10 documents found, page 1 of 1
The use of muscle biomarkers for assessing physiological effects of heavy metal...
Quina, Ana Sofia; Rodrigues, Andreia C. M.; Soares, Amadeu M. V. M.; da Luz Mathias, Maria; Gravato, CarlosThe greater white-toothed shrew Crocidura russula has been used as a sentinel species for estimating environmental risks to human populations. Previous studies in mining areas have focused on the liver of shrews as the primary target of physiological and metabolic changes due to heavy metal pollution. However, populations persist even when detoxification by the liver seems to be compromised and damage is observ...
Sustainable feed formulation to community‐based aquaculture: Oreochromis niloti...
Pires, Sílvia F. S.; Vital, Inês; Pereira, Vitória; Bustani, Henriques; Aragão, Cláudia; Engrola, Sofia; Cabano, Miguel; Dias, JorgeCommunity-based aquaculture can reduce dependence on natural resources, promote biodiversity conservation, and improve local economies and food security. However, this activity is highly dependent on local conditions regarding natural resources, such as the availability of produced organisms, adequate feeds, and environmental factors. As ectothermic organisms, fish are more susceptible to temperature fluctuatio...
Can the toxicity of polyethylene microplastics and engineered nanoclays on flat...
Santana, Lígia M. B. M.; Rodrigues, Andreia C. M.; Campos, Diana; Kaczerewska, Olga; Figueiredo, Joana; Silva, Sara; Sousa, Isabel; Maia, FredericoMicroplastics and nanomaterials are applied in a myriad of commercial and industrial applications. When leaked to natural environments, such small particles might threaten living organisms' health, particularly when considering their potential combination that remains poorly investigated. This study investigated the physiological and biochemical effects of polyethylene (PE; 64-125 μm in size, 0.1, 1.0, and 10.0...
Ecophysiological effects of mercury bioaccumulation and biochemical stress in t...
Rodrigues, Andreia C. M.; Gravato, Carlos; Galvão, Daniela; Silva, Virgília S.; Soares, Amadeu M. V. M.; Gonçalves, Jorge M. S.; Ellis, Jim R.Mercury (Hg) is a non-essential metal that can have toxic effects on the fitness of organisms and tends to bioaccumulate with age and to biomagnify in higher trophic levels. Few studies have assessed oxidative stress and neurotoxicity in deep-water sharks. This study evaluated early ontogenetic changes and physiological effects (antioxidant defences, oxidative damage, aerobic metabolism and neurotransmission fu...
Organic solvents alter photophysiological and oxidative stress profiles of the ...
Machado E Silva, Davide A.; Costa, Ana P. L.; Rodrigues, Andreia C. M.; Bem-Haja, Pedro; Pires, Sílvia S. F.; Soares, Amadeu M. V. M.Coral reefs are declining, affected by climate change and escalating anthropogenic pressures, such as pollution or habitat alteration. Consequently, ecotoxicological assays with tropical corals have increased, specifically towards the study of emergent or persistent pollutants. However, standardized methodology to test for corals is non-existent, and their response to organic solvents, recurrently required in e...
Dietary natural plant extracts can promote growth and modulate oxidative status...
Xavier, Maria João; Conceição, Luís E. C.; Valente, Luisa M. P.; Colen, R.; Rodrigues, Andreia C. M.; Rocha, Rui J. M.; L, Custódio; Carballo, CarlosPlant extracts are known for their high content and diversity of polyphenols, which can improve fish oxidative status. A growth trial with Senegalese sole postlarvae (45 days after hatching) fed with one of four experimental diets—control (CTRL), and supplemented with curcumin (CC), green tea (GT), and grape seed (GS) extracts—was performed to assess if supplementation could improve growth performance and oxida...
Combined effects of predation risk and food quality on freshwater detritivore i...
Bordalo, Maria D.; Vieira, Hugo C.; Rodrigues, Andreia C. M.; Rosa, Rita; Soares, Amadeu M. V. M.; Pestana, João L. T.Because both predation risk and resource quality have a pivotal role in ecological communities, their combined effects were assessed in stream detritivores. Bioassays were conducted using a simplified trophic chain, coupling effects of predation risk and basal resources with different nutritious qualities, namely, a predator planarian Dugesia subtentaculata, a caddisfly shredder Sericostoma vittatum, a dipteran...
Sensitivity of the sea snail Gibbula umbilicalis to mercury exposure - linking ...
Cabecinhas, Adriana S.; Novais, Sara C.; Santos, Sílvia C.; Rodrigues, Andreia C. M.; Pestana, João L. T.; Soares, Amadeu M. V. M.; Lemos, Marco F. L.Mercury contamination is a common phenomenon in the marine environment and for this reason it is important to develop cost-effective and relevant tools to assess its toxic effects on a number of different species. To evaluate the possible effects of Hg in the sea snail Gibbula umbilicalis, animals were exposed to increasing concentrations of the contaminant in the ionic form for 96 h. After this exposure period...
Sub-lethal toxicity of environmentally relevant concentrations of esfenvalerate...
Rodrigues, Andreia C. M.; Gravato, Carlos; Quintaneiro, Carla; Barata, Carlos; Soares, Amadeu M. V. M.; Pestana, João L. T.Integrative studies focused on sub-organismal responses to pyrethroid exposure are important to understand life history responses. In this study, the ecotoxicological effects of esfenvalerate (ESF) on Chironomus riparius were assessed using five biochemical biomarkers related to neurophysiological function (acetylcholinesterase) and oxidative stress (catalase; glutathione-S-transferase; total glutathione and li...
Mercury toxicity to freshwater organisms: extrapolation using species sensitivi...
Rodrigues, Andreia C. M.; Jesus, Fátima T.; Fernandes, Marco A. F.; Morgado, Fernando; Soares, Amadeu M. V. M.; Abreu, Sizenando N.Mercury toxicity to aquatic organisms was evaluated in different taxonomic groups showing the following species sensitivity gradient: Daphnia magna > Daphnia longispina > Pseudokirchneriella subcapitata > Chlorella vulgaris > Lemna minor > Chironomus riparius. Toxicity values ranged from 3.49 μg/L (48 h-EC₅₀ of D. magna) to 1.58 mg/L (48 h-EC₅₀ of C. riparius). A species sensitivity distribution was used to est...