Transfer of mercury and phenol derivatives across the placenta of Baltic grey seals (Halichoerus grypus grypus)

Nehring, Iga; Grajewska, Agnieszka; Falkowska, Lucyna; Staniszewska, Marta; Pawliczka, Iwona; Saniewska, Dominika

doi:10.1016/j.envpol.2017.08.094

Cited by 17 publications

(7 citation statements)

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“…Generally, maternal transfer of lipophilic contaminants mainly occurs both in the fetal phase via the placenta and in lactation via breast milk. The study on seal placenta indicated that the placenta acted as a barrier against the maternal–fetal transmission of phenol derivatives, including BPs. The barrier was likely to be incomplete, resulting in penetration of about 27% of BPA through the placenta .…”

Section: Resultsmentioning

confidence: 99%

Cross-Generational Impacts of Diet Shift on Bisphenol Analogue Loads in Indo-Pacific Humpback Dolphins (Sousa chinensis)

Guo

Zhang

et al. 2022

Environ. Sci. Technol.

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Bisphenol analogues (BPs) are ubiquitous pollutants to marine organisms as endocrine disruptive chemicals. However, the residue contamination and the trophic transfer of BPs in the apex predator nearshore dolphins are poorly studied. Here, we measured the concentrations of six BPs, including bisphenol A (BPA), bisphenol AF (BPAF), bisphenol B (BPB), bisphenol F (BPF), bisphenol P (BPP), and bisphenol S (BPS) in the liver of Indo-Pacific humpback dolphin (Sousa chinensis) (n = 75) collected from the Pearl River Estuary during a period with significant dietary changes (2004−2020). BPA and BPAF were the dominant components of the residue ∑BPs in the liver, with a proportion of 80%. Sex, maturity, and stranding location had no significant effects on BP levels. The generalized additive models indicated that BPA levels in juveniles and adults decreased from 2004 to 2013 while increasing from 2013 to 2020. The temporal trend of BPA levels was likely driven by the shift of the dominant diet from Harpadon nehereus to Thryssa spp. The concurrent increase of BPA loads in calves and juveniles and adults over the recent decades suggested that the diet-mediated variations of maternal BPA levels could be redistributed to their offspring.

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Section: Resultsmentioning

confidence: 99%

Cross-Generational Impacts of Diet Shift on Bisphenol Analogue Loads in Indo-Pacific Humpback Dolphins (Sousa chinensis)

Guo

Zhang

et al. 2022

Environ. Sci. Technol.

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“…ZHSC65 (202 ng g –1 dw, maternal) and ZHSC66 (61.4 ng g –1 dw, fetal) as well as ZHSC70 (362 ng g –1 dw, maternal) and ZHSC69 (83.5 ng g –1 dw, fetal) were identified as two mother–fetus pairs. Despite the small sample size, there was a positive correlation between the AP loads in the paired mother–fetus, suggesting a potential maternal transfer of APs. , Maternal exposure of offspring to pollution during gestation and lactation produces adverse effects on growth and development that persist throughout the exposure period. , The AP loads of IPHD calves showed a significantly decreasing trend between 2009 and 2020 (Figure E, R adj 2 = 0.24, p = 0.045). Therefore, the recent lower level of maternal–fetal transmission of APs may benefit the development of newborn dolphins.…”

Section: Resultsmentioning

confidence: 92%

“…A total of 110 cetacean carcasses were collected from the SCS coastline between 2004 and 2021 (Figure 1, Table S1), including 71 S2). The stranding time and location, body length, sex, and degree of decomposition were recorded by the examination of postmortem specimens (Table S1).…”

Section: Sample Collectionmentioning

confidence: 99%

Cetaceans as Bioindicators to Assess Alkylphenol Exposure and Hormone-Disrupting Effects in the South China Sea

Guo

Sun

Shi

et al. 2023

Environ. Sci. Technol.

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Alkylphenols (APs) represent one of the highest exposure levels among endocrine disrupting chemicals (EDCs) in the South China Sea (SCS) due to their extensive use as plastic additives. The concerns about EDCs, including APs, have been reiterated since the surge in plastic waste from the COVID-19 response, but far less is known about the response of AP loadings in the SCS to emerging public policies and activities, including the COVID-19 pandemic. Here, we used cetaceans as bioindicators for monitoring two major APs, 4-nonylphenol (4-NP) and 4tert-octylphenol (4-t-OP), in nine stranded cetacean species (n = 110) in the SCS between 2004 and 2021. Prior to the COVID-19, APs loads showed decreasing temporal trends for finless porpoises and humpback dolphins, most likely due to China's restrictions on AP use or a shift in dominant prey species. Unexpectedly, AP loads continued to decline after the COVID-19 outbreak, probably due to a temporal-lag response of marine AP fluxes to the pandemic. The health risk assessments based on hormone biomarkers and toxicity thresholds suggest the potential adverse effects of APs on cetaceans, while recent declines in APs, though limited, may mitigate the detrimental impacts.

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“…The oldest female (1) was found off the coast of Sweden as a pup. The other 3 females (2, 3, 4) come from the Estonian island of Allirahu, where after 3 weeks of being nursed by their mothers, they were caught and transported to the Hel Marine Station where they have stayed since 1998 (see Nehring et al 2017 , for more details). Up to 4 seal pups are born every year at the MSIOUG.…”

Section: Methodsmentioning

confidence: 99%

137Cs and 40K in gray seals Halichoerus grypus in the southern Baltic Sea

Saniewski

Zalewska

Suplińska

et al. 2019

Environ Sci Pollut Res

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This study presents levels of 137 Cs and 40 K concentrations in the placentas of seals gathered in the period 2007–2015. The mean activity of 137 Cs and 40 K was 5.49 Bq kg −1 w.w. and 136.6 Bq kg −1 ww respectively. Statistically significant correlation was observed between the 137 Cs activities in placenta and in herring—the staple food for seals. The concentrations of 137 Cs and 40 K were also determined in other tissues (muscle, liver, lung, and brain) of wild seals. The concentrations of 137 Cs were from 2.59 Bq −1 ww (lungs) to 24.3 Bq kg −1 ww (muscles). The transfer factor values for 137 Cs (seal tissue/fish) ranged from 0.89 to 2.42 in the case of the placentas and from 1.35 to 8.17 in the case of the muscle. For adults seal, the effective dose from 137 Cs was 2.98 nGy h −1 . The mean external radiation dose to pup was 0.77 nGy h −1 from 137 Cs and 6.69 nGy h −1 from 40 K.

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Transfer of mercury and phenol derivatives across the placenta of Baltic grey seals (Halichoerus grypus grypus)

Cited by 17 publications

References 50 publications

Cross-Generational Impacts of Diet Shift on Bisphenol Analogue Loads in Indo-Pacific Humpback Dolphins (Sousa chinensis)

Cross-Generational Impacts of Diet Shift on Bisphenol Analogue Loads in Indo-Pacific Humpback Dolphins (Sousa chinensis)

Cetaceans as Bioindicators to Assess Alkylphenol Exposure and Hormone-Disrupting Effects in the South China Sea

137Cs and 40K in gray seals Halichoerus grypus in the southern Baltic Sea

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