Effects of Dietary Copper on Life-History Traits of a Tropical Freshwater Cladoceran

Effects of Dietary Copper on Life-History Traits of a Tropical Freshwater Cladoceran

Author Gusso-Choueri, Paloma Kachel Autor UNIFESP Google Scholar
Choueri, Rodrigo Brasil Autor UNIFESP Google Scholar
Lombardi, A. T. Google Scholar
Melao, M. G. G. Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Univ Fed Parana
Univ Santa Cecilia
Universidade Federal de São Carlos (UFSCar)
Abstract Life-history parameters of Ceriodaphnia cornuta (Cladocera: Daphniidae) fed on Pseudokirchneriella subcapitata (Chlorophyceae) exposed to different copper concentrations were investigated. C. cornuta individuals were reared in four treatments: (a) reconstituted water and non-contaminated algae (RW); (b) reconstituted water and copper-contaminated algae with either 1.28 x 10(-13) (10(-7)Cu) or (c) 1.93 x 10(-13) g Cu cell(-1) (10(-6)Cu); and (d) natural water from a local reservoir and non-contaminated algae (NW). Copper content in C. cornuta individuals increased as diet-borne exposure increased (RW < 10(-7)Cu < NW < 10(-6)Cu), except for NW individuals, which exhibited higher copper body burden than RW and 10(-7)Cu individuals, suggesting that some copper was available in the natural water. the results suggest that subacute levels of dietary copper stimulated C. cornuta's growth and reproduction, whereas organisms reared on reconstituted water showed nutritional deficiency. Depending on copper exposure concentration, either growth (lower Cu concentration) or reproduction (higher Cu concentration) was further stimulated, suggesting that an alteration of resource allocation is involved in diet-borne copper exposure. Because differences among treatments were only significantly different after day 12 of the experiment, our results reinforce that full life-cycle tests are more appropriate than the standard 7 day or three-brood chronic bioassays used to evaluate dietary copper effects at low, chronic copper inputs and that the use of standard test-organisms may not address site-specific situations for tropical environments.
Language English
Sponsor Fundacao Amparo a Pesquisa do Estado de São Paulo
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Grant number Fundacao Amparo a Pesquisa do Estado de São Paulo: 008/02078-9
Fundacao Amparo a Pesquisa do Estado de São Paulo: 2008/03487-0
CNPq: 472509/2006-3
CNPq: 314361/2009-0
Date 2012-05-01
Published in Archives of Environmental Contamination and Toxicology. New York: Springer, v. 62, n. 4, p. 589-598, 2012.
ISSN 0090-4341 (Sherpa/Romeo, impact factor)
Publisher Springer
Extent 589-598
Origin http://dx.doi.org/10.1007/s00244-011-9725-4
Access rights Closed access
Type Article
Web of Science ID WOS:000302809500005
URI http://repositorio.unifesp.br/handle/11600/34835

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