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541 resultados encontrados para: AUTOR: Pérez Pérez, José
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1.
Libro
Cultivo de maíz y frijol de temporal / José Manuel Pérez Chávez
Pérez Chávez, José Manuel (autor) ; Pérez Chávez, José Manuel (autor) ;
Chihuahua, Chihuahua, México : Universidad Autónoma de Chihuhaua. Facultad de Zooctenia , s.f.
Clasificación: F/630.715 / M3/1
Bibliotecas: Tapachula
Cerrar
SIBE Tapachula
ECO020008604 (Disponible)
Disponibles para prestamo: 1

2.
Libro
Investigación para el desarrollo regional sur: Chiapas, Guerrero y Oaxaca
Toledo Flores, Javier (editor) ;
Distrito Federal, México : Consejo Nacional de Ciencia y Tecnología :: Sistema de Investigación Benito Juárez , s.f.
Clasificación: CH/307.12097275 / I5
Bibliotecas: San Cristóbal , Tapachula
Cerrar
SIBE San Cristóbal
ECO010012034 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Tapachula
ECO020012039 (Disponible) , ECO020012038 (Disponible)
Disponibles para prestamo: 2

3.
Artículo
Biological attributes of diapausing and non-diapausing Doryctobracon areolatus (Hymenoptera, Braconidae), a parasitoid of Anastrepha spp. (Diptera, Tephritidae) fruit flies
Cruz Bustos, Jassmin (autora) ; Montoya, Pablo (autor) ; Pérez Lachaud, Gabriela (autora) ; Valle Mora, Javier Francisco (autor) ; Liedo Fernández, Pablo (autor) ;
Disponible en línea
Contenido en: Journal of Hymenoptera Research Número 78 (August 2020), páginas 41-56 ISSN: 1070-9428
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Resumen en: Inglés |
Resumen en inglés

Doryctobracon areolatus (Szépligeti), a solitary endoparasitoid native to the Neotropics, attacks eggs and early instar larvae of Anastrepha fruit flies, and can enter diapause under tropical and subtropical conditions. We aimed to test if biological attributes, such as size, flight ability, starvation resistance, longevity and fecundity of diapausing individuals differ from those of non-diapausing ones. Parasitoids were obtained from a laboratory colony reared on Anastrepha ludens (Loew) larvae. Parasitized host puparia were sorted in two cohorts according to their diapause condition. Developmental time from egg to adult ranged from 18 to 31 days in non-diapausing parasitoids, and 70 to 278 days for diapausing individuals. Pupal weight and adult measurements were higher in non-diapausing than in diapausing parasitoids. There were no differences in adult longevity, starvation resistance, and emergence between diapausing and non-diapausing wasps. Flight ability and fecundity rates were greater in the non-diapausing than in the diapause cohort. The proportion of female offspring was greater in the non-diapausing cohort (42.5%), whereas in the diapausing cohort the male offspring proportion was greater (62.4%). Both cohorts produced diapause offspring, but the non-diapausing cohort produced more (26.6%) than the diapausing one (9.1%). Maternal age had a significant effect on the proportion of diapause offspring: in 26 to 34 days old non-diapausing females, 78.9% of their offspring entered into diapause. These results confirmed that diapause affects the biological attributes of D. areolatus. The observed differences contribute to better understand the diapause influence on the colonization and rearing process of this species and its use as biocontrol agent.


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Resumen en: Español | Inglés |
Resumen en español

El objetivo del estudio fue determinar el valor nutritivo, la fermentación ruminal y la producción de metano in vitro del follaje de especies arbóreas y arbustivas con potencial forrajero como estrategias de alimentación en época de secas y mitigación de las emisiones de metano. El líquido ruminal fue extraído por medio de una sonda esofágica. Se utilizó un diseño en bloques repetidos en el tiempo. El contenido de proteína cruda (PC) y fibra detergente neutro y acida fluctuaron de 6.14% a 21.78%, 44.34% a 77.43% y 16.12% a 49.53% de materia seca (MS). No se encontró diferencia en el volumen máximo de gas (p > 0.05). La degradabilidad fue diferente, observando la mejor en Tithonia diversifolia (760.40 g/kg de MS), Morus alba (800.66 g/kg de MS) y Hibiscus rosa-sinensis (800.16 g/kg de MS), mientras que la más baja fue Megatryrsus maximus (390.40 g/kg de MS y 287.40 g/kg de materia orgánica (MO)) (p < 0.05). No se observó diferencia en la producción de metano (CH4) (p > 0.05). Se concluye que L. leucocephala, P. piscipula, B. alicastrum y G. ulmifolia, T. diversifolia y M. alba tienen un alto potencial para ser incluidos en la dieta de rumiantes como fuentes de proteína en época de secas y estrategias para mitigar las emisiones de metano.

Resumen en inglés

The objective of the study was to determine the nutritional value, ruminal fermentation, and in vitro methane production of foliage of tree and shrubs species with forage potential as feeding strategies in dry season and mitigation of methane emissions. The rumen liquor was taken by an esophageal tube. A repeated block design overtime was used. The content of crude protein (CP) and neutral and acid detergent fiber ranged from 6.14% to 21.78%, 44.34% to 77.43% and 16.12% to 49.53% of dry matter (DM). No difference was found in the maximum volume of gas (p > 0.05). The degradability was different among species, and it was higher for Tithonia diversifolia (760.40 g/kg DM), Morus alba (800.66 g/kg DM) and Hibuscus rosa-sinensis (800.16 g/kg DM), whilst the lower was for Megathyrsus maximus (390.40 g/kg DM and 287.40 g/kg organic matter (OM)) (p < 0.05). No difference in methane (CH4) production was observed (p > 0.05). It is concluded that L. leucocephala, P. piscipula, B. alicastrum and G. ulmifolia, T. diversifolia, and M. alba have a high potential to be included in the ruminant diet as sources of protein in the dry season and strategies to mitigate methane emissions


5.
Artículo
PDF PDF
Resumen en: Español | Inglés |
Resumen en español

Las características de los humedales costeros son resultado de las interacciones hidrogeomorfológicas entre el continente y el océano, que causan un gradiente ambiental, que resulta en diferentes tipos de vegetación como manglares, popales, tulares, selvas y palmares inundables. Objetivo: Caracterizar las variables del hidroperiodo y fisicoquímicas del agua y suelo para determinar la relación que existe en el patrón de distribución de la vegetación en el Sistema de Humedales El Castaño (SHC). Metodología: Se establecieron 11 unidades de muestreo (UM) permanentes por estrato definidos: cinco en el manglar, dos en selvas inundables, dos en tular y dos en pastizal inundable. De mayo 2016 a octubre 2017 se caracterizó la vegetación y se muestreó mensualmente los niveles de inundación y parámetros fisicoquímicos del agua (superficial, intersticial y subterránea): salinidad, conductividad y pH; y el suelo: densidad aparente, porcentaje de humedad y potencial redox. Resultados: El manglar es el más cercano al mar, tiene la menor diversidad (H:1.66) y especies registradas (14), está dominado por Laguncularia racemosa y Rhizophora mangle y tiene los valores más altos de salinidad intersticial y subterránea, mayores a 10.8 ups, se mantiene inundado de 4 a 12 meses, su potencial redox es de 14.57 mV. Seguido está el manglar, tierra adentro, se ubican los remanentes de la selva inundable, (H:2.18 y 18 especies), dominada por Pachira aquatica, la salinidad intersticial y subterránea de 4.95 ups, permanece inundada de 0 a 6 meses y el potencial redox es de 119.07 mV. El tular, después de la selva, (H:1.92 y 16 especies), dominado por Typha domingensis, salinidad intersticial y subterránea de 6.1 ups, el tiempo de inundación es de 5 a 8 meses y potencial redox es de 125.9 mV.

El pastizal inundable, con menor influencia marina, es un humedal herbáceo modificado para uso ganadero, presentó los valores más altos de diversidad (H:3.44 y 50 especies), Paspalum conjugatum es la especie dominante, la salinidad intersticial y subterránea es menor a 0.5 ups, se mantiene inundado de 5 a 9 meses y el potencial redox es de 151.23 mV. Conclusiones: En cada tipo de vegetación, la estructura, composición y diversidad es diferente, con un alto recambio de especies que indica un gradiente definido por la salinidad.

Resumen en inglés

Distribution patterns and vegetation structure in the coastal wetland gradient in the Castaño, Chiapas, Mexico. Introduction: The characteristics of coastal wetlands are the result of hydrogeomorphological interactions between the continent and the ocean, which cause an environmental gradient, hat results in different vegetation types such as mangroves, freshwater marshes, swamp forests and palm swamps. Objective: To characterize the hydroperiod and physicochemical variables of water and soil and their effect on the distribution of vegetation in the Sistema de Humedales El Castaño. Methods: A total of 11 permanent sampling units (UM) were established by defined strata: five in the mangrove, two in swamp forest, two in freshwater marshes and two in the flooded pasture. From May 2016 to October 2017 the vegetation was characterized and the water levels and physicochemical parameters (superficial, interstitial and groundwater) were sampled monthly for: salinity, and pH; and the soil for: bulk density, humidity percentage, and redox potential.

Results: Mangroves are the closest to the sea, have the lowest diversity (H: 1.66) and species richness (14), they are dominated by Laguncularia racemosa and Rhizophora mangle, have the highest values of interstitial and groundwater salinity, (> 10.8 ups), remain flooded for 4 to 12 months per year, and have a redox potential of 14.57 mV. Immediately, inland, there are remnants of the swamp forests (H: 2.18 and 18 species), dominated by Pachira aquatica , with 5 ups interstitial and groundwater salinity, flooded from 0 to 6 months per year, with a redox potential of 119.07 mV. These forests are followed inland by freshwater marshes (H: 1.92 and 16 species), dominated by Typha domingensis with 6.1 ups interstitial and groundwater salinity, flooded for 5 to 8 months per year and a redox potential of 125.9 mV. Finally, furthest inland is the flooded pasture, a modified herbaceous wetland for cattle grazing (H: 3.44 and 50 species) dominated by Paspalum conjugatum , where interstitial and groundwater salinity is less than 0.5 ups, it stays flooded for 5 to 9 months and the redox potential is 151.23 mV. Conclusions: In each type of vegetation, the structure, composition, and diversity are different, with a high turnover of species that indicates a gradient defined by salinity. The vegetation in the SHC follows the patterns of typical organization of the tropical coastal wetlands, mangroves, swamp forests and herbaceous wetlands, in this case the freshwater marshes and flooded pastures. The factor that define the distribution of the vegetation is the salinity and the gradient that is observed are a function of the hydrological dynamics that depends on the mixing of marine and freshwater.


6.
- Capítulo de libro con arbitraje
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Phytoremediation of soils contaminated by hydrocarbon
Chan Quijano, José Guadalupe (autor) ; Cach Pérez, Manuel Jesús (autor) ; Rodríguez Robles, Ulises (autor) ;
Disponible en línea
Contenido en: Phytoremediation: in-situ applications / editor: Brian R. Shmaefsky Geneva, Switzerland : Springer Nature Switzerland AG, 2019, 2020 páginas 83-101 ISBN:978-3-030-00098-1
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Resumen en: Inglés |
Resumen en inglés

It is estimated that more than one-third of the world soils are seriously contaminated due to anthropological activities. Much of this contamination is due to oil industry activities which cause significant changes in the ecosystems due to the processes of exploration, refining, transportation and commercialization of products derived from oil. Plants have become biotechnologies for the recovery of hydrocarbon-contaminated soils given that they can absorb and degrade significant amounts of the pollutants. Most plants live in symbiosis with ectomycorrhizal fungi and/or arbuscular mycorrhizas that can facilitate the remediation of contaminated soils. In addition, rhizosphere microorganisms such as bacteria, fungi and nematodes have the ability to consume hydrocarbons as sources of energy and carbon, thereby playing a very important role in the remediation of contaminated soils. The remediation of areas contaminated with oil hydrocarbons is making it necessary to conduct studies on each contaminant regarding the damages and/or benefits theymay be causing in the rhizosphere and in plant physiology.


7.
Artículo
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Precipitous decline of white-lipped peccary populations in Mesoamerica
Thornton, Daniel (autor) ; Reyna Hurtado, Rafael Ángel (autor) ; Perera Romero, Lucy (autora) ; Radachowsky, Jeremy (autor) ; Hidalgo Mihart, Mircea Gabriel (autor) ; García Anleu, Rony (autor) ; McNab, Roan (autor) ; Mcloughlin, Lee (autor) ; Foster, Rebecca (autora) ; Harmsen, Bart (autor) ; Moreira Ramírez, José Fernando (autor) ; Diaz Santos, Fabricio (autor) ; Jordan, Christopher A. (autor) ; Salom Pérez, Roberto (autor) ; Meyer, Ninon France Victoire (autor) ; Castañeda, Franklin (autor) ; Elvir Valle, Fausto Antonio (autor) ; Ponce Santizo, Gabriela (autora) ; Amit, Ronit (autora) ; Arroyo Arce, Stephanny (autora) ; Thomson, Ian (autor) ; Moreno, Ricardo (autor) ; Schank, Cody J. (autor) ; Arroyo Gerala, Paulina (autora) ; Bárcenas, Horacio V. (autor) ; Brenes Mora, Esteban (autor) ; Calderón, Ana Patricia (autora) ; Cove, Michael V. (autor) ; Gómez Hoyos, Diego (autor) ; González Maya, José F. (autor) ; Guy, Danny (autor) ; Hernández Jiménez, Gerobuam (autor) ; Hofman, Maarten (autor) ; Kays, Roland (autor) ; King, Travis (autor) ; Martinez Menjivar, Marcio Arnoldo (autor) ; Maza, Javier de la (autor) ; León Pérez, Rodrigo (autor) ; Ramos, Víctor Hugo (autor) ; Rivero Hernández, Crysia Marina (autora) ; Romo Asunción, Sergio (autor) ; Juárez López, Rugieri (autor) ; Jesús de la Cruz, Alejandro (autor) ; De la Torre, Jesús Antonio (autor) ; Towns, Valeria (autora) ; Schipper, Jan (autor) ; Portillo Reyes, Hector Orlando (autor) ; Artavia, Adolfo (autor) ; Hernández Pérez, Edwin Luis Oswaldo (autor) ; Martínez, Wilber (autor) ; Urquhart, Gerald R. (autor) ; Quigley, Howard (autor) ; Pardo, Lain E. (autor) ; Sáenz, Joel C. (autor) ; Sanchez, Khiavett (autora) ; Polisar, John (autor) ;
Contenido en: Biological Conservation Vol. 242, no. 108410 (2020), p. 1-12 ISSN: 0006-3207
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Resumen en: Inglés |
Resumen en inglés

Large mammalian herbivores are experiencing population reductions and range declines. However, we lack regional knowledge of population status for many herbivores, particularly in developing countries. Addressing this knowledge gap is key to implementing tailored conservation strategies forspecies whose population declines are highly variable across their range. White-lipped peccaries (Tayassupecari) are important ecosystem engineers in Neotropical forests and are highly sensitive to human disturbance. Despite maintaining a wide distributional range, white-lipped peccaries are experiencing substantial population declines in some portions of their range.We examined the regional distribution and population status of the species in Mesoamerica. We used a combination of techniques, including expert-based mapping and assessment of population status, and data-driven distribution modelling techniques to determine the status and range limits of white-lipped peccaries. Our analysis revealed declining and highly isolated populations of peccaries across Mesoamerica, with a range reduction of 87% from historic distribution and 63% from current IUCN range estimates for the region. White-lipped peccary distribution is affected by indices of human influence and forest cover, and more restricted than other sympatric large herbivores, with their largest populations confined to transboundary reserves. To conserve white-lipped peccaries in Mesoamerica, transboundary efforts will be needed that focus on both forest conservation and hunting management, increased cross-border coordination, and reconsideration of country and regional conservation priorities. Our methodology to detail regional white-lipped peccary status could be employed on other poorly-known large mammals.


8.
Artículo
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Record of haementeria acuecueyetzin (Oceguera-Figueroa, 2008) in morelet’s crocodiles from Quintana Roo, Mexico
Charruau, Pierre Alexandre Rémy Robert (autor) ; Oceguera Figueroa, Alejandro (autor) ; Cedeño-Vázquez, J.R. (autor) ; Pérez Rivera, Sergio David (autor) ;
Disponible en línea
Contenido en: Comparative Parasitology Volumen 87, número 1 (2020), p. 89-92 ISSN: 1525-2647
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Herein, we present the first Mexican record of Morelet’s crocodile, Crocodylus moreletii, as a host for the proboscis-bearing leech, Haementeria acuecueyetzin. From November 2004 to October 2017, we captured 111 crocodiles during spotlight surveys in lagoons of the Dziuché ejido, municipality of José María Morelos, Quintana Roo, Mexico. Twenty-one (18.9%) individuals had leeches identified as H. acuecueyetzin. It is the first report of H. acuecueyetzin for the State of Quintana Roo, Mexico, and the northernmost record of the species. This is also the second case of leech parasitism in C. moreletii. Haementeria acuecueyetzin likely parasitize a large array of vertebrates, and its role as apotential vector of blood parasites in C. moreletii requires further investigation.


9.
Libro
Vidas fronterizas / coordinación: Ailsa Winton ; diseño: Nancy Silva García ; fotografía de portada: Fernando Limón Aguirre
Winton, Ailsa (coordinadora) ; Silva García, Nancy (diseño) ; Limón Aguirre, Fernando (fotógrafo) (1964-) ;
San Cristóbal de Las Casas, Chiapas, México : El Colegio de la Frontera Sur. Departamento de Sociedad y Cultura , 2020
Disponible en línea
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¿Vulnerables nosotros?
Naturaleza, culturas y memorias del territorio Maya-Mam
De cerca con la migración LGBTTTI


10.
Capítulo de libro