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161 resultados encontrados para: AUTOR: Hernández, David
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1.
CD
Resumen en: Español |
Resumen en español

...de tierras abajo vengo, cantan los Huaches, Cochos, Chinos y uno que otro gachupin en jacarandoso fandango. Este disco es el inicio de una serie que busca guardar en cofre digital las joyas que la tradición ha pulido a fuerza de repetir el canto y ejercitar los dedos; pero sobretodo, queremos animar a los guachitos y guachitas a tomar los instrumentos de los abuelos para tocar la vieja y alegre música antes de que desaparezca en el polvo del olvido


2.
Artículo
Resistencia a insecticidas en Aedes aegypti y Aedes albopictus (Diptera: Culicidae) de Tapachula, Chiapas, México
López Solís, Alma Delia (autora) ; Castillo Vera, Alfredo (autor) ; Cisneros Hernández, Juan (autor) ; Solis Santoyo, Francisco (autor) ; Penilla Navarro, Rosa Patricia (autor) ; Black, William C. (autor) ; Torres Estrada, José Luis (autor) ; Rodríguez Ramírez, Américo David (autor) ;
Disponible en línea
Contenido en: Salud Pública de México Volumen 62, número 4 (julio-agosto 2020), p. 439-446 ISSN: 0036-3634
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
59848-10 (Disponible)
Disponibles para prestamo: 1
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Resumen en: Español | Inglés |
Resumen en español

Objetivo. Determinar la resistencia a insecticidas en Ae. aegypti y Ae. albopictus de Tapachula, Chiapas, México. Material y métodos. Se utilizaron ovitrampas para obtener huevos de mosquitos Aedes y se realizaron pruebas de susceptibilidad (CDC) y ensayos enzimáticos con la primera generación. Resultados. Aedes aegypti mostró resistencia a deltametrina, permetrina, malatión, clorpirifos, temefos y a bendiocarb (CARB), mientras que Aedes albopictus a malatión y en menor grado a cloripirifos, temefos, permetrina y deltametrina. Ambas especies mostraron altos niveles de enzimas como citocomo P450 y glutatión S-tranferasa, mientras que los niveles de esterasas variaron por especie y sitio muestreado. Se detectó acetilcolinesterasa insensible a insecticidas en ambas especies. Conclusión. En un hábitat urbano de Tapachula, Chiapas, México donde se aplica control con insecticidas Ae. aegypti y Ae. albopictus sólo son susceptibles al propoxur.

Resumen en inglés

Objective. To determine the insecticide resistance status of Ae. aegypti and Ae. albopictus from Tapachula, México. Materials and methods. Mosquito eggs were collected with the use of ovitraps and CDC susceptibility bioassays and biochemical assays were conducted to determine resistance levels and resistance mechanisms, respectively. Results. Ae. aegypti showed resistance to deltamethrin and permethrin (PYRs), malathion, chlorpyrifos and temephos (OP), and to bendiocarb (CARB), while Ae. albopictus showed resistance to malathion and to a lesser intensity to chlorypirifos, temephos, permethrin and deltamethrin. Both species showed high levels of P450 and GSTs, while levels of esterases varied by species and collection site. Altered acethilcholinesterase was detected in both species. Conclusion. In an urban habitat from Tapachula, Chiapas, Mexico where vector control using insecticides takes place, Ae. aegypti and Ae. albopictus are only susceptible to propoxur.


3.
- Artículo con arbitraje
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Resumen en: Español | Inglés |
Resumen en español

Se realizó un estudio transversal y comparativo de tres sistemas de producción (maíz, flores y hortalizas) en la región de los Altos de Chiapas, México. Los objetivos fueron caracterizar los plaguicidas utilizados, describir los conocimientos y conductas de su manejo, e identificar los síntomas de intoxicación aguda por dichos insumos entre los productores agrícolas. Para recabar la información se aplicaron 523 encuestas dirigidas a los jefes de familia responsables del uso de dichos productos. La baja escolaridad se asoció de manera significativa con los escasos conocimientos sobre su peligrosidad, principalmente entre los productores de hortalizas. En los tres sistemas agrícolas, las conductas de manipulación son inapropiadas, independientemente de la escolaridad de los usuarios. Los floricultores y horticultores están expuestos a insecticidas extremadamente peligrosos (categoría toxicológica CT I) y altamente peligrosos (CT II), así como a fungicidas ligeramente peligrosos (CT IV). Los campesinos dedicados al cultivo de maíz se exponen con frecuencia a herbicidas CT II, III y IV e insecticidas CT I. Se identificó una diversidad de síntomas de intoxicación aguda entre los agricultores, probablemente asociada a la diversidad de plaguicidas utilizados. Es urgente diseñar e implementar estrategias para promover el uso seguro de estos insumos químicos y disminuir los riesgos a la salud en la población usuaria.

Resumen en inglés

A transversal and comparative study was conducted in three production systems (corn, flowers and vegetables) in the Highlands of Chiapas, Mexico. The objectives were to characterize the pesticides used, describe the knowledge and behavior of their management, as well as to identify the symptoms of acute intoxication by these inputs among agricultural producers. To collect the information, 523 surveys were applied to heads of families responsible for the use of said products. Low educational level was associated significantly with little knowledge about its dangerousness, mainly among vegetable producers. In the three agricultural systems, the handling behavior is inappropriate regardless of the schooling of the users. Growers and horticulturists are mainly exposed to extremely hazardous insecticides (toxicological category TC I) and highly dangerous (TC II), as well slightly dangerous fungicides (TC IV). Peasants engaged in the cultivation of corn are frequently exposed to herbicides TC II, III and IV, and insecticides TC I. A variety of symptoms of acute poisoning among farmers was identified, probably associated with the diversity of pesticides used. It is urgent to design and implement strategies to promote safe use of chemical inputs and reduce the risks to health of the user population.


4.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Global distribution of earthworm diversity
Phillips, Helen R. P. (autora) ; Guerra, Carlos A. (autor) ; Bartz, Marie L. C. (coaut.) ; Briones, Maria J. I. (autora) ; Brown, George (autor) ; Crowther, Thomas W. (autor) ; Ferlian, Olga (autora) ; Gongalsky, Konstantin B. (autor) ; van den Hoogen, Johan (autor) ; Krebs, Julia (autora) ; Orgiazzi, Alberto (autor) ; Routh, Devin (autor) ; Schwarz, Benjamin (autor) ; Bach, Elizabeth M. (autora) ; Bennett, Joanne (coaut.) ; Brose, Ulrich (coaut.) ; Decaëns, Thibaud (coaut.) ; König Ries, Birgitta (coaut.) ; Loreau, Michel (autor) ; Mathieu, Jérôme (coaut.) ; Mulder, Christian (coaut.) ; van der Putten, Wim H. (coaut.) ; Ramirez, Kelly S. (coaut.) ; Rillig, Matthias C. (autor) ; Russell, David (autor) ; Rutgers, Michiel (autor) ; Thakur, Madhav P. (coaut.) ; de Vries, Franciska T. (autora) ; Wall, Diana H. (autora) ; Wardle, David A. (autor) ; Arai, Miwa (coaut.) ; Ayuke, Fredrick O. (autor) ; Baker, Geoff H. (coaut.) ; Beauséjour, Robin (autor) ; Bedano, José C. (autor) ; Birkhofer, Klaus (coaut.) ; Blanchart, Eric (autor) ; Blossey, Bernd (autor) ; Bolger, Thomas (autor) ; Bradley, Robert L. (autor) ; Callaham, Mac A. (coaut.) ; Capowiez, Yvan (coaut.) ; Caulfield, Mark E. (coaut.) ; Choi, Amy (coaut.) ; Crotty, Felicity V. (coaut.) ; Dávalos, Andrea (coaut.) ; Díaz Cosin, Darío J. (autor) ; Domínguez, Anahí (autora) ; Duhour, Andrés Esteban (autor) ; van Eekeren, Nick (coaut.) ; Emmerling, Christoph (coaut.) ; Falco, Liliana B. (autora) ; Fernández, Rosa (autora) ; Fonte, Steven J. (coaut.) ; Fragoso González, Carlos Enrique (autor) ; Franco, André L. C. (coaut.) ; Fugère, Martine (coaut.) ; Fusilero, Abegail T. (coaut.) ; Gholami, Shaieste (coaut.) ; Gundale, Michael J. (autor) ; Gutiérrez López, Mónica (autora) ; Hackenberger, Davorka K. (coaut.) ; Hernández, Luis M. (autor) ; Hishi, Takuo (coaut.) ; Holdsworth, Andrew R. (coaut.) ; Holmstrup, Martin (autor) ; Hopfensperger, Kristine (autora) ; Huerta Lwanga, Esperanza (autora) ; Huhta, Veikko (coaut.) ; Hurisso, Tunsisa T. (coaut.) ; Iannone III, Basil V. (coaut.) ; Iordache, Madalina (autora) ; Joschko, Monika (autora) ; Kaneko, Nobuhiro (coaut.) ; Kanianska, Radoslava (coaut.) ; Keith, Aidan M. (coaut.) ; Kelly, Courtland A. (coaut.) ; Kernecker, Maria L. (coaut.) ; Klaminder, Jonatan (autor) ; Koné, Armand W. (autor) ; Kooch, Yahya (coaut.) ; Kukkonen, Sanna T. (coaut.) ; Lalthanzara, H. (coaut.) ; Lammel, Daniel R. (autor) ; Lebedev, Iurii M. (coaut.) ; Li, Yiqing (coaut.) ; Lidon, Juan B. Jesús (autor) ; Lincoln, Noa K. (coaut.) ; Loss, Scott R. (coaut.) ; Marichal, Raphael (autor) ; Matula, Radim (coaut.) ; Moos, Jan Hendrik (autor) ; Moreno, Gerardo (autor) ; Morón Ríos, Alejandro (autor) (1960-) ; Muys, Bart (coaut.) ; Neirynck, Johan (autor) ; Norgrove, Lindsey (coaut.) ; Novo, Marta (autora) ; Nuutinen, Visa (coaut.) ; Nuzzo, Victoria (autora) ; Mujeeb Rahman P. (coaut.) ; Pansu, Johan (autor) ; Paudel, Shishi (coaut.) ; Pérès, Guénola (coaut.) ; Pérez Camacho, Lorenzo (autor) ; Piñeiro, Raúl (autor) ; Ponge, Jean François (autor) ; Rashid, Muhammad Imtiaz (coaut.) ; Rebollo, Salvador (autor) ; Rodeiro Iglesias, Javier (autor) ; Rodríguez, Miguel Ángel (autor) ; Roth, Alexander M. (autor) ; Rousseau, Guillaume X. (coaut.) ; Rozen, Anna (autora) ; Sayad, Ehsa (autora) ; van Schaik, Loes (coaut.) ; Scharenbroch, Bryant C. (coaut.) ; Schirrmann, Michael (autor) ; Schmid, Olaf (coaut.) ; Schröder, Boris (coaut.) ; Seeber, Julia (autora) ; Shashkov, Maxim P. (coaut.) ; Singh, Jaswinder (coaut.) ; Smith, Sandy M. (coaut.) ; Steinwandter, Michael (autor) ; Talavera, José A. (autor) ; Trigo, Dolores (autora) ; Tsukamoto, Jiro (coaut.) ; de Valença, Anne W. (coaut.) ; Vanek, Steven J. (coaut.) ; Virto, Iñigo (autor) ; Wackett, Adrian A. (autor) ; Warren, Matthew W. (coaut.) ; Wehr, Nathaniel H. (coaut.) ; Whalen, Joann K. (coaut.) ; Wironen, Michael B. (coaut.) ; Wolters, Volkmar (coaut.) ; Zenkova, Irina V. (autora) ; Zhang, Weixin (coaut.) ; Cameron, Erin K. (autor) ; Eisenhauer, Nico (autor) ;
Disponible en línea
Contenido en: Science Vol. 366, no. 6464 (October 2019), p. 480–485 ISSN: 1095-9203
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Soil organisms, including earthworms, are a key component of terrestrial ecosystems. However, little is known about their diversity, their distribution, and the threats affecting them. We compiled a global dataset of sampled earthworm communities from 6928 sites in 57 countries as a basis for predicting patterns in earthworm diversity, abundance, and biomass. We found that local species richness and abundance typically peaked at higher latitudes, displaying patterns opposite to those observed in aboveground organisms. However, high species dissimilarity across tropical locations may cause diversity across the entirety of the tropics to be higher than elsewhere. Climate variables were found to be more important in shaping earthworm communities than soil properties or habitat cover. These findings suggest that climate change may have serious implications for earthworm communities and for the functions they provide.


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Resumen en: Inglés |
Resumen en inglés

Background: We assessed metrics of the metazoan parasite infracommunities of the dusky founder (Syacium papillosum) as indicators of aquatic environmental health of the Yucatan Shelf (YS) prior to oil extraction. We sampled the dusky founder and its parasites along the YS, mostly during the 2015 north wind season (November–April). Our aims were: (i) to determine whether the parasite infracommunity metrics of S. papillosum exhibit signifcant diferences among YS subregions; (ii) to determine whether the probability of the occurrence of its parasite species and individu‑ als were afected by environmental variables, nutrients, heavy metals and hydrocarbons at the seascape level; and (iii) to determine whether there were statistical diferences between the parasite infracommunity metrics of S. papillosum from YS and those of Syacium gunteri from the Campeche Sound. Multivariate statistical analyses and generalised additive models (GAMs) were used to examine the potential statistical associations between the contaminants, environmental variables and parasite community metrics, and the maximum entropy algorithm (MaxEnt) was used to characterise the habitat’s suitability for the parasite’s probability of occurrence. Results: We recovered 48 metazoan parasite species from 127 S. papillosum, with larval cestodes and digeneans being the most numerically-dominant. Multivariate analyses showed signifcant diferences in parasite infracommu‑ nity metrics among Western YS, Mid YS and Caribbean subregions, with the latter being the richest in species but not in individuals. The GAM and MaxEnt results indicated a negative efect of top predators (e.g. sharks and rays) removal on parasite metrics. The parasite infracommunities of S. papillosum were twice as rich in the number of species and individuals as those reported for S. gunteri from the Campeche Sound.

Conclusions: The significant differences among subregions in parasite metrics were apparently due to the interruption of the Yucatan current during the north wind season. The fishing of top predators in combination with an influx of nutrients and hydrocarbons in low concentrations coincides with an increase in larval cestodes and digeneans in S. papillosum. The dusky founder inhabits a region (YS) with a larger number of metazoan parasite species compared with those available for S. gunteri in the Campeche Sound, suggesting better environmental conditions for transmis‑ sion in the YS.


6.
- Artículo con arbitraje
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Parasitic nematodes in Snappers (Perciformes: Lutjanidae) from the Southern Gulf of Mexico and Mexican Caribbean
Hernández Olascoaga, Arturo (autor) ; González Solís, David (autor) ;
Contenido en: Journal of Parasitology Volumen 105, número 5 (October 2019), páginas 697-703 ISSN: 0022-3395
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Snappers from the southern Gulf of Mexico (SGM) and Mexican Caribbean (CAR) were examined for parasitic nematodes to determine their richness, composition, and infection parameters (prevalence and mean intensity). From February 2016 to March 2018, 431 individuals of 8 snapper species were collected in 6 localities. In all, these fishes were parasitized by 2,275 individual nematodes belonging to 13 taxa: Terranova sp. was found in 7 of 8 host species and showed the highest prevalence (23%), while the rest had lower values (<10%). Lutjanus griseus (Linnaeus) harbored the highest species richness (10 species), followed by Lutjanus apodus (Walbaum) (8 species). Most localities were similar in terms of species richness but differed in the specific composition. Eight nematode taxa represent new host records for the family Lutjanidae (Gill), thus increasing to 22 the nematode taxa in the SGM and CAR. There is a potential risk to public health due to the presence of nematodes with zoonotic potential (as Anisakis sp.) and the habit in the region of eating raw fish (cebiche).


7.
- Capítulo de libro sin arbitraje
Sobreexplotación de la biodiversidad
Vargas Simón, Georgina (autora) ; Zamora Cornelio, Luis Felipe (autor) ; Morales García, Beatriz (autora) ; Díaz Jiménez, Pedro (autor) ; Tovilla Hernández, Cristian (autor) ; Zenteno Ruíz, Claudia Elena (autora) ; Olivera Gómez, León David (autor) ;
Contenido en: La biodiversidad en Tabasco. Estudio de estado / coordinación y seguimiento general: Andrea Cruz Angón, Jorge Cruz Medina, Jessica Valero Padilla, Flor Paulina Rodríguez Reynaga, Erika Daniela Melgarejo Distrito Federal, México : Comisión Nacional para el Conocimiento y Uso de la Biodiversidad, 2019 Vol. III, páginas 135-142 ISBN:978-6078570225 (Vol. III)
Bibliotecas: Villahermosa
Cerrar
SIBE Villahermosa
37051-10 (Disponible)
Disponibles para prestamo: 1

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Resumen en: Español | Inglés |
Resumen en español

El tapir de Baird es el más grande de las especies de tapires Neotropicales y está considerado como en peligro por la UICN. La Reserva de la Biosfera de Calakmul (CBR por sus siglas en ingles) es el área de bosque tropical protegido mas grande de México y se encuentra en el corazón de la Selva Maya, un bosque tri-nacional localizado entre Belice, Guatemala y México considerado el bosque tropical mas extenso de Mesoamérica. El agua de lluvia en la CBR percola al subsuelo y solamente en pocos sitios (localmente conocidos como aguadas) se almacena agua en el suelo. Estos sitios son raros en el paisaje con una densidad de uno cada 10 km2 y una distancia promedio de 3 km entre aguadas. Solamente algunos de esos sitios conserva agua durante la época seca de cada año. Se detectó una reducción de la disponibilidad de agua desde el 2008 al 2018. Documentamos la población de tapires durante estos años y examinamos la relación con este patrón de reducción de la disponibilidad de agua. Usando la técnica de foto-trampeo monitoreamos entre 9 a 15 aguadas en 8 años dentro de este periodo de 11 años. Con un total de mas de 18,000 días-cámaras encontramos que aunque la población de tapires de la CBR permanece estable en promedio el índice de abundancia relativa detectó una ligera disminución en la abundancia y en algunas aguadas se asoció con la falta de agua. Estudios de largo plazo de especies en peligro asociadas a cuerpos de agua son importantes porque permiten estimar los efectos de la disponibilidad de agua y predecir futuros escenarios para las poblaciones de fauna silvestre. Esta información es esencial para elaborar planes de conservación de especies en peligro y sensibles tales como el Tapir de Baird.

Resumen en inglés

Baird’s tapir is the largest Neotropical tapir species, and it is considered Endangered by the IUCN. The Calakmul Biosphere Reserve (CBR) is the largest protected tropical forest in Mexico. The CBR is at the heart of the Maya Forest, a tri-national forest located in Mexico, Guatemala, and Belize that is the largest tropical forest outside the Amazon River basin. Free-standing water in the CBR occurs in only a few ephemeral ponds. These ponds are rare in the landscape, with a mean density of one pond in every 10 km2, and with an average distance among ponds of 3 km. Only some of these ponds have free-standing water in every year. A decreasing trend in water availability from these ponds was detected from 2008 to 2018. Our present objective was to document population of the tapirs during these 11 years, and reveal any relationship to the pattern of water availability. Using the technique of photo-trapping, we monitored from 9 to 15 ponds over a period of 8 years (a total of more than 18,000 camera-days) during the 11-year period. Results showed that although the population remained relatively stable, the index of relative abundance indicated a slight decrease in population abundance and in some sites seemed at least superficially associated with decreasing water availability. Such long-term population studies are becoming more important for estimating the impacts of possible changes and for predicting the future of populations. In turn, they assist the conservation of endangered and sensitive species such as Baird’s tapir.


10.
- Artículo con arbitraje
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Resumen en: Inglés |
Resumen en inglés

Systematic reviews and meta-analytical approach are a tool used in different social and biological disciplines, but its application in evaluating ethnobiological information is scarce. Thus, through this analytical approach, we seek to answer if there are any patterns in the mexican ethnozoological scientific production. We searched for studies published between 2005 and 2015 in catalogues, repositories and databases. For evaluating significative differences among seven variable datasets, we first used non parametric Kruskal-Wallis tests and then Tukey multiple comparison tests. We also determined the link between researchers and institutions with a multidimensional non-metric scaling analysis. We found 295 published studies, book chapters were the most representative (27%), diffusion articles (20%), impact factor articles (15%) and indexed articles (14%). There are significant differences in the number of publications among the evaluated years, among thematic areas, study focus (qualitative/quantitative), ethnographic and biological methods. Regarding academic linking, we identified 94 author adscription institutions, however, no research networks were identified. Our results suggest that the amount, diffusion and reach of mexican ethnozoological production show a tendency to non-periodic publishing, predilection for qualitative approach, a low use of statistical and ethnobiological analysis, as well as an inadequate selection of biological methods. We suggest this data analysis approach will allow a better standardization for information taking and processing, aiding the discipline in its growth and consolidation.