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Organophosphate contaminants in North Atlantic fin whales. | LitMetric

Organophosphate contaminants in North Atlantic fin whales.

Sci Total Environ

Institute of Biodiversity Research (IRBio), Department of Evolutionary Biology, Ecology and Environmental Sciences, Universitat de Barcelona, Barcelona, Spain.

Published: June 2020

AI Article Synopsis

  • Pollution of marine environments by plastic litter and associated chemical additives, particularly organophosphate flame retardants (OPFRs), poses a significant threat to marine life.
  • A study analyzed OPFR levels in fin whale muscle and krill samples collected off West Iceland, finding 7 types of OPFRs in whales and 5 in krill, with certain compounds being the most prevalent.
  • The results indicate that while OPFRs are present in fin whales for the first time, there is no evidence supporting significant bioaccumulation or biomagnification of these chemicals through the marine food web.

Article Abstract

Pollution of the marine environment by litter composed of plastics is a growing concern. Chemical additives such as organophosphate flame retardants (OPFRs), which are added to plastics to improve their qualities, are in focus because they allegedly cause adverse effects on marine fauna. Here we analyse OPFR levels in the muscle of fin whales because, as a mysticete, this cetacean obtains its food by filter-feeding and is thus highly vulnerable to marine litter. Moreover, the fin whale performs long-range migrations from low-latitude areas in winter to high-latitude areas in summer, a trait that makes it a potentially good large-scale biomonitor of pollution. We also analyse OPFR levels in its main prey, the krill Meganyctiphanes norvegica, to assess transfer through diet. The samples analysed consisted of muscle tissue from 20 fin whales and whole-body homogenates of 10 krill samples, all collected off West Iceland. From the 19 OPFRs analysed, we detected 7 in the fin whale and 5 in the krill samples. Tri-n-butyl phosphate (TNBP), Isopropylated triphenyl phosphate (IPPP) and Triphenylphosphine oxide (TPPO) were the most abundant compounds found in both species. Mean ∑OPFR concentration, expressed on a lipid weight basis, was 985 (SD = 2239) ng g in fin whale muscle, and 949 (SD = 1090) ng g in krill homogenates. These results constitute the first evidence of the presence of OPFRs in the tissues of fin whales. Furthermore, they seem to support the non-significance of bioaccumulation of OPFRs through lifespan and of biomagnification trough the food web.

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Source
http://dx.doi.org/10.1016/j.scitotenv.2020.137768DOI Listing

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