The conspecific alarm substance (CAS), a chemical compound likely based on glycosaminoglycans, purines, and nitrogen oxide-based pterins, is a natural stressor released by specialized epidermal cells damaged by injury or attack in fish, inducing hormonal and behavioral changes in conspecifics. Its effects in the reproductive context are poorly understood, but previous studies have demonstrated earlier spawning in broodstock ex...

Thiamethoxam (TMX) is a widely used neonicotinoid insecticide with high water solubility, which increases the likelihood of contamination in freshwater systems. Here, we assessed lethal and sublethal effects of TMX on the early life stages of the Neotropical Amazonian fish Astyanax bimaculatus. Two assays were performed: (i) embryonic exposure under static conditions (0, 0.05, 0.5, 5, and 50 mg/L; 200 embryos per treatment) an...

Motivation Aquatic insects comprise 64% of freshwater animal diversity and are widely used as bioindicators to assess water quality impairment and freshwater ecosystem health, as well as to test ecological hypotheses. Despite their importance, a comprehensive, global database of aquatic insect occurrences for mapping freshwater biodiversity in macroecological studies and applied freshwater research is missing. We aim to fill t...