| Two-Phase Uptake of Nickel in the Ground Beetle Pterostichus oblongopunctatus (Coleoptera: Carabidae): Implications for Invertebrate Metal Kinetics. | |
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MedLine Citation:
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PMID: 20686892 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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We studied nickel (Ni) kinetics in the ground beetle Pterostichus oblongopunctatus exposed to different, potentially stressful, temperatures. We found unexpected Ni kinetics in metal-exposed adult and larval beetles. Instead of the pattern observed commonly for other metals, i.e., an increase in metal concentration followed by stabilisation in the uptake phase and a decrease after transfer to uncontaminated food, the Ni-fed beetles apparently switched to decontamination soon after the start of Ni exposure while they were still being fed Ni-spiked food. In addition, internal body Ni concentrations showed high variance. The traditional first-order, one-compartment model with the switch to decontamination set to the last day of the uptake phase appeared inadequate and in most cases was nonsignificant. Instead, the model with a regression-estimated point of switching to decontamination fit the data better, explaining 57.2-91.5% of the temporal variability of mean Ni body concentrations (weighted regression) in adult beetles and 44.1-62.3% in larvae. Temperature did not affect Ni toxicokinetics in adults, but in larvae there were some temperature-dependent differences in kinetic parameters. |
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Authors:
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Agnieszka J Bednarska; Anna Brzeska; Ryszard Laskowski |
Publication Detail:
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Type: Journal Article Date: 2010-08-05 |
Journal Detail:
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Title: Archives of environmental contamination and toxicology Volume: 60 ISSN: 1432-0703 ISO Abbreviation: Arch. Environ. Contam. Toxicol. Publication Date: 2011 May |
Date Detail:
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Created Date: 2011-07-05 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0357245 Medline TA: Arch Environ Contam Toxicol Country: United States |
Other Details:
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Languages: eng Pagination: 722-33 Citation Subset: IM |
Affiliation:
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Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387, Kraków, Poland, a.bednarska@uj.edu.pl. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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