Results 21 to 30 of about 10,636 (159)
La leptospirosis es la enfermedad zoonótica más ampliamente distribuida a nivel mundial, la cual es causada por 17 especies de espiroquetas del género Leptospira.
Anabel Cruz-Romero +7 more
doaj +2 more sources
Se realizó un estudio citogenético en células de meristemos radiculares de individuos de Calochortus barbatus de la Reserva Ecológica del Pedregal de San Ángel, en México, D.F. Luego de aplicar una metodología de extendido y secado al aire se confirma un
Fernando Tapia-Pastrana
doaj +2 more sources
Se describen las anormalidades florales presentes en varios individuos de Phytolacca icosandra L. del Pedregal de San Ángel, en áreas cercanas a los edificios de la Facultad de Ciencias de la Universidad Nacional Autónoma de México, las cuales ...
Ramiro Cruz Dur\u00E1n +1 more
doaj +2 more sources
Antecedentes y Objetivos: Tigridia pavonia fue propuesto como un taxon alotetraploide 2n=4x=28, pero sin evidencia citogenética que sustente su origen híbrido.
Fernando Tapia-Pastrana +1 more
doaj +2 more sources
Se empleó una muestra de 30 individuos de una población de Milla biflora de la Reserva Ecológicadel Pedregal de San Ángel, en México, D. F., para analizar la arquitectura y comportamiento de los cromosomasmitóticos en células de meristemos radiculares ...
Fernando Tapia-Pastrana
doaj +2 more sources
Background matching, disruptive coloration, and differential use of microhabitats in two neotropical grasshoppers with sexual dichromatism. [PDF]
In this study, we found chromatic differences in two grasshopper species of the Sphenarium genus in different microhabitats that may be explained by local adaptation. We also found that the females and males of both species are dichromatic and seem to follow different color cryptic strategies: males depend on disruptive elements, whereas females have a
Ramírez-Delgado VH +1 more
europepmc +2 more sources
La Reserva Ecológica del Pedregal de San Ángel de Ciudad Universitaria (REPSA-CU) alberga una fracción del derrame original de lava del volcán Xitle y actualmente el suelo y la comunidad vegetal son afectados por la fragmentación del paisaje, el depósito
Iván Castellanos Vargas +2 more
doaj +2 more sources
Soil microarthropods and their relationship to higher trophic levels in the Pedregal de San Angel Ecological Reserve, Mexico. [PDF]
Soil fauna is essential for ecosystem dynamics as it is involved in biogeochemical processes, promotes nutrient availability, and affects the animal communities associated with plants.
Callejas-Chavero A +5 more
europepmc +2 more sources
Host-plant sex and phenology of Buddleja cordata Kunth interact to influence arthropod communities. [PDF]
We present the results of an empirical study that evaluates the effect of plant sex on its associated arthropod communities. Our results indicate that plant sex has a seasonal and alternating effect on the arthropod community diversity—male plants hosting a more diverse community of arthropods during the flowering season, while female plants do during ...
González-Ramírez I +4 more
europepmc +2 more sources
Free-ranging and feral dogs represent a group of unattended companion animals. They impact wild animal populations by predating native species, displacing predators and introducing exotic pathogens.
P. Arenas +5 more
semanticscholar +1 more source

