Occurrence, maternal transfer, and risk implications of parabens in humpback dolphins from the South China Sea
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View abstract on PubMed
Summary
This summary is machine-generated.Parabens (PBs) are found in Indo-Pacific humpback dolphins, posing health risks. Methylparaben levels are increasing, indicating long-term dangers for dolphin populations in the South China Sea.
Area Of Science
- Environmental Science
- Marine Biology
- Toxicology
Background
- Parabens (PBs) are widely used preservatives found in various products.
- Environmental detection of PBs is increasing, but their impact on marine apex predators is unclear.
- Indo-Pacific humpback dolphins in the South China Sea are potential sentinels for marine pollution.
Purpose Of The Study
- To investigate the bioaccumulation of parabens and their metabolites (m-PBs) in Indo-Pacific humpback dolphins.
- To assess the potential health risks associated with paraben exposure in this species.
- To examine temporal trends of paraben contamination in the northern South China Sea.
Main Methods
- Analysis of hepatic tissues from 87 Indo-Pacific humpback dolphins (2004-2021).
- Quantification of four PBs and five m-PBs using advanced analytical techniques.
- Risk assessment based on detected concentrations and established toxicity thresholds.
Main Results
- Five target PBs/m-PBs were detected, with total concentrations comparable to persistent organic pollutants.
- Transplacental transfer of PBs/m-PBs was confirmed, with OH-MEP showing high efficiency.
- Over 45% of non-calf dolphins had hepatic methylparaben levels exceeding toxicity thresholds.
Conclusions
- This study provides the first evidence of paraben occurrence and associated health risks in South China Sea dolphins.
- Increasing methylparaben trends suggest escalating future risks for dolphin populations.
- Urgent mitigation of paraben contamination in the South China Sea is recommended.
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