Results 81 to 90 of about 9,078 (165)

O uso de biomarcadores para avaliar o impacto ambiental de contaminantes em rios Mediterrâneos

, 2010
Doutoramento em BiologiaUm assunto que requer atenção é a avaliação ecológica da qualidade da água de ecossistemas de água doce. Uma abordagem que surge como promissora é a biomonitorização baseada em biomarcadores, porque pode avaliar a saúde dos ...
Damásio, Joana Bastos
core  

Single nucleotide polymorphism discovery from expressed sequence tags in the waterflea Daphnia magna

BMC Genomics, 2011
Background Daphnia (Crustacea: Cladocera) plays a central role in standing aquatic ecosystems, has a well known ecology and is widely used in population studies and environmental risk assessments.
Souche Erika L, Jansen Mieke, Orsini Luisa, Geldof Sarah, De Meester Luc   +4 more
doaj   +1 more source

Efeitos de poluentes e stressores naturais em organismos planctónicos

, 2008
Mestrado em Toxicologia e EcotoxicologiaAo longo dos anos e com a crescente modernização da sociedade actual, diversos produtos químicos são libertados no meio ambiente, afectando-o gradualmente.
Martins, Maria Alexandra Santos
core  

Transcriptome sequencing of a keystone aquatic herbivore yields insights on the temperature-dependent metabolism of essential lipids

BMC Genomics, 2019
Background Nutritional quality of phytoplankton is a major determinant of the trophic transfer efficiency at the plant-herbivore interface in freshwater food webs.
Heidrun S. Windisch, Patrick Fink
doaj   +1 more source

Comparison of Diazinon Toxicity to Temperate and Tropical Freshwater Daphnia Species

Journal of Chemistry, 2018
The presence of pesticides in water bodies presents unique challenges to the ecosystem and all the life forms. Biological methods have been widely used to examine the toxic effects of various toxicants including pesticides.
Thanh-Luu Pham, Ha Manh Bui
doaj   +1 more source

Can Daphnia lumholtzi invade European lakes?

, 2013
The cladoceran Daphnia lumholtzi is a subtropical and tropical zooplankter, and an invasive species in North America. Thus far, D. lumholtzi has not been detected in Europe.
Jonathan Jeschke, Harz,Eva-Maria, Meike Wittmann, Wittmann,Meike, Gabriel,Wilfried, Jeschke,Jonathan M., Wittmann, Meike, Gabriel, Wilfried, Harz, Eva-Maria, Jeschke, Jonathan, Jeschke, Jonathan M., Christian Laforsch, Laforsch, Christian, Laforsch,Christian, Laforsch, Christian,, Jeschke, Jonathan M, Wittmann, Meike J., Eva-Maria Harz, Wilfried Gabriel   +18 more
core   +1 more source

Novel approaches to toxicity testing in Daphnia magna

, 2010
Current regulatory risk assessment strategies have several limitations, such as linking subcellular changes to higher-level biological effects, and an improved knowledge-based approach is needed.
Taylor, Nadine Suzanne
core  

Benefits of host genetic diversity for resistance to infection depend on parasite diversity [PDF]

, 2010
Host populations with high genetic diversity are predicted to have lower levels of infection prevalence. This theory assumes that host genetic diversity results in variation in susceptibility and that parasites exhibit variation in infectivity. Empirical
Ganz, H., Ebert, Dieter, Ganz, Holly H.
core  

Efectos del cromo hexavalente y un carbamato sobre dos especies de cladoceros

Acta Biológica Colombiana, 1999
The effect of a carbamate and a heavy metal was evaluated on survival, sexual maturation and fertility of the acuatic cladocerans Daphnia magna and Daphnia obtusa. Alcute toxicity -LC50 and chronic toxicity-CV values were determined. For D. magna LC50 Cr+
Carmen Reyes Blandon, Consuelo Diaz B.
doaj  

Toxicogenomic responses in Daphnia magna

, 2021
Detection of various organic contaminants in the aquatic environment at low concentrations, has raised concerns for animal and human health. Structural similarities of these compounds to estrogens and ecdysones suggests that organic pollutants may interfere with hormonal system of aquatic organisms.
openaire   +1 more source