Temporal trends of halogenated and organophosphate contaminants in striped dolphins from the Mediterranean Sea

Temporal Trends of Alternative Halogenated Flame Retardants in Humpback Dolphins from the South China Sea

“…No measurable trends were observed for HBB (Figure g), but a lower detection frequency of HBB was found in the later time period than in the earlier period (Table S5), suggestive of its potential downward trends over time. Similar descending trends were documented in striped dolphins from the Mediterranean Sea collected between 1990 and 2018, as well as in St. Lawrence Estuary belugas from 1997 to 2013. , Historically, HBB was widely used as an additive FR, in contrast to the reduced applications at present . No time trends were observed for TBB or TBPH (Figure h,i), which is consistent with the absence of trends for the two AHFRs in cetaceans from Hong Kong waters during 2003–2012 .…”

“…Similar descending trends were documented in striped dolphins from the Mediterranean Sea collected between 1990 and 2018, as well as in St. Lawrence Estuary belugas from 1997 to 2013. 56,60 Historically, HBB was widely used as an additive FR, in contrast to the reduced applications at present. 2 No time trends were observed for TBB or TBPH (Figure 3h,i), which is consistent with the absence of trends for the two AHFRs in cetaceans from Hong Kong waters during 2003−2012.…”

Nontarget Screening of Organohalogen Compounds in the Liver of Wild Birds from Osaka, Japan: Specific Accumulation of Highly Chlorinated POP Homologues in Raptors

“…Their mass spectra had a similar profile to those of PCBs, with an intense molecular ion cluster (M + ) and its subsequent dechlorinated fragments (Figure S21). Although not routinely monitored, PCTs are known to have been produced industrially for the same application as PCBs in several countries including Japan and PCTs with up to 9 Cl were still found recently in marine species by a few studies using both target and nontarget analysis. , Environmental occurrence of PCTs with up to 11 Cl have been reported in a study on river sediment from Japan, however it was not possible to confirm the accumulation of Cl 10 - and Cl 11 -terphenyls in the bird livers, as the oven temperature for GC×GC during acquisition was probably not sufficiently high for their elution from the columns.…”

Spatiotemporal Trends of Legacy and Alternative Flame Retardants in Harbor Seals from the Coasts of California, the Gulf of Maine, and Sweden

“…43 The production history of HBBZ in Europe is not clear, but a European study also reported a drastic decline of HBBZ levels in striped dolphin (Stenella coeruleoalba) from the Mediterranean Sea. 44 However, HBBZ can also be derived from thermal decomposition of commercial octa-and deca-BDE mixtures, 45 which may partially explain the lack of decline in Maine seals during 1999−2010 considering the high consumption of BDE 209 in North America throughout the first decade of the 2000s. 5 A relatively shorter period of sampling may also likely contribute to the absence of significant trends in the Maine population.…”