Encontrados 14 documentos, a visualizar página 1 de 2
Confirmatory assays for transient changes of omics in soil invertebrates - copp...
Bicho, Rita C.; Faustino, A. M. R.; Rêma, A.; Scott-Fordsmand, Janeck J.; Amorim, Mónica J. B.Environmental risk assessment (ERA) based on effects caused by chronic and longer term exposure is highly relevant. Further, if mechanistic based approaches (e.g. omics) can be included, beyond apical endpoints (e.g. reproduction), the prediction of effects increases. For Cu NMs (and CuCl2) this has been studied in detail, covering multi-omics and apical effects using the soil standard species Enchytraeus crypt...
Effects of europium polyoxometalate encapsulated in silica nanoparticles (nanoc...
Bicho, Rita C.; Soares, Amadeu M. V. M.; Nogueira, Helena I. S.; Amorim, Monica J. B.Polyoxometalates (POMs) are metal oxo clusters that have been investigated for several applications in material sciences, catalysis, and biomedicine; these gained increasing interest in the field of nanotechnology as nanocarriers for drug delivery. Associated to the increasing applications, there is the need for information regarding the effects on the environment of these compounds, which is completely absent ...
Enchytraeid Reproduction Test(PLUS): hatching, growth and full life cycle test-...
Bicho, Rita C.; Santos, Fátima C. F.; Gonçalves, Micael F. M.; Soares, Amadeu M. V. M.; Amorim, Mónica J. B.Soil ecotoxicity standard tests for invertebrates are usually limited to the assessment of endpoints like survival and reproduction. Adverse effects may occur at other developmental stages, e.g. embryo development, hatching or growth. The species Enchytraeus crypticus is a model organism in the standard soil ecotoxicology test, where survival and reproduction are assessed. In the present study we optimized the ...
Development of an embryotoxicity test for Enchytraeus crypticus: the effect of Cd
Gonçalves, Micael F. M.; Bicho, Rita C.; Rêma, Alexandra; Soares, Amadeu M. V. M.; Faustino, Augusto M. R.; Amorim, Mónica J. B.The existing standard enchytraeid reproduction test (ERT) concerns the assessment of effects on survival and reproduction. In the present study we optimized and propose an embryotoxicity test using Enchytraeus crypticus. Cadmium (Cd) was used as a test substance. Endpoints evaluated were embryo development, number of embryonic structures, Calcium (Ca) channels quantification and hatching success with macroscopi...
Non-avoidance behaviour in enchytraeids to boric acid is related to the GABAerg...
Bicho, Rita C.; Gomes, Susana I. L.; Soares, Amadeu M. V. M.; Amorim, Mónica J. B.Soil invertebrates, e.g. enchytraeids, are known to be able to avoid unfavourable conditions, which gives them an important ecological advantage. These organisms possess chemoreceptors that can detect stressors, which in turn activate responses such as avoidance behaviour. We studied the avoidance behaviour in response to boric acid (BA) using enchytraeids. Results showed not only no avoidance, but that increas...
Thyroid disruption in the lizard Podarcis bocagei exposed to a mixture of herbi...
Bicho, Rita C.; Amaral, Maria José; Faustino, Augusto M. R.; Power, Deborah; Rêma, Alexandra; Carretero, Miguel A.; Soares, Amadeu M. V. M.Pesticide exposure has been related with thyroid disrupting effects in different vertebrate species. However, very little is known about the effects of these compounds in reptiles. In the Mediterranean area, lacertid lizards are the most abundant vertebrate group in agroecosystems, and have been identified as potential model species for reptile ecotoxicology. The aim of this study was to understand if the herbi...
Thyroid disruption in the lizard Podarcis bocagei exposed to a mixture of herbi...
Bicho, Rita C.; Amaral, Maria José; Faustino, Augusto M. R.; Power, Deborah M.; Rêma, Alexandra; Carretero, Miguel A.; Soares, Amadeu M. V. M.Pesticide exposure has been related with thyroid disrupting effects in different vertebrate species. However, very little is known about the effects of these compounds in reptiles. In the Mediterranean area, lacertid lizards are the most abundant vertebrate group in agroecosystems, and have been identified as potential model species for reptile ecotoxicology. The aim of this study was to understand if the herbi...
Biomarkers of exposure and effect in a lacertid lizard (Podarcis bocagei Seoane...
Amaral, Maria José; Sanchez-Hernandez, Juan C.; Bicho, Rita C.; Carretero, Miguel A.; Valente, Ricardo; Faustino, Augusto M. R.; Soares, Amadeu M. V. M.In Europe, reptiles have been recently included in environmental risk-assessment processes for registration of plant-protection products. However, data on toxicity effects of most compounds are lacking. Chlorpyrifos is the most commonly used organophosphorus insecticide worldwide. In the present study, the authors exposed a lacertid lizard, Podarcis bocagei, to sublethal concentrations of chlorpyrifos. Individu...
The usefulness of mesocosms for ecotoxicity testing with lacertid lizards
Amaral, Maria José; Bicho, Rita C.; Carretero, Miguel A.; Sanchez-Hernandez, Juan C.; Faustino, Augusto; Soares, Amadeu M. V. M.; Mann, Reinier M.Mesocosms (i.e., outdoor, man-made representations of natural ecosystems) have seldom been used to study the impact of contaminants on terrestrial ecosystems. However, mesocosms can be a useful tool to provide a link between field and laboratory studies. We exposed juvenile lacertid lizards for a period of over one year to pesticides (herbicides and insecticides) in mesocosm enclosures with the intention of val...
The use of a lacertid lizard as a model for reptile ecotoxicology studies - par...
Amaral, Maria José; Carretero, Miguel A.; Bicho, Rita C.; Soares, Amadeu M. V. M.; Mann, Reinier M.At the European level, lacertid lizards have been proposed as potential model species for reptile ecotoxicology. We studied demographic and morphological aspects of natural field subpopulations of Podarcis bocagei inhabiting similar agricultural habitats which were either regularly exposed to pesticides, or not. Parameters examined in this study included population size and density, sex ratio, adult body size, ...