Abstract Fishes inhabiting Amazonian floodplain lakes exhibits a great variety of body shape, which was a key advantage to colonize the several habitats that compose these areas adjacent to the large Amazon rivers. In this paper, we did an ecomorphological analysis of twenty abundant species, sampled in ...
Abstract:The detailed response of tropical lake phytoplankton to weather variations has been little studied, but it seems that composition varies in response to rain and wind variability over the course of the year. In order to gather more evidence on this variation, the weekly variability of phytoplankt...
Análisis por Conglomerados,
Costa Rica,
Cianobacterias/crecimiento & desarrollo,
Lagos/microbiología,
Fitoplancton/microbiología,
Fitoplancton/fisiología,
Valores de Referencia,
Estaciones del Año,
Especificidad de la Especie,
Temperatura,
Factores de Tiempo
Abstract Cladocerans are able to produce resting eggs inside a protective resistant capsule, the ephippium, that difficults the visualization of the resting eggs, because of the dark pigmentation. Therefore, before hatching experiments, methods to verify viable resting eggs in ephippia must be considered...
The origin of life is a very rich field, filled with possibilities and ripe for discovery. RNA replication requires chemical energy and vesicle division is easy to do with mechanical energy. These requirements point to a surface lake, perhaps at some time following the period of concentrated cyanide chem...
ResumenLos peces exhiben diversas estrategias de alimentación que pueden sufrir modificaciones a través de la ontogenia o estacionalmente con implicaciones ecológicas en las cadenas tróficas. Aún cuando se reconoce la importancia de los peces como depredadores tope, la dieta de muchos de ellos es to...
AbstractTestate amoebae are common single-celled eukaryotic organisms in aquatic ecosystems. Despite their important role in these ecosystems, and their potential as bioindicators and paleoindicators, they remain poorly studied in Mexico. The major objectives of this study were to: 1) increase knowledge ...
Background Alkaline proteases are among the most important classes of industrial hydrolytic enzymes. The industrial demand for alkaline proteases with favorable properties continues to enhance the search for new enzymes. The present study focused on isolation of new alkaline producing alkaliphilic bacter...
Bacillus/enzimología,
Bacillus/aislamiento & purificación,
Proteínas Bacterianas/metabolismo,
Endopeptidasas/metabolismo,
Fermentación,
Álcalis,
Cloruro de Sodio,
Lagos,
Temperatura,
Concentración de Iones de Hidrógeno,
Tolerancia a la Sal
Laguna Azul is an oligotrophic lake situated at 4,560 m above sea level and subject to a high level of solar radiation. Bacterioplankton community composition (BCC) was analysed by denaturing gradient gel electrophoresis and the impact of solar ultraviolet radiation was assessed by measuring cyclobutane ...
Background: Cyclodextrin glucanotransferase (CGTase) is one of the most industrially important enzymes used in the commercial production of cyclodextrins (CDs). Alkaliphilic bacteria have attracted much interest in the last few decades because of their ability to produce extracellular enzymes that are ac...
Bacillaceae/enzimología,
Glucosiltransferasas/biosíntesis,
Lagos/microbiología,
Bacillaceae/aislamiento & purificación,
Adsorción,
Cromatografía por Intercambio Iónico,
Temperatura,
Concentración de Iones de Hidrógeno,
Cinética,
Peso Molecular,
Estabilidad de Enzimas,
Glucosiltransferasas/metabolismo
Ilha Grande National Park is an important conservation unit localized in the Southern part of the upper Paraná river floodplain (Brazil) that includes diverse aquatic environments. Oligochaeta (Annelida) is a large group of invertebrates, with several small specimens inhabiting almost every possible nic...
