Effects of CaCl2 and CaBr2 on the fecundity of Planorbarius corneus L.

Effects of Schistosoma mansoni and Schistosoma haematobium infections on calcium content in their intermediate hosts

“…The phagocytic activity of hemocytes and lectins cooperating in defense reactions depends on the presence of calcium ions in the hemolymph (Zelck et al 1995). Moreover, a large amount of calcium are used in the reproduction of the snails (Mazuran et al 1999). In addition, reduction in calcium concentration in water can reduce the occurrence of the snails in aquatic system (Young and Harris 1974).…”

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

“…Growth inhibition was observed in the green algae Chlorella kessleri at 21320 mg L -1 CaBr 2 (5). The study on P. corneus showed a significant dose response decrease of survival and fecundity (egg-mass number) in chronic toxicity test at concentrations ranging from 1203 to 4813 mg L -1 CaCl 2 , 1066 to 5329 mg L -1 CaBr 2 , and 774 to 5801 mg L -1 of their mixture 1:1 (8).…”

“…Several studies investigating the toxic effects of concentrated solutions of CaCl 2 and CaBr 2 have been performed using plant test systems and an animal test organism, the freshwater snail Planorbarius corneus (Linnaeus, 1758) (4)(5)(6)(7)(8). Studies on plants (4-7) showed a significant inhibition of duckweed (Lemna minor) growth at higher concentrations of CaCl 2 (5550, 8325, and 9624 mg L -1 ) and CaBr 2 (14931 and 21320 mg L -1 ).…”

Growth and Reproduction of Planorbarius corneus (Linnaeus, 1758) in Laboratory Conditions

“…Egg masses and the number of eggs are easy to count, the development of eggs is easy to observe and maintenance is inexpensive. In partial life-cycle reproduction, toxicity tests conducted with P. corneus measuring fecundity proved to be a highly sensitive parameter to evaluate the toxicity of various substances (Mazuran et al, 1999). In 2010, the OECD (Organisation for Economic Co-operation and Development) published the Detailed Review Paper (DRP) on Molluscs Life-Cycle Toxicity Testing with the purpose of recommending toxicity testing methods with molluscs, which might be developed into OECD Guidelines for long-term toxicity tests for a regulatory assessment of the effect of chemicals.…”

“…P. corneus and other freshwater snails have been used for decades in ecotoxicological research but mainly on specimens collected shortly prior to the experiments without laboratory culturing (Klobučar et al, 1997(Klobučar et al, , 2001Lajtner et al, 1996Lajtner et al, , 2003Otludil et al, 2004;Pavlica et al, 2000;Špoljar et al, 2005). The aim of this paper is to present the results of analyses on the reproduction and growth of P. corneus over the course of several years of continuous rearing in the laboratory, which was conducted in order to use them as a test organism for partial life-cycle and full life-cycle toxicity testing (Mazuran et al, 1999). The quantitative results of reproduction and growth in laboratory conditions are presented.…”