Possible chemical causes of skeletal deformities in grey heron nestlings (Ardea cinerea) in North Nottinghamshire, UK

Thompson, Helen; Fernandes, A.A.; Rose, Martin; White, Shaun; Blackburn, Adrian

doi:10.1016/j.chemosphere.2006.02.007

Cited by 27 publications

(18 citation statements)

References 50 publications

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“…This would suggest potential for individual GBH nestlings to exhibit the bone abnormalities observed in grey heron nestlings [43]. This difference in apparent sensitivity may be attributable to sitespecific differences in the environmental mixture of PCDD/DFs and dioxin-like PCBs present in each study area.…”

Section: Risk Characterizationmentioning

confidence: 97%

“…Beyond egg and blood plasma data, one additional study was available for comparison of other tissue concentrations. A group of grey heron nestlings in the United Kingdom that were found to have bone abnormalities had adipose concentrations of 640 ng total TEQ WHO-Avian /kg wet weight (LOAEC NS-ADIPOSE ) compared with the group with no observed deformities, which had a mean adipose concentration of 300 ng total TEQ WHO-Avian /kg wet weight (NOAEC NS-ADIPOSE ) [43]. These TEQ were primarily from dioxin-like PCBs.…”

Section: Selection Of Toxicity Reference Valuesmentioning

confidence: 98%

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Tissue‐based risk assessment of great blue heron (Ardea herodias) exposed to PCDD/DF in the Tittabawassee River floodplain, Michigan, USA

Seston

Fredricks

Tazelaar

et al. 2010

Enviro Toxic and Chemistry

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Concentrations of dioxin-like compounds, primarily polychlorinated dibenzofurans (PCDFs), in soils and sediments of the Tittabawassee River (TR) and associated floodplains downstream of Midland, Michigan, USA, were greater than upstream sites and prompted a site-specific risk assessment of great blue herons (GBH). Tissue exposure of PCDF and polychlorinated dibenzo-p-dioxins (PCDDs) was assessed in multiple GBH tissue types, including blood plasma of adults and eggs, as well as blood plasma, adipose, liver, and muscle of nestlings. Adult GBH exposure was associated with foraging area and age class, with concentrations of PCDD/DF being greater in blood plasma of adult GBH foraging in the TR compared with those foraging in upstream reference areas and in older birds as compared with their younger cohorts. Concentrations of PCDD/DFs and dioxin-like polychlorinated biphenyls (PCBs) in eggs and nestling tissues of GBH collected from rookeries within the TR floodplain were generally similar among rookeries. Mean concentrations of PCDD/DFs in eggs of GBH ranged from 45 to 67 ng/kg, wet weight for the rookeries studied, with a maximum concentration of 210 ng/kg, wet weight observed. Adipose consistently had the greatest concentration of PCDD/DFs of all tissues collected from nestlings of GBH, ranging from 98 to 430 ng/kg, wet weight. Potential for adverse population-level effects from site-specific contaminant exposures were evaluated by comparison with selected toxicity reference values (TRVs). Minimal risk of adverse population-level effects were predicted when exposures measured in tissues of GBH collected from rookeries within the TR were compared with appropriate TRVs. This prediction is consistent with site-specific measures of population condition, which included clutch size and number of nestlings per successful nest.

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Section: Risk Characterizationmentioning

confidence: 97%

Section: Selection Of Toxicity Reference Valuesmentioning

confidence: 98%

Tissue‐based risk assessment of great blue heron (Ardea herodias) exposed to PCDD/DF in the Tittabawassee River floodplain, Michigan, USA

Seston

Fredricks

Tazelaar

et al. 2010

Enviro Toxic and Chemistry

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“…No cause was determined but necropsy of all specimens suggested that the gizzards of Besthorpe herons were less likely to contain bone remains. The only study for organochlorines (OC) in GHUK birds from Besthorpe Reserve found significant levels of polychlorinated biphenyls, polychlorinated dibenzo-pdioxins and polychlorinated dibenzofurans (Thompson et al, 2006).…”

Section: Grey Herons United Kingdom (Ghuk)mentioning

confidence: 99%

Environmental factors associated with nutritional secondary hyperparathyroidism in wild birds

Tangredi¹

2007

Avian & Poul. Biolog. Rev.

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Six published case reports of nutritional secondary hyperparathyroidism are described occurring in different species of juvenile wild birds worldwide. Gross skeletal deformities are characterised by fractures and curvature of the long bones and beak resulting from an altered calciumyphosphorus ratio in the blood. The histopathologic diagnosis is osteodystrophia fibrosa and parathyroid gland hyperplasia. Deficiency of vitamin D is implicated in the two instances in which this was measured. Environmental factors include: decreased biodiversity of food sources, surface water pollution, seasonal conditions affecting food and exposure to UV light, and sub-lethal exposure to xenobiotics. Evidence is presented on the possible role of xenobiotics in the pathogenesis.

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“…PCB exposure in herons has been associated with: increased cytochrome P450 monooxygenase activity Levengood et al, 2007); reduced embryonic weight (Hoffman et al, 1986), reduced plasma retinol concentrations (Champoux et al, 2006), and, in combination with DDE, decreased nest attentiveness (Thomas and Anthony, 2003). PCBs also contribute, along with dioxins, to skeletal deformities (Thompson et al, 2006) and other manifestations of embryotoxity (Hoffman et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

Comparison of PCB congener profiles in the embryos and principal prey of a breeding colony of black-crowned night-herons

Levengood

Schaeffer

2010

Journal of Great Lakes Research

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Possible chemical causes of skeletal deformities in grey heron nestlings (Ardea cinerea) in North Nottinghamshire, UK

Cited by 27 publications

References 50 publications

Tissue‐based risk assessment of great blue heron (Ardea herodias) exposed to PCDD/DF in the Tittabawassee River floodplain, Michigan, USA

Tissue‐based risk assessment of great blue heron (Ardea herodias) exposed to PCDD/DF in the Tittabawassee River floodplain, Michigan, USA

Environmental factors associated with nutritional secondary hyperparathyroidism in wild birds

Comparison of PCB congener profiles in the embryos and principal prey of a breeding colony of black-crowned night-herons

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