| Accumulation of dietary and aqueous cadmium into the epidermal mucus of the discus fish Symphysodon sp. | |
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MedLine Citation:
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PMID: 21482221 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The discus fish Symphysodon sp. is an Amazonian cichlid with a unusual form of parental care where fry obligately feed from parental mucus for the first few weeks of life. Here, we investigated the possible impact of environmental cadmium on this species, particularly with respect to mucus contamination. We exposed groups of fish to cadmium either through their food (400mgkg(-1)) or through the water (3μgl(-1)) for 4weeks, and measured tissue concentrations and ATPase activities at weekly intervals. Cadmium significantly accumulated in all tissues (except for muscle) after 7days, and tissue concentrations increased until the end of the experiment. Significant alterations in ATPase activities of intestine and kidney were observed at day 7 and 14, but no alterations in gill ATPase activities occurred. The epidermal mucus showed a high accumulation of cadmium from both exposures, but particularly from the diet, indicating that dietary cadmium can be transferred from gut to mucus. Combining this data with approximations of fry bite volumes and bite frequencies, we constructed daily estimates of the cadmium that could potentially be consumed by newly hatched fry feeding on this mucus. These calculations suggest that feeding fry might consume up to 11μgg(-1)day(-1), and hence indicate that this species' dependency on parental mucus feeding of fry could make them particularly susceptible to cadmium contamination of their native habitat. |
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Authors:
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Richard J Maunder; Jonathan Buckley; Adalberto L Val; Katherine A Sloman |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-17 |
Journal Detail:
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Title: Aquatic toxicology (Amsterdam, Netherlands) Volume: 103 ISSN: 1879-1514 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-4-12 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8500246 Medline TA: Aquat Toxicol Country: - |
Other Details:
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Languages: ENG Pagination: 205-212 Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier B.V. All rights reserved. |
Affiliation:
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School of Marine Science and Engineering, University of Plymouth, Drake Circus, Plymouth, PL4 8AA, UK. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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