Have a personal or library account? Click to login
The effects of CaCl2 and CaBr2 on the reproduction of Daphnia magna Straus / Učinak CaCl2 i CaBr2 na razmnožavanje vodenbuhe (Daphnia magna Straus) Cover

The effects of CaCl2 and CaBr2 on the reproduction of Daphnia magna Straus / Učinak CaCl2 i CaBr2 na razmnožavanje vodenbuhe (Daphnia magna Straus)

Open Access
|Jun 2015

Abstract

Concentrated CaCl2 and CaBr2 salt solutions of densities up to 2.3 kg L-1 are regularly used to control hydrostatic pressure in oil wells during special operations in the exploration and production of natural gas and crude oil. Various concentrations of high density salts are frequently left in mud pits near the drilling site as waste, polluting fresh and ground waters by spillage and drainage. The toxic effects of these salts have already been observed. This study investigated the effects of CaCl2 and CaBr2 on water flea Daphnia magna Straus in a 21-day reproduction test. The three tested concentrations of CaCl2 (240, 481, and 1925 mg L-1) caused a significant dose-response decrease of reproduction (p<0.001). With CaBr2 (533 and 1066 mg L-1), only aborted eggs were produced, demonstrating the embryotoxicity of the substance. The results suggest that high concentrations of the tested chemicals are harmful to Daphnia’s reproduction and could reduce its abundance.

DOI: https://doi.org/10.1515/aiht-2015-66-2516 | Journal eISSN: 1848-6312 | Journal ISSN: 0004-1254
Language: English, Croatian, Slovenian
Page range: 135 - 140
Submitted on: Mar 1, 2014
Accepted on: May 1, 2015
Published on: Jun 25, 2015
Published by: Institute for Medical Research and Occupational Health
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2015 Neda Mažuran, Vladimir Hršak, Goran Kovačević, published by Institute for Medical Research and Occupational Health
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.