Branchial ion fluxes and toxicant extraction efficiency in lamprey (Petromyzon marinus) exposed to methylmercury

Stinson, Colleen; Mallatt, Jon

doi:10.1016/0166-445x(89)90038-6

Cited by 15 publications

(4 citation statements)

References 38 publications

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“…We hypothesize that the most probable explanation for this discrepancy relates to differences in Hg exposure conditions between the two studies. Exposure to dissolved inorganic Hg disrupts gill epithelium, potentially affecting gas exchange and permeability of cell membranes to cations [18,23,24]. Such disruptions may result in compensatory changes in ventilation frequency, increased energy demands, or altered gas exchange efficiency, possibly resulting in the increase in metabolic rate observed by Tatara et al [5].…”

Section: Discussionmentioning

confidence: 99%

Relationships between mercury body concentrations, standard metabolic rate, and body mass in eastern mosquitofish (Gambusia holbrooki) from three experimental populations

Hopkins

Tatara

Brant

et al. 2003

Enviro Toxic and Chemistry

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Eastern mosquitofish (Gambusia holbrooki) were sampled from three experimental populations (two Hg-exposed populations and one reference population) to determine whether transgenerational exposure (lifelong exposure of multiple generations) to Hg adversely affects standard metabolic rate (SMR). Mosquitofish subjected to lifelong Hg exposure accumulated significant concentrations of Hg in their tissues compared to fish from the reference population (mean: 3.89-4.13 vs 0.08 microHg/g wet mass, respectively). Less than 10% of the variability in Hg tissue concentrations could be explained by fish body mass, likely because of the short life span and/or dietary habits of this species. Despite the high body burdens of Hg in exposed fish, we found no significant difference in SMR among individuals from Hg-exposed or reference populations. Our findings contrast recent laboratory work describing elevated SMR in mosquitofish exposed to 100 microg/L dissolved inorganic Hg for 48 h. To account for contrasting results between studies, we hypothesize that acute exposure to dissolved inorganic Hg damages gill epithelium, resulting in increased metabolic rate, but that lifelong Hg exposure via trophic uptake of methyl mercury does not affect fish respiratory structures. Alternative hypotheses include the possibility that G. holbrooki is a species that can tolerate high body burdens of Hg or that more than four years of genetic isolation during Hg exposure (8-12 generations) resulted in selection for Hg-tolerant or -resistant individuals.

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Section: Discussionmentioning

confidence: 99%

Relationships between mercury body concentrations, standard metabolic rate, and body mass in eastern mosquitofish (Gambusia holbrooki) from three experimental populations

Hopkins

Tatara

Brant

et al. 2003

Enviro Toxic and Chemistry

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“…Lock et al (1981) suggested that mercury caused osmoregulatory effects primarily by increasing gill permeability to water. Stinson and Mallatt (1989) reported increased permeability of the gills in lamprey in response to mercury poisoning.…”

Section: Discussionmentioning

confidence: 99%

Effect of Inorganic Mercury on Hematological and Antioxidant Parameters on Olive Flounder Paralichthys olivaceus

Kim¹,

Lee²,

Kang³

2012

Fisheries and aquatic sciences

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The effects of inorganic mercury on hematological parameters and hepatic oxidative stress enzyme activity were studied in olive flounder Paralichthys olivaceus. Fish were injected twice intraperitoneally with mercuric chloride (2, 4, or 8 mg Hg/kg BW). The major hematological findings were significant decreases in the red blood cell count, hematocrit value, and hemoglobin level in olive flounder exposed to 8 mg Hg/kg BW. Remarkably low levels of calcium and chloride, and reduced osmolality, were also observed at 8 mg Hg/kg BW. In hepatic tissue, significant increases in glutathione peroxidase and catalase activity were observed above 4 mg Hg/kg BW Inorganic mercury also increased glutathione S-transferase and glutathione reductase activity at 8 mg Hg/ kg BW in hepatic tissue. The present findings suggest that exposure to a low concentration (≥4 mg Hg/kg BW) of inorganic mercury can cause significant changes in hematological and antioxidant parameters.

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“…Relatively few studies, however, have examined whether these levels of contaminants are harmful to lampreys (e.g., Mallatt et al 1986;Stinson and Mallatt 1989;Andersen et al 2010). Many of the above-mentioned studies were conducted to determine whether human consumption of lampreys is safe; based on mercury and persistent organic pollutant levels, they generally are not (MacEachen et al 2000;Soimasuo et al 2004;Isosaari et al 2006; but see Merivirta et al 2001).…”

Section: Pollutionmentioning

confidence: 99%

Lampreys: Biology, Conservation and Control

Docker¹

2015

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Branchial ion fluxes and toxicant extraction efficiency in lamprey (Petromyzon marinus) exposed to methylmercury

Cited by 15 publications

References 38 publications

Relationships between mercury body concentrations, standard metabolic rate, and body mass in eastern mosquitofish (Gambusia holbrooki) from three experimental populations

Relationships between mercury body concentrations, standard metabolic rate, and body mass in eastern mosquitofish (Gambusia holbrooki) from three experimental populations

Effect of Inorganic Mercury on Hematological and Antioxidant Parameters on Olive Flounder Paralichthys olivaceus

Lampreys: Biology, Conservation and Control

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