Performance of standard media in toxicological assessments with Daphnia magna: chelators and ionic composition versus metal toxicity

Ecotoxicology ◽  
2010 ◽  
Vol 20 (1) ◽  
pp. 139-148 ◽  
Author(s):  
Cláudia Loureiro ◽  
Bruno B. Castro ◽  
Joana Luísa Pereira ◽  
Fernando Gonçalves
Keyword(s):  
Daphnia Magna ◽  
Metal Toxicity ◽  
Ionic Composition

Liposomes as an alternative delivery system for investigating dietary metal toxicity to Daphnia magna

2011 ◽  
Vol 105 (3-4) ◽  
pp. 661-668 ◽  
Author(s):  
Roel Evens ◽  
Karel A.C. De Schamphelaere ◽  
Lieve Balcaen ◽  
Yingying Wang ◽  
Karen De Roy ◽  
...  
Keyword(s):  
Daphnia Magna ◽  
Delivery System ◽  
Metal Toxicity ◽  
Alternative Delivery

INFLUENCE OF ORGANISM AGE ON METAL TOXICITY TO DAPHNIA MAGNA

2007 ◽  
Vol 26 (6) ◽  
pp. 1198 ◽  
Author(s):  
Tham C. Hoang ◽  
Stephen J. Klaine
Keyword(s):  
Daphnia Magna ◽  
Metal Toxicity

Latent Effects of Pulse Exposure to Aluminum and Low pH on Size, Ionic Composition, and Feeding Efficiency of Lake Trout (Salvelinus namaycush) Alevins

1987 ◽  
Vol 44 (8) ◽  
pp. 1418-1424 ◽  
Author(s):  
John M. Gunn ◽  
David L G. Noakes
Keyword(s):  
Daphnia Magna ◽  
Lake Trout ◽  
Ionic Composition ◽  
Salvelinus Namaycush ◽  
Low Ph ◽  
Whole Body ◽  
Pulse Exposure ◽  
Feeding Efficiency ◽  
Latent Effects

No mortality of lake trout (Salvelinus namaycush) embryos occurred during 5 d of exposure to aluminum concentrations of 0, 100, and 200 μg∙L−1 in low-pH (pH 5.0) water or during 21- and 32-d recovery periods, but alevins from the high-Al exposure were smaller in length, had less calcified skeletons, had reduced (18–22%) whole-body concentrations of Ca2+ and K+, and were less effective predators on Daphnia magna. These latent effects of pulse exposure to acidic Al-rich water may help explain the disappearance of lake trout populations from lakes with relatively high ambient pH.

Two-Compartment Toxicokinetic–Toxicodynamic Model to Predict Metal Toxicity in Daphnia magna

2012 ◽  
Vol 46 (17) ◽  
pp. 9709-9715 ◽  
Author(s):  
Qiao-Guo Tan ◽  
Wen-Xiong Wang
Keyword(s):  
Daphnia Magna ◽  
Metal Toxicity

Membrane-bound vesicles associated with the microvilli in the midgut of the freshwater microcrustacean, Daphnia magna

1983 ◽  
Vol 41 ◽  
pp. 480-481
Author(s):  
Patricia L. Jansma
Keyword(s):  
Daphnia Magna ◽  
Intestinal Epithelial Cells ◽  
Uranyl Acetate ◽  
Intestinal Epithelial ◽  
Chlamydomonas Reinhardii ◽  
Thin Sections ◽  
Saturated Water ◽  
Cacodylate Buffer ◽  
Membrane Bound ◽  
Ethanol Series

The presence of the membrane bound vesicles or blebs on the intestinal epithelial cells has been demonstrated in a variety of vertebrates such as chicks, piglets, hamsters, and humans. The only invertebrates shown to have these microvillar blebs are two species of f1ies. While investigating the digestive processes of the freshwater microcrustacean, Daphnia magna, the presence of these microvillar blebs was noticed.Daphnia magna fed in a suspension of axenically grown green alga, Chlamydomonas reinhardii for one hour were narcotized with CO2 saturated water. The intestinal tracts were excised in 2% glutaraldehyde in 0.2 M cacodyl ate buffer and then placed in fresh 2% glutaraldehyde for one hour. After rinsing in 0.1 M cacodylate buffer, the sample was postfixed in 2% OsO4, dehydrated with a graded ethanol series, infiltrated and embedded with Epon-Araldite. Thin sections were stained with uranyl acetate and Reynolds lead citrate before viewing with the Philips EM 200.

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