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Concentrations of bisphenols and phthalate esters in the muscle of Mediterranean striped dolphins (Stenella coeruleoalba). | LitMetric

Concentrations of bisphenols and phthalate esters in the muscle of Mediterranean striped dolphins (Stenella coeruleoalba).

Chemosphere

Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology. University of Barcelona, 08028, Barcelona, Spain; Biodiversity Research Institute (IRBio). University of Barcelona, 08028, Barcelona, Spain.

Published: October 2023

AI Article Synopsis

  • Bisphenols (BPs) and phthalate esters (PAEs) are widely used in plastics and are environmental contaminants that can disrupt endocrine systems in living organisms, particularly affecting long-lived species like cetaceans.
  • A study measured the concentrations of 10 BPs and 13 PAEs in the muscle of 30 stranded striped dolphins along the Spanish coast from 1990 to 2018, finding notable levels of these compounds, especially 4,4'-(cyclohexane-1,1-diyl)diphenol (BPZ).
  • Findings indicated that biological factors like sex and maturity had minimal impact on chemical concentrations, with some temporal variations observed in specific compounds, suggesting changes in production

Article Abstract

Bisphenols (BPs) and phthalate esters (PAEs) are important compounds for the plastics industry, also called "everywhere chemicals" due to their ubiquity in daily use products. Both chemical groups are well-known environmental contaminants, whose presence has been reported in all environmental compartments, and whose effects, mainly associated to endocrine disruption, are detrimental to living organisms. Cetaceans, due to their long life-span, low reproduction rate and high position in the trophic web, are especially vulnerable to the effects of contaminants. However, little is known about BP and PAE concentrations in cetacean tissues, their potential relation to individual biological variables, or their trends over time. Here, the concentration of 10 BPs and 13 PAEs was assessed in the muscle of 30 striped dolphins (Stenella coeruleoalba) stranded along the Spanish Catalan coast (NW Mediterranean) between 1990 and 2018. Six BP and 6 PAE compounds were detected, of which only 4,4'-(cyclohexane-1,1-diyl)diphenol (BPZ) was detected in all the samples, at the highest concentration (mean 16.06 μg g lipid weight). Sex or reproductive condition were largely uninfluential on concentrations: only dimethylphthalate (DMP) concentrations were significantly higher in immature individuals than in adults, and the overall PAE concentrations were significantly higher in males than in females. Temporal variations were only detected in bis(4-hydroxyphenyl)ethane (BPE), diethylphthalate (DEP) and dimethylphthalate (DMP), whose concentrations were lower, and 9,9-Bis(4-hydroxyphenyl)fluorene (BPFL), which were higher, respectively, in samples taken between 2014 and 2018, probably reflecting shifts in the production and use of these chemicals. These results provide the first assessment of concentrations of several BP and PAE compounds in the muscle of an odontocete cetacean.

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Source
http://dx.doi.org/10.1016/j.chemosphere.2023.139686DOI Listing

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