Ecotoxicological assessment of pesticide mixtures: effects of imidacloprid and propiconazole on Danio rerio and Astyanax lacustris.

Despite global efforts to promote sustainable agriculture, the increasing use of pesticides remains a critical concern, particularly in local ecosystems with limited environmental monitoring. This study aimed to evaluate the toxicological effects of the insecticide @Provado (imidacloprid) and the fungicide @Tilt (propiconazole) on two freshwater fish species, Danio rerio (zebrafish) and Astyanax lacustris (lambari). Standard ecotoxicological parameters (EC₅₀, LC₅₀, EC₁₀, NOEC, and LOEC) were determined for each pesticide individually and in combination to assess toxicity and potential additive, synergistic, or antagonistic interactions.

Dietary Phosphorus Requirement for Tambaqui, Colossoma macropomum, in the Grow-Out Phase.

Phosphorus is essential for fish growth as it is crucial in skeletal development and metabolic reactions. The dietary requirement for this mineral varies among fish species and growth stages. Therefore, the objective of this study was to determine the available phosphorus (AP) requirement for tambaqui during the grow-out phase (± 400 to 1000 g) using growth parameters, whole-body macronutrient composition, whole-body, scales, and bone mineral content, biochemical blood parameters, and activity of antioxidant enzymes as response parameters.

Contribution of Amino Acids in Cereal Grain Products to Precision Feed Formulation for Tambaqui (Colossoma macropomum) Using a Digestibility Approach.

Although cereal grain products have low protein content, they can contribute up to 25% of total protein in low-trophic level/omnivorous fish diets. Thus, understanding the amino acid contribution of these ingredients becomes crucial for meeting the dietary requirements of omnivorous fish. A digestible nutrient basis is essential for precise feed formulation.

Duckweed application in nature-based system for water phytoremediation and high-value coproducts at family agrisystem from a circular economy perspective.

Duckweeds are widely recognized for their efficiency in the phytoremediation of agricultural and industrial effluents. This study had two main objectives: 1) Implement a Nature-based Solutions (NBS) utilizing the environmental services of duckweeds to improve water quality through phytoremediation in small fish farms; 2) Analysis of duckweeds biomass produced in these fish farms to develop coproducts from a circular economy perspective in family agrisystem in Brazilian Atlantic Forest. The effectiveness of the phytoremediation system was assessed by the reduction of the Trophic State Index (TSI).

Economic and financial risks of commercial tilapia cage culture in a neotropical reservoir.

The aim of this study was to analyze the financial and economic risks of tilapia cage culture across different production water volumes (m³). The production water volumes evaluated were 10 to 50 thousand m³ (Small Volume, SV), 51 to 150 thousand m³ (Medium Volume, MV), 151 to 300 thousand m³ (Large Volume, LV), and >301 thousand m³ (Extra-Large Volume, ELV). Productivity and economic data were obtained from a commercial Nile tilapia cage farm with 232 net cages installed in a neotropical reservoir, in Brazil, from 2017 to 2019.