AI Article Synopsis
- The study captured cane toads in four different regions of Mexico impacted by human activities and analyzed their liver tissue for organochlorine pesticides and polychlorinated biphenyls.
- The levels of these pollutants in the toads' livers varied significantly, with the highest levels found at two sites: one linked to industrial activities and the other to agricultural practices.
- The presence of pesticide metabolites and isomers also provided insights into both past and recent exposure, indicating that cane toads can serve as effective bioindicators for monitoring environmental pollution.
Article Abstract
In this study, we captured cane toads (Rhinella marina) in four sites located in different regions affected by anthropogenic activities in Mexico. Subsequently we analyzed liver tissue for the presence of organochlorine pesticides (OCs) and polychlorinated biphenyls (PCBs) The levels of these POPs in the toads' livers ranged from 863.2 to 3109.6 ng/g of lipid weight across all sites. A multivariate statistical analysis highlighted two sites with the highest POPs levels, with the most polluted site displaying a high level of PCBs, suggesting influence of industrial activities. The second most polluted site displayed significant amounts of OCs, linking this location to agricultural activity. Additionally, we found pesticide metabolites and isomers that allowed us to distinguish past and recent exposure events. Our observations indicate that R. marina is suitable bioindicator of sites impacted by anthropogenic activities.
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| http://dx.doi.org/10.1016/j.etap.2023.104280 | DOI Listing |
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