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Campo DC | Valor | Idioma |
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dc.contributor.author | Baldisserotto, Bernardo | - |
dc.contributor.author | Kamunde, Collins N. | - |
dc.contributor.author | Matsuo, Aline Y.O. | - |
dc.contributor.author | Wood, Chris M. | - |
dc.date.accessioned | 2020-06-15T22:03:58Z | - |
dc.date.available | 2020-06-15T22:03:58Z | - |
dc.date.issued | 2004 | - |
dc.identifier.uri | https://repositorio.inpa.gov.br/handle/1/18929 | - |
dc.description.abstract | The present study examined the interactions between elevated dietary calcium (as ionic Ca2+ in the form of CaCl2·2H 2O) and acute waterborne Cd exposure (50μg/l as CdNO3 for 3h) on whole body uptake and internal distribution of newly accumulated Cd, Ca2+, and Na+ in juvenile rainbow trout (Oncorhynchus mykiss). Fish were fed with three diets 20 (control), 30 and 60mg Ca 2+/g food: for 7 days before fluxes were measured with radiotracers over a 3h period. The two elevated Ca2+ diets reduced the whole body uptake of both Ca2+ and Cd by >50% and similarly reduced the internalization of both newly accumulated metals in most tissues, effects which reflect the shared branchial uptake route for Ca2+ and Cd. As the Ca2+ concentrations of the fluid phases of the stomach and intestinal contents were greatly elevated by the experimental diets, increased gastrointestinal Ca2+ uptake likely caused the down-regulation of the branchial Ca2+ (and Cd) uptake pathway. Waterborne Na + uptake and internal distribution were not affected. While plasma Ca2+ surged after the first two feedings of the 60mg Ca 2+/g diet, internal homeostasis was quickly restored. Total Ca 2+, Na+, and Cl- levels in tissues were not affected by diets. While dietary Ca2+ protected against waterborne Cd uptake, it did not protect against the relative inhibition of waterborne Ca2+ uptake caused by waterborne Cd. Acute exposure to 50μg/l Cd reduced the uptake and internalization of newly accumulated Ca2+ (but not Na+) by 70% or more, regardless of diet. Since elevated dietary Ca2+ reduces waterborne Cd uptake, fish eating a Ca 2+-rich invertebrate diet may be more protected against waterborne Cd toxicity in a field situation. © 2004 Elsevier B.V. All rights reserved. | en |
dc.language.iso | en | pt_BR |
dc.relation.ispartof | Volume 67, Número 1, Pags. 57-73 | pt_BR |
dc.rights | Restrito | * |
dc.subject | Cadmium | en |
dc.subject | Bioaccumulation | en |
dc.subject | Cadmium | en |
dc.subject | Calcium | en |
dc.subject | Diet | en |
dc.subject | Fish | en |
dc.subject | Animals Experiment | en |
dc.subject | Calcium Intake | en |
dc.subject | Controlled Study | en |
dc.subject | Gastrointestinal Absorption | en |
dc.subject | Internalization | en |
dc.subject | Nonhuman | en |
dc.subject | Priority Journal | en |
dc.subject | Protection | en |
dc.subject | Rainbow Trout | en |
dc.subject | Invertebrata | en |
dc.subject | Oncorhynchus | en |
dc.subject | Oncorhynchus Mykiss | en |
dc.subject | Oncorhynchus Mykiss | en |
dc.subject | Salmonidae | en |
dc.title | A protective effect of dietary calcium against acute waterborne cadmium uptake in rainbow trout | en |
dc.type | Artigo | pt_BR |
dc.identifier.doi | 10.1016/j.aquatox.2003.12.004 | - |
dc.publisher.journal | Aquatic Toxicology | pt_BR |
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