Ocean acidification impairs growth and induces oxidative stress in the macroalgae Ulva fasciata and Petalonia fascia.

Ocean acidification (OA), driven by increasing anthropogenic CO uptake, poses a significant threat to marine ecosystems; understanding the physiological responses of key primary producers like macroalgae is crucial for predicting ecological consequences. This study investigated the impacts of OA on the green alga Ulva fasciata and the brown alga Petalonia fascia. We aimed to determine the effects of decreased pH on their growth, photosynthetic performance, biochemical composition, and oxidative stress responses.

Systematic Review and Meta-Analysis of the Prevalence of Physical Activity in South American Children.

Objectives: This study aimed to systematically review and apply meta-analytic procedures to investigate the prevalence and time spent in different physical activity (PA) intensities among South American children across the childhood spectrum, according to sex and protocol used.

Methods: We searched PubMed, Web of Science, Scopus, Latin American and Caribbean Health Sciences Literature (LILACS), and Scientific Electronic Library Online (SCiELO); only studies with children between 0 and 11 years were included. Random-effects meta-analysis models were used to calculate the pooled estimates with their respective 95% confidence intervals (CI).

Household physical activity contributions to total physical activity and its associations with cardiometabolic risk factors: a Brazilian adult population analysis.

Background: Physical activity (PA) is well-recognized as a healthy behavior. However, there is insufficient evidence to differentiate the effect of accumulating PA in different PA domains (leisure-time, work, transportation, and household). We analyzed the contribution of household physical activity (HPA) to total physical activity (TPA) and its associations with cardiometabolic risk factors (CMRFs) in Brazilian adults.

Microplastic contamination and biological alterations in Atlantic wild fish populations, and human health risks associated to fillet consumption.

This study tested the hypothesis that long-term exposure to microplastics (MPs) is causing biological alterations in North Atlantic wild populations of Trisopterus luscus (pouting) and Merluccius merluccius (hake). It also estimated the human risk of MP intake (HRI) through fillet consumption, and combined the HRI and polymer health hazard in the Risk of Intake and Polymer Hazard Index (RIPHI). Fish (103) were analysed for MPs (gastrointestinal tract, gills, liver, brain, muscle), biomarkers (physical condition, neurotoxicity, energy production, oxidative stress and damage) and general stress (Integrated Biomarker Response - IBR).

Relations between microplastic contamination and stress biomarkers under two seasonal conditions in wild carps, mullets and flounders.

Potential effects of microplastics (MP, plastic particles <5 mm) on the levels of multiple stress biomarkers were investigated in wild fish populations of Cyprinus carpio, Mugil cephalus, Platichthys flesus captured in the Minho River estuary located in the Iberian Peninsula. Specimens were collected in March and September 2018, corresponding to the end of winter and summer, respectively. Based on the concentration of MP determined by FT-IR analysis and morphological inspection, fishes from each species were divided into two groups: ≤0.