Association between cadmium and calcium uptake and distribution during the moult cycle of female shore crabs, Carcinus maenas: an in vivo study

Bondgaard, Morten; Bjerregaard, Poul

doi:10.1016/j.aquatox.2004.11.017

Cited by 53 publications

(26 citation statements)

References 50 publications

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“…However, in the estuarine grass shrimp, Palaemonetes pugio, molting did not substantially reduce the amounts of copper, zinc, and cadmium, because they were reabsorbed with the calcium during proecdysis (Keteles and Fleeger, 2001). Bondgaard and Bjerregaard (2005) found that molting of the crab C. maenas did not reduce cadmium levels. Molting played a role in metal concentrations and their distributions in soft tissues and the exoskeleton in amphipods (Weeks et al, 1992).…”

Section: Introductionmentioning

confidence: 95%

Molting as a mechanism of depuration of metals in the fiddler crab, Uca pugnax

Bergey

Weis

2007

Marine Environmental Research

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Metal distributions in the exoskeleton and soft tissues of the fiddler crab, Uca pugnax, were examined during intermolt and immediate postmolt to determine if distribution of the metals changed prior to molting and to determine if molting is a feasible mechanism to depurate metals. Fiddler crabs were collected from two locations in New Jersey, a highly contaminated site and a relatively clean environment. The crabs from the contaminated site had higher concentrations of metals in their soft tissues for Cu, significantly higher concentrations of Pb in their soft tissues and carapace, but did not have any significant differences in concentrations of Zn in comparison to their conspecifics from the relatively clean site during intermolt. Crabs from the contaminated site has significantly higher levels of Cu, Pb, and Zn in both their soft tissues and exuvia immediately after molting. Crabs from both sites shifted copper and zinc from the carapace into the soft tissues prior to molting. Lead distribution shifted from the soft tissues to the exoskeleton prior to molting in the population from the contaminated site but shifted from the exoskeleton into the soft tissues for the relatively clean site. Average percent of the total body burden eliminated during the molting process for the highly contaminated site varied with each metal, 12% Cu, 76% Pb, and 22% Zn. Average percent of the total body burden eliminated during molting process for the relatively clean site also varied with each metal and was significantly lower than the conspecifics from the contaminated site, 3% Cu, 56% Pb, and 8% Zn. Molting can reduce overall body burdens significantly and is a feasible mechanism to depurate lead.

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Section: Introductionmentioning

confidence: 95%

Molting as a mechanism of depuration of metals in the fiddler crab, Uca pugnax

Bergey

Weis

2007

Marine Environmental Research

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“…These are chemicals that have the ability to modulate the endocrine systems of animals and therefore have the potential to affect various physiological processes adversely. Natural and synthetic steroid hormones and heavy metals are environmental contaminants recognised as EDCs, most frequently encountered in aquatic ecosystems (Medesani et al 2004;Bondegaard and Bjerregaard 2005;Rodríguez et al 2007). In addition, other recognised EDCs include alkylphenols, polychlorinated biphenyls (PCBs), chlorinated pesticides, herbicides and petroleum hydrocarbons (Pojana et al 2007;Rodríguez et al 2007;Swart and Pool 2007;McKinlay et al 2008).…”

mentioning

confidence: 99%

Steroid hormone concentrations and physiological toxicity of water from selected dams in Namibia

Faul

Julies

Pool

2014

African Journal of Aquatic Science

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Namibia is a semi-arid to arid country and has most of its surface water in dams built on ephemeral rivers. Whilst water quality is often measured in terms of bacterial contamination and general physico-chemical characteristics, this study extends water quality assessment to include steroid hormone presence and potential physiological toxicity. This is the first study to determine these parameters in dams in Namibia at various stages of the seasons. Seven bioassays were used to determine oestradiol (E 2 ), oestrone (E 1 ) and testosterone (T) concentrations, as well as neurotoxicity, cytotoxicity and immunotoxicity, in water sampled during 2010 and 2011. Oestradiol and E 1 concentrations of up to 7.2 pg ml -1 and 7.6 pg ml -1 , respectively, were recorded. Testosterone concentrations measured up to 19 pg ml -1 . No cytotoxic effects were detected, while acetylcholinesterase (AChE) inhibition assays indicated low neurotoxic effects in Goreangab Dam (18% AChE inhibition) and no neurotoxic effects in other samples. The immune system biomarker interleukin-6 was high in all samples (457 pg ml -1 ; SD 54), with interleukin-10 being high only at Avis (46 pg ml -1 ), Goreangab (74 pg ml -1 ) and Swakoppoort (81 pg ml -1 ) dams. The results suggest that water from Goreangab and Swakoppoort dams may have the potential to modulate endocrine systems, and shows physiological toxicity.

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“…This includes the presence of endocrine disrupting compounds (EDCs) that may not be eliminated during the purification process or that may result from malfunctioning of the reclamation plant. Endocrine disrupting compounds include various natural and synthetic chemicals and compounds, the most important being natural and synthetic steroidal oestrogens and heavy metals (Bondegaard and Bjerregaard, 2005;Medesani et al, 2004;Rodríguez et al, 2007). These compounds may interfere directly with hormonal systems of various animals by mimicking or antagonising the effects of hormones, altering hormone synthesis and metabolism, and modifying hormone receptor levels (Burkhardt-Holm, 2010).…”

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confidence: 99%

Oestrogen, testosterone, cytotoxin and cholinesterase inhibitor removal during reclamation of sewage to drinking water

Faul

Julies

Pool

2013

WSA

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Namibia is the driest sub-Saharan country in Africa. Namibia's capital, Windhoek, reclaims sewage water for domestic use at the Goreangab Water Reclamation Plant (GWRP). Risks associated with sewage effluent and reclaimed sewage should be closely monitored; therefore water at the Gammams Sewage Treatment Plant (GSTP) inlet and outlet, as well as reclaimed water from the GWRP, were assayed using selected bioassays. Samples collected were analysed using enzyme-linked immunosorbent-assays and chromogenic tests for steroid hormones, neurotoxicity, cytotoxicity and inflammatory activity. Estradiol level at the sewage treatment inlet was 78 pg/mℓ and the treated sewage level showed an 83% to 95% reduction in this, while after reclamation the level was below detection limit. Estrone concentrations at the sewage treatment inlet ranged from 10 to 161 pg/mℓ. Sewage treatment reduced estrone by between 85% and 92%. After reclamation the level of estrone was below detection limit. Testosterone ranged between 162 and 405 pg/mℓ at the sewage plant inlet. Sewage treatment removed 96% of the initial testosterone. The residual testosterone was effectively removed by processes in GWRP and after reclamation no testosterone was detected in water. Acetylcholinesterase (AChE) inhibition at the sewage treatment inlet was 50% while it was only 27% after sewage treatment. After reclamation AChE inhibition was not detected. Only water at the sewage inlet in March and February showed cytotoxicity. High inflammatory activity was detected at the sewage plant inlet. Sewage treatment reduced inflammatory activity by 64%. After reclamation low inflammatory activity was induced. Treated sewage used for reclamation tested positive for most of the biomarkers and can pose a risk to human health. However, reclamation successfully removed these contaminants. Due to the presence of contaminants in the intake water at the reclamation plant, it is essential to routinely monitor the water produced by the reclamation plant for potential residues that can adversely affect human health.

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Association between cadmium and calcium uptake and distribution during the moult cycle of female shore crabs, Carcinus maenas: an in vivo study

Cited by 53 publications

References 50 publications

Molting as a mechanism of depuration of metals in the fiddler crab, Uca pugnax

Molting as a mechanism of depuration of metals in the fiddler crab, Uca pugnax

Steroid hormone concentrations and physiological toxicity of water from selected dams in Namibia

Oestrogen, testosterone, cytotoxin and cholinesterase inhibitor removal during reclamation of sewage to drinking water

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