municipios aledaños a actividad minera. Método Se evaluaron 6 puntos en áreas de influencia y 2 en áreas control. Para las mediciones de aire intramural, se utilizaron los métodos NIOSH 600 (PM10), NIOSH 6009 (mercurio) y NIOSH 7300 (plomo). Para análisis de aguas se utilizó la Guía de monitoreo de vertimientos del IDEAM y, para análisis de suelos se utilizó la técnica de vapor frío (mercurio) y absorción atómica (plomo). Resultados En casi todas las viviendas seleccionadas, las concentraciones promedio de PM10 y mercurio en aire intramural superaron las normas aplicables de seguridad del aire, mientras que las concentraciones de plomo estuvieron por debajo. En todos los cuerpos de agua se encontraron concentraciones elevadas de plomo y en algunos puntos en las zonas mineras se encontraron niveles altos de hierro, mercurio y aluminio. En el monitoreo de suelos, las concentraciones de mercurio están por debajo del nivel de detección y, para plomo se observaron diferencias entre los puntos monitoreados. Conclusiones Se encontró concentración de varios contaminantes por encima de los valores aceptables. En las zonas evaluadas hay numerosas y diversas fuentes de contaminación de tal manera que no es posible individualizar las relaciones entre actividad minera y contaminación. Sin embargo, este tipo de estudios de corte aportan información puntual, útil para los agentes del sistema de salud ambiental e investigadores. Se sugiere instalar redes de monitoreo ambiental que permitan un seguimiento continuo.

Objectives To determine concentrations of PM10, mercury and lead in indoor air of homes, water sources and soil in municipalities near mining operations. Method 6 points were evaluated in areas of influence and 2 in control areas. For measurements of indoor air, we used the NIOSH 600 method (PM10), NIOSH 6009 (mercury) and NIOSH 7300 (lead). For water analysis we used the IDEAM Guide for monitoring discharges. For soil analysis, we used the cold vapor technique (mercury) and atomic absorption (lead). Results In almost all selected households, the average PM10 and mercury concentrations in indoor air exceeded applicable air quality standards. Concentrations of lead were below standard levels. In all water sources, high concentrations of lead were found and in some places within the mining areas, high levels of iron, aluminum and mercury were also found. In soil, mercury concentrations were below the detection level and for lead, differences between the monitored points were observed. Conclusions The results do not establish causal relationships between mining and concentration of these pollutants in the evaluated areas because of the multiplicity of sources in the area. However, such studies provide important information, useful to agents of the environmental health system and researchers. Installation of networks for environmental monitoring to obtain continuous reports is suggested.

Two behavioral experiments were performed to test that A. franciscana shows specific courtship patterns, which in part, would be governed by semiochemicals released by females. The courtship ethogram, based on 30 adult virgin pairs (1 female v/s 1 male) individually video recorded for 1 hour, revealed that males display four independent activity patterns: 1) approach and touch, 2) swim behind, 3) riding attempt, and 4) riding success. The analysis of the transitions among the observed patterns suggested two ways to achieve riding success, both requiring female touch. In one, males approach and touch females followed by riding attempt (27% probability of occurrence), but if the latter fails, males start over from approach and touch (23% probability of occurrence) to finally achieve riding success (19% probability of occurrence). The alternative route is approach and touch, swimming behind (7% probability of occurrence) and riding success (5% probability of occurrence). The role of semiochemicals released from females was assessed by using the polar solution (PS) extracted from water conditioned with 40 adult virgin females. Virgin males were soaked with PS for obtaining pseudo females. Afterwards, we confronted 1 pseudo female, 1 female, or 1 control male to either 1 male or 5 male. In all cases the behavior was recorded for 1 hour (N=10), and the frequencies of occurrence of each courtship patterns were analyzed. The most important results showed that: 1) virgin female and pseudo female elicited the same frequency of response in 1 male in all four courtship patterns (P˃0.05); b) virgin female and pseudo female elicited the same response when tested against 5 males in approach and touch, swim behind and riding attempt (P˃0.05). The fact that in all the cases control male always elicited the lowest frequency value in each courtship patterns, strongly suggests the possible role of sexual semiochemicals in the courtship behavior of A. franciscana. The combination of behavior and chemical cues suggests an elaborate pre-mating recognition.

Se realizaron dos experimentos conductuales para evaluar que A. franciscana muestra patrones de cortejo específicos, que en parte, serían gobernados por semioquímicos liberados por hembras. El etograma del cortejo, construido a partir de la grabación individual de 30 parejas adultas vírgenes (1 hembra v/s 1 macho) durante 1 hora, reveló que los machos mostraron cuatro patrones de actividad independientes: 1) acercamiento y toque, 2) nado en retroceso, 3) intento de monta, y 4) éxito de monta. El análisis de las transiciones entre los patrones observados sugirió dos maneras de conseguir una monta exitosa, en ambas el patrón acercamiento y toque fue fundamental. La primera transición consistió en que una vez que los machos se acercan y tocan a las hembras, intentan montar a las hembras (27% de probabilidad de ocurrencia), pero si esto no ocurre los machos comienzan nuevamente a acercarse y tocar a las hembra (23% de probabilidad de ocurrencia) para finalmente lograr una monta exitosa (19% de probabilidad de ocurrencia). La ruta alternativa es mediante la aproximación y toque para luego desarrollar el nado en retroceso (7% de probabilidad de ocurrencia) y montaje exitoso (5% de probabilidad de ocurrencia). El rol de los semioquímicos liberados por hembras fue evaluado mediante el uso de la solución polar (SP) obtenida desde agua acondicionada con 40 hembras vírgenes. Machos vírgenes fueron empapados con SP para obtener pseudo hembras. Luego, se enfrentaron 1 pseudo hembra, 1 hembra, 1 macho control a ya sea 1 o 5 machos. En todos los casos, la conducta fue registrada durante 1 hora (n=10), y se analizaron las frecuencia de ocurrencia de cada uno de los patrones de cortejo. Los resultados más importantes mostraron que: 1) la hembra virgen y pseudo hembra elicitó la misma frecuencia de respuesta en 1 macho en los cuatro patrones de cortejo (P˃0,05); b) hembras vírgenes y pseudo hembras obtuvieron la misma respuesta cuando se evaluaron contra 5 machos en acercamiento y toque, nado en retroceso e intento de monta (P˃0,05). El hecho que en todo los casos el macho control siempre elicitó el menor valor de frecuencia en cada patrón de cortejo sugiere el posible rol de semioquímicos sexuales en la conducta de cortejo de A. franciscana. La combinación de señales químicas y conductuales sugieren un elaborado reconocimiento de pre-cortejo.