Results: 30

Plasma cholinesterase activity as an environmental impact biomarker in juvenile green turtles (Chelonia mydas)

Pesqui. vet. bras; 40 (1), 2020
The objective of this study was to evaluate the enzymatic activity of plasma cholinesterase in Chelonia mydas marine turtles belonging to two populations, according to their capture sites, under the absence and probable influence of anthropic effects. A total of 74 animals were used and later divided int...

Determination of acute median lethal concentration and sublethal effects on AChE activity of Gymnotus carapo (Teleostei: Gymnotidae) exposed to trichlorfon

Trichlorfon (TRF) is a pesticide widely used in aquaculture to control fish ectoparasites. This pesticide is an inhibitor of acetylcholinesterase, an essential enzyme for termination of nerve impulses. High rates of TRF use generate risks to the environment and human health. In the environment, pesticide...

Soil macrofauna associated with cover crops in an Oxisol from the southwest of Piauí state, Brazil

Arq. Inst. Biol; 87 (), 2020
The soil macrofauna is fundamental for the maintenance of soil quality. The aim of this study was to characterize the soil macrofauna under different species of cover crops, including monoculture or intercropping associated to two types of soil management in the southwest region of Piauí state. The stud...

Indicadores de avaliação de capital natural e de oferta e demanda de serviços ecossistêmicos para a Região Metropolitana de Curitiba

Esta pesquisa se situa no campo do planejamento territorial e da sustentabilidade urbana, com foco na conservação da biodiversidade e na provisão de serviços ecossistêmicos. Parte-se do pressuposto que a urbanização, embora estimule o progresso econômico, social e cultural, tem impulsionado probl...

Asociaciones polínicas de sedimentos superficiales del norte de la región chaqueña argentina

Rev. biol. trop; 66 (4), 2018
Resumen La vegetación chaqueña esta condicionada por diversas presiones ambientales que afectan la fisionomía del paisaje. Con el objetivo de reconocer cambios espaciales de la vegetación y distinguir indicadores de disturbios naturales (inundaciones, sequías) y/o antrópicos (incendios, malezas de ...

Influencia de la vigilancia en una zona rocosa dentro de un área marina protegida, Pacífico Central de Costa Rica

Rev. biol. trop; 66 (3), 2018
Resumen Los intermareales rocosos son sitios importantes para peces, aves, invertebrados y algas entre otros, que se utilizan para la extracción de recursos alimenticios para las comunidades costeras. Se presentan los resultados de la evaluación de una costa rocosa en el Pacífico Central de Costa Rica...

Abundance and diversity of black flies (Diptera: Simuliidae) in rivers of the Andean Eastern Hills of Bogotá (Colombia), and its relationship with water stream physicochemical variables

Univ. sci; 23 (2), 2018
Abstract Black flies are abundant benthic organisms in well-oxygenated running water and are considered effective bioindicators of water quality. Information on the ecology of these organisms at the species level is important, since up to now information has mainly been available on a family level. The a...

Airborne fungi isolated from different environments of a primary school in the city of Manaus, Amazonas, Brazil

Introduction: Airborne fungi can cause respiratory diseases, including pulmonary mycoses. The objective of this study was to isolate and identify airborne fungi from external and internal environments at a full-day primary school in Manaus, Brazil, and ascertain the influence of seasonality on the incide...

Descripción de casos registrados en el Centro Nacional de Toxicología (MSPyBS) por exposición debida a incendio de transformadores fuera de uso

En octubre de 2015 el depósito de transformadores fuera de uso de la Administración Nacional de Electricidad (ANDE) ubicado en San Lorenzo (Paraguay), sufrió un incendio de gran magnitud, con destrucción de transformadores, condensadores, y otros materiales que pudieron contener bifenilopoliclorados ...

Variabilidade climática, qualidade da água para abastecimento público e impactos à saúde

INTRODUÇÃO: A urbanização em bacias hidrográficas contribui para a eutrofização antrópica dos seus corpos d´água, propiciando proliferações de algas tóxicas como as cianobactérias. Existe um padrão característico de sazonalidade nas florações de algas e comunidades de cianobactérias, e...