A água constitui-se um recurso natural essencial aos seres vivos presente em todos os processos
bioquímicos e fisiológicos, o que torna seu acesso indispensável às populações em geral. Diante disso,
o presente estudo avaliou as características físico-químicas e microbiológicas da água proveni...
Abstract Macroinvertebrate shredders consume preferably leaves conditioned by fungi and bacteria which offer greater palatability to them. Plant species in Cerrado present high concentration of chemical elements such as lignin and cellulose, phenols and tanins thus making them less attractive for shredd...
Brasil,
Dieta,
Preferencias Alimentarias,
Herbivoria,
Insectos/fisiología,
Melastomataceae/fisiología,
Hojas de la Planta/clasificación,
Hojas de la Planta/fisiología,
Ríos/química,
Sapotaceae/fisiología,
Árboles/clasificación,
Árboles/fisiología
Abstract Population and reproductive aspects allow the knowledge and understanding of population dynamics and the influence of environmental factors, in addition to ensure the success of a species continuity. Thus, the aim of this study was to analyze population and reproductive traits of the species Hyp...
Brasil,
Characidae/fisiología,
Fertilidad,
Gónadas/crecimiento & desarrollo,
Lluvia,
Reproducción,
Ríos,
Estaciones del Año,
Razón de Masculinidad,
Temperatura,
Movimientos del Agua
Abstract INTRODUCTION: The Middle Paranapanema watershed is known for the transmission of schistosomiasis, and there have been autochthonous cases since 1952. This study aimed to describe this disease in space and time and evaluate its current importance as a public health problem. METHODS: Thematic ...
Los macroinvertebrados bentónicos cumplen funciones ecológicas importantes en los sistemas lóticos, como el traspaso de energía a través de las redes tróficas, la descomposición de la materia orgánica, el reciclaje de nutrientes y la mezcla de sedimentos. Uno de los principales factores que defin...
O entendimento das relações entre as variáveis de precipitação e nível d'água dos rios com os casos de malária podem fornecer indícios importantes da modulação da doença no contexto da variabilidade climática local. No intuito de demonstrar como essas relações variam no mesmo espaço endê...
Brasil/epidemiología,
Clima,
Vectores de Enfermedades,
Hidrología,
Incidencia,
Malaria/epidemiología,
Malaria/prevención & control,
Lluvia,
Características de la Residencia,
Ríos,
Estaciones del Año
The expansion of the Amazonian agricultural frontier represents the most extensive land cover change in the world, detrimentally affecting stream ecosystems which collectively harbor the greatest diversity of freshwater fish on the planet. Our goal was to test the hypotheses that deforestation affects th...
The aim of this paper was to report the occurrence of Austrodiplostomum spp. in the eyes and brain of Acaronia nassa, Caquetaia spectabilis, Satanoperca acuticeps, Curimatella sp. and Crenicichla marmorata in a lake of the Amazon River system in the state of Pará (Brazil). Of 49 fish examined, 10.2% wer...
ABSTRACT A bacterium isolated from Sterkfontein dam was confirmed to produce bioflocculant with excellent flocculation activity. The 16S rDNA nucleotide sequence analyses revealed the bacteria to have 99% similarity to Streptomyces platensis strain HBUM174787 and the sequence was deposited in the Genbank...
Proteínas Bacterianas/genética,
Proteínas Bacterianas/metabolismo,
Carbono/metabolismo,
Floculación,
Nitrógeno/metabolismo,
Ríos/química,
Streptomyces/química,
Streptomyces/genética,
Streptomyces/aislamiento & purificación,
Streptomyces/metabolismo,
Aguas Residuales/química,
Microbiología del Agua,
Purificación del Agua
Abstract Large reservoirs usually present spatial gradients in fish assemblage, distinguishing three strata (littoral, pelagic, and bathypelagic) along the vertical and horizontal axes, and three zones (fluvial, transitional, and lacustrine) along the longitudinal axis. The main objective of this study w...
