Investigation of the Hepatic Mixed-Function Oxidase System in Herring Gull Embryos in Relation to Environmental Contaminants

Boersma, Dora C.; Ellenton, Jennifer A.; Yagminas, Al

doi:10.1897/1552-8618(1986)5[309:iothmo]2.0.co;2

Cited by 15 publications

(30 citation statements)

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“…The injection of Herring Gull eggs with this maximum level, 5/~g g-1 mirex, failed to cause mortality and embryonic liver enzyme activities were not consistently altered (Boersma et al 1986). Interspecific differences in sensitivity notwithstanding, mirex levels in the present study are probably well below the threshold for effects on egg retinoids.…”

Section: Resultsmentioning

confidence: 98%

“…Mean concentrations of mirex in the heron eggs varied from 0.012 to 0.14/~g g-1 (Table 2). Egg mirex levels have typically ranged from 0.1 to a maximum of approximately 5.0/~g g-1 in Great Lakes gull colonies (Gillman et al 1977(Gillman et al , 1979Mineau et al 1984;Ellenton et al 1985;Boersma et al 1986). …”

Section: Resultsmentioning

confidence: 99%

“…Equally possible are spurious correlations between a given contaminant and egg retinoids attributable to the intercorrelation of contaminants which has been observed previously by many authors (c.f. Laporte 1982;Boersma et al 1986). …”

Section: Resultsmentioning

confidence: 99%

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β-carotene and retinoids in eggs of Great Blue Herons (Ardea herodias) in relation to St Lawrence River contamination

Boily

Champoux²,

Bourbonnais

et al. 1994

Ecotoxicology

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: The potential use of retinoids and β-carotene as biomarkers in the eggs of the Great Blue Heron was investigated. In the spring of 1991, 65 eggs were collected from nine heronries (seven along the St Lawrence River and two reference sites). A method was specifically developed for the extraction and analysis of β-carotene and the retinoids in heron egg yolks by reversed-phase HPLC. When results were expressed either as the molar ratio of retinol: retinyl palmitate or as retinyl palmitate concentration, significant differences were found between colonies; however, retinyl palmitate concentration was deemed the better biomarker because it was not significantly influenced by embryonic stage of development. Retinyl palmitate concentrations in freshwater colonies were negatively related to PCB congeners Nos 105 and 118 as well as their TCDD-EQ values (p < 0.02, r (2)=0.78). Egg tetrachloro-mono-ortho biphenyl concentrations were also negatively related to retinyl palmitate (p < 0.005, r (2)=0.90). With the exception of the two mono-ortho co-planar congeners detected in the present study, the contamination levels found in heron eggs were well below those found for other bird species in the Great Lakes area and, so far, no detrimental effects have been reported in Great Blue Heron populations in Quebec. These results suggest that retinyl palmitate may be useful as a sensitive and non-invasive biomarker for monitoring organochlorine contaminant effects in the Great Blue Heron in freshwater sites.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

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β-carotene and retinoids in eggs of Great Blue Herons (Ardea herodias) in relation to St Lawrence River contamination

Boily

Champoux²,

Bourbonnais

et al. 1994

Ecotoxicology

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“…Levels of organochlorine compounds in prairie falcon eggs collected in California between 1989 and Levels are reported as mgkg-1 of the wet weight at 1500 µgkg -1 (assuming 80% water in the eggs). Boersma et al (1986) in an egg injection study found a dramatic increase of embryo mortality with increasing dose of HCB in herring gulls (Larus argentatus), and calculated the LD50 to be 4300 µgkg -1 . At a concentration of 1500 µgkg -1 (twice that of the mean value found in this study), Boersma et al (1986) found a mortality rate in the herring gull embryos of 21% .…”

Section: Resultsmentioning

confidence: 99%

High Levels of HCB and DDE Associated with Reproductive Failure in Prairie Falcons ( Falco mexicanus ) from California

Jarman

Burns

Bacon

et al. 1996

Bulletin of Environmental Contamination and Toxicology

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“…DDT may also have impaired reproductive success in a wide range of fish, birds and mammals. PCBs, and possibly mirex in combination with other contaminants, have been widely implicated in birth defects and reproductive failures in several species of aquatic birds and mammals (Boersma et al, 1986;Eisler, 1985;Eisler & Jacknow, 1985;. Certain PCB congeners (expressed in dioxin equivalents) have also been implicated in the failure of lake trout, stocked in Lake Ontario, to achieve natural reproduction.…”

Section: Summary Of Principal Stress Effectsmentioning

confidence: 99%

The effects of land use and cultural development on the Lake Ontario ecosystem since 1750

Sly¹

1991

Hydrobiologia

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Lake Ontario is the lowest in the chain of live Great Lakes which form part of the boundary between Canada and the United States. Although European exploration began as early as 1615, it was not until the mid-18th Century that permanent settlement began in the Great Lakes basin. Construction of the Erie Canal which links Buffalo with New York via the Hudson River, and its branch to Oswego, strengthened ties between settlements around the lower Great Lakes (lakes Erie and Ontario) and rapidly growing populations along the Atlantic seaboard. The coming of railroads greatly expanded these ties, and provided a direct link between Canadian settlements and the port of Montreal. Over the past 200 years, successive waves of immigrants entered the region, particularly from Europe.Cultural development has resulted in a wide range of environmental impacts throughout the Great Lakes basin. Impacts have been particularly severe in Lake Ontario. Major changes in water quality and the structure of biological communities have resulted from forest clearance, agricultural expansion, intensive fishing, industrial and urban development, and lake level control. Introductions of exotic species, inputs of nutrient and toxic contaminants, and the effects of climatic variation and modification of microclimates have all interacted such that it is often impossible to establish singular cause and effect.

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Investigation of the Hepatic Mixed-Function Oxidase System in Herring Gull Embryos in Relation to Environmental Contaminants

Cited by 15 publications

References 0 publications

β-carotene and retinoids in eggs of Great Blue Herons (Ardea herodias) in relation to St Lawrence River contamination

β-carotene and retinoids in eggs of Great Blue Herons (Ardea herodias) in relation to St Lawrence River contamination

High Levels of HCB and DDE Associated with Reproductive Failure in Prairie Falcons ( Falco mexicanus ) from California

The effects of land use and cultural development on the Lake Ontario ecosystem since 1750

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