Correlation and toxicological inference of trace elements in tissues from stranded and free-ranging bottlenose dolphins (Tursiops truncatus)

Stavros, Hui-Chen W.; Stolen, Megan; Durden, Wendy Noke; McFee, Wayne E.; Bossart, Gregory D.; Fair, Patricia A.

doi:10.1016/j.chemosphere.2010.11.019

Cited by 55 publications

(47 citation statements)

References 69 publications

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“…In our study, As concentrations were within the range of values reported for various stranded marine mammals. For instance, California sea lions from southern California (Harper et al, 2007) and bottlenose dolphins from south Carolina and Florida waters (Stavros et al, 2011). The bottlenose dolphins from this latter study also exhibited same range of V levels in their livers compared to porpoises stranded in our study.…”

Section: Non Essential Elementssupporting

confidence: 61%

“…Moreover, the present hepatic V levels were in the same order of magnitude compared to those reported in other marine mammals such as, Beluga whales (Mackey et al, 1996), various pinnipeds (Saeki et al, 1999) and Caspian seals (Anan et al, 2002). An increase in the concentrations of V with age has been reported in several species of marine mammals and in addition V levels were correlated with Hg levels in the liver (Mackey et al, 1996;Saeki et al, 1999;Anan et al, 2002;Ikemoto et al, 2004;Stavros et al, 2011). Similarly, adult porpoises showed significant higher levels of V in livers compared to juveniles and a significant correlation was found between hepatic V and Hg accumulation (Table 2).…”

Section: Non Essential Elementsmentioning

confidence: 61%

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Harbour porpoises (Phocoena phocoena) stranded along the southern North Sea: An assessment through metallic contamination

Mahfouz

Henry

Courcot

et al. 2014

Environmental Research

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a b s t r a c tThroughout the last few years, the southern North Sea has witnessed an increase in the number of stranded marine mammals, particularly the harbour porpoise (Phocoena phocoena). This species is subject to several potential threats such as exposure to contaminants, changes in food supply, marine traffic and fishery by-catch. The aims of this study were to investigate potential associations between contaminants and health status and to analyze spatial and temporal trends of metal concentrations in harbour porpoises. Selected trace elements (As, Cd, Cr, Cu, Hg, Mn, Se, V and Zn) were measured in kidneys and livers of 105 harbour porpoises stranded along the southern North Sea (French and Belgian coasts from 2006 to 2013) and 27 stranded along the Bay of Biscay (French coast from 2009 to 2012). Porpoises that died from infectious disease displayed significant higher hepatic concentrations of Cd, Hg, Se and Zn compared to healthy porpoises that died from physical trauma. Adult porpoises displayed significant higher concentrations of Cd, Cr, Hg, Se and V in livers compared to juveniles. No spatial or temporal trends in metal concentrations were detected in our study. The results of the present study suggested that chemical contamination may represent one of many threats encountered by harbour porpoises, but it cannot explain alone the increase in the number of stranded individuals.

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Section: Non Essential Elementssupporting

confidence: 61%

Section: Non Essential Elementsmentioning

confidence: 61%

Harbour porpoises (Phocoena phocoena) stranded along the southern North Sea: An assessment through metallic contamination

Mahfouz

Henry

Courcot

et al. 2014

Environmental Research

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“…7. Review of mean T-Hg concentrations (mg kg À1 dw) in skin of bottlenose dolphins from Florida from the literature (Woshner et al, 2008;Stavros et al, 2011) and the present study (blue lines). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)…”

Section: T-hgmentioning

confidence: 99%

Spatial variation in the accumulation of POPs and mercury in bottlenose dolphins of the Lower Florida Keys and the coastal Everglades (South Florida)

Kiszka

Heithaus

Scholl

et al. 2017

Environmental Pollution

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a b s t r a c tThe bottlenose dolphin (Tursiops truncatus) is an upper trophic level predator and the most common cetacean species found in nearshore waters of southern Florida, including the Lower Florida Keys (LFK) and the Florida Coastal Everglades (FCE). The objective of this study was to assess contamination levels of total mercury (T-Hg) in skin and persistent organic pollutants (PCBs, PBDEs, DDXs, HCHs, HCB, S PCDD/Fs and S DL-PCBs) in blubber samples of bottlenose dolphins from LFK (n ¼ 27) and FCE (n ¼ 24). PCBs were the major class of compounds found in bottlenose dolphin blubber and were higher in individuals from LFK (S 6 PCBs LFK males: 13,421 ± 7730 ng g À1 lipids, S 6 PCBs LFK females: 9683 ± 19,007 ng g À1 lipids)than from FCE (S 6 PCBs FCE males: 5638 ng g À1 ± 3627 lipids, S 6 PCBs FCE females: 1427 ± 908 ng g À1 lipids). These levels were lower than previously published data from the southeastern USA. The S DLPCBs were the most prevalent pollutants of dioxin and dioxin like compounds (S DL-PCBs LFK: 739 ng g À1 lipids, S DL-PCBs FCE: 183 ng g À1 lipids) since PCDD/F concentrations were low for both locations (mean 0.1 ng g À1 lipids for LFK and FCE dolphins). The toxicity equivalences of PCDD/Fs and DLPCBs expressed as TEQ in LFK and FCE dolphins is mainly expressed by DL-PCBs (81% LFK -65% FCE). T-Hg concentrations in skin were significantly higher in FCE (FCE median 9314 ng g À1 dw) compared to LFK dolphins (LFK median 2941 ng g À1 dw). These concentrations are the highest recorded in bottlenose dolphins in the southeastern USA, and may be explained, at least partially, by the biogeochemistry of the Everglades and mangrove sedimentary habitats that create favourable conditions for the retention of mercury and make it available at high concentrations for aquatic predators.

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“…These concentrations significantly exceeded those in dolphins from CHS (Stavros et al 2007(Stavros et al , 2008 and are among the highest recorded worldwide . Similarly, the concentrations of THg in the liver of stranded IRL dolphins were approximately 10 times higher than those in dolphins stranded near CHS and were significantly correlated with skin concentrations (Stavros et al 2011).…”

Section: Mercurymentioning

confidence: 94%

Health and Environmental Risk Assessment Project for bottlenose dolphins Tursiops truncatus from the southeastern USA. II. Environmental aspects

Reif

Schaefer²,

Bossart³

et al. 2017

Dis. Aquat. Org.

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Correlation and toxicological inference of trace elements in tissues from stranded and free-ranging bottlenose dolphins (Tursiops truncatus)

Cited by 55 publications

References 69 publications

Harbour porpoises (Phocoena phocoena) stranded along the southern North Sea: An assessment through metallic contamination

Harbour porpoises (Phocoena phocoena) stranded along the southern North Sea: An assessment through metallic contamination

Spatial variation in the accumulation of POPs and mercury in bottlenose dolphins of the Lower Florida Keys and the coastal Everglades (South Florida)

Health and Environmental Risk Assessment Project for bottlenose dolphins Tursiops truncatus from the southeastern USA. II. Environmental aspects

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