Ecotoxicological effects of soft plastic fishing lures on the benthic amphipod Hyalella azteca

Heliyon, Journal Year: 2025, Volume and Issue: unknown, P. e43068 - e43068

Published: March 1, 2025

Highlights•Ecotoxicological effects of various soft plastic fishing lures were compared•Even diluted lure leachates caused high mortality rates in Hyallela azteca•Toxicity was reduced the presence sediment•Brand-specific differences prevailed, providing choices for less harmful products•Hazardous related to need be considered and regulatedAbstractPlastic pollution by lost, abandoned discarded commercial gear is well characterized marine systems, whereas environmental impact lost recreational freshwater systems remains unclear. Especially are increasingly used, potentially contributing waterbodies release hazardous substances such as plasticizers. The objective this study compare water- sediment-borne acute toxicity three types commonly used with benthic amphipod Hyalella azteca. A standardized test setup 96 h water-only sediment 14 d determine leachate a dilution series. Chemical composition water qualitatively analyzed. All tested - including those claiming environmentally friendly consisted PVC contained plasticizers, highly concerning diethylhexyl-phthalate dibutyl-phthalate, other additives. Depending on type, even dilutions 1.5% toxic up 100% H. azteca after hour exposures, especially treatments without sediment. Strong chemical resulting ecotoxicological among different identified. results demonstrate that currently underestimated require better documentation, awareness regulation reduce angling.Graphical abstract

Language: Английский

Unintended Consequences of Aquatic Enrichment in Experimental Biology

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 23, 2025

Enrichment in aquatic animal studies is important for promoting welfare and maintaining health can be categorized by physical, sensory, social, occupational, dietary enrichment. However, the risk of potential chemical leaching associated with physical enrichment items has been largely overlooked (i.e., artificial plants or shelter). Most lack information on their composition have not undergone testing plastic metal leachates that alter water chemistry impair physiology. In fish invertebrate research, these to modify animals reproductive processes. Moreover, toxicology altered exposure concentrations interactive effects could invalidate toxicity assays lead misleading results. We identify key contaminants common highlight substantial empirical research focusing confounding factors explore mechanisms through which relevant complicate experimental outcomes, detailing pathways substances may interact both environment themselves. conclude there widespread serious complications outcomes chronic from materials. Therefore, we advocate establishment standardized regulations a global certification system ensure validity safeguard welfare. encourage researchers critically consider implications when designing systems.

Language: Английский

Glitters in fishing ground baits – A direct source of primary microplastics in soil and freshwater ecosystems

Chemosphere, Journal Year: 2024, Volume and Issue: 369, P. 143842 - 143842

Published: Dec. 1, 2024

The aim of this paper is to draw attention the direct source primary microplastics (MPs) that have been entirely neglected so far, namely by providing qualitative studies fishing ground baits with glitters. Among many microplastic sources already detected in and angling gear reported literature, glitters synthetic pastry are only (produced < 5 mm; P-MPs), MPs placed directly into freshwater, during sports competitions individual leisure activities, were far not discussed. Dozens different fishbait products available on market containing funded represent, from material point view, three classes studied further. Fourier-transform infrared (FTIR), ATR-FTIR Raman spectroscopy combined scanning electron microscopy an energy-dispersive detector (SEM/EDS) enabled characterization their composition morphology. Glitters composite structures internal core several chemical layers symmetrically both sides. polymer origin particles, polyethylene terephthalate (PET) core, was confirmed as being essential condition classify them P-MPs. One should focus fact those designed purposely be particularly attractive ingested fishes, thus efficiently introduced trophic chain all persistent consequences, including contribution plastisphere. preliminary results environmental stability obtained accelerated ageing test discuss possible long-term ecological implications durable saltwater (both natural used for weathering chamber) seabed sediments. performed marine environments, oceans final destination most freshwater MPs. Finally, suggestions future enlarge knowledge about issue provided.

Language: Английский