Sediment cores of known chronology from Richardson and San Pablo Bays in San Francisco Bay. CA, were analyzed for a suite of chlorinated hydrocarbon pesticides and polychlorinated biphenyls to reconstruct a historic record of inputs. Total DDTs (DDT = 2,4'and 4,4'-dichlorodiphenylmchloroethane and the metabolites, 2.4'and 4,4'-DDE, -DDD) range in concentration from 4-21 ng/g and constitute a ma...

mangrove sediments were collected during wet and dry seasons from nine stations in khamir,laft and natural reservoir mangrove-dense areas of hormozgan province in the south of iran. σ pcbs ranged from 5.33 to 15.5 ng/g dry weight and the dominant congener was no.153. average σ ddts for khamir and laft mangroves were 16.58 ± 1.51 and 18.8 ± 9.98 ng/g dry weight. ddt was more abundant than dde an...

conclusions in conclusion, toxicological studies showed that, although contamination level in caspian sea fishes was relatively low, the present status might pose a risk about food chain contamination. results the review showed that nine studies were recorded in databases about pesticide residues in caspian sea fish tissues. these studies reported that there is limited evidence of organochlorin...

Among killer whale forms, type C is a fish-eating form and the most common in Ross Sea. In austral summer 2015, study was conducted to evaluate toxicological hazard these marine mammals face Antarctic ecosystem. Seven biopsy samples were collected from adult individuals (five males two females) surroundings of Italian Research Station Mario Zucchelli, Terra Nova Bay, by remote dart sampling pac...

Between 2019 and 2021, 21 bottlenose dolphins were found stranded dead along the Ligurian Pelagos Sanctuary coast (Italy). For 11 animals, out of a total 14 recovered, cause death was classified as natural, anthropic, or not determined based on gross histological pathology ancillary testing. Hexachlorobenzene (HCB), dichlorodiphenyltrichloroethanes (DDTs), polychlorinated biphenyls (PCBs) exami...

In this study, we evaluate the long-term and seasonal variations of polychlorinated biphenyls (PCBs), hexachlorobenzene (HCB), α-, γ-hexachlorocyclohexanes (HCH), p,p′-dichlorodiphenyltrichloroethane (p,p′-DDT) its metabolites through a passive air sampling method at two (urban suburban) stations in Eastern Siberia, Russia, 2011–2017. The median levels HCB, ∑HCHs, ∑DDTs, ∑PCB39, ∑PCB6 were 116,...

Factors related to mortality and disease in Indo-Pacific humpback dolphins (Sousa chinensis) from Hong Kong waters were investigated by detailed examination of dolphin specimens found stranded 1995-2004. In total, 86 necropsied, but many these too badly decomposed provide much information. Skin blubber biopsies also collected six identified living individuals concentrations organochlorines (DDT...

The River Elbe is responsible for influxes of contaminants into the Wadden Sea World Heritage Site. We investigated levels of polychlorinated biphenyls (PCBs), oxychlordane (OxC), hexachlorobenzene (HCB), hexachlorocyclohexanes (α-, β-, γ-HCHs), dichlorodiphenyltrichloroethane (DDT) and its metabolites, and polybrominated diphenyl ethers (PBDEs) in blood and feathers from Eurasian oystercatcher...