Allometric relations for Ceriodaphnia spp. and Daphnia spp.

Tannery wastewater characterization and toxicity effects on Daphnia spp.

Tannery wastewater contains large quantities of organic and inorganic compounds, including toxic substances such as sulfides and chromium salts. The evaluation of wastewater quality in Chile nowadays is based on chemical specific measurements and toxicity tests. The goal of this research was to characterize tannery wastewater and to relate its physical/chemical parameters with its acute toxicit...

Acute toxicity of thallium to Daphnia magna and Ceriodaphnia dubia.

Complex Interactions between Natural Coexploiters--Daphnia and Ceriodaphnia

This study concerns a seasonal succession of a large herbivore, Daphnia pule.^, by a smaller one. Crrioduphniu reticulata, in a Minnesota pond. Based on a description of events in the pond and results of several field experiments, one can explain this replacement in terms of a coexploitative interaction between these 2 species. The field experiments. in which pairs of cladocerans were isolated ...

Heat Resistance in Liquids of Enterococcus spp., Listeria spp., Escherichia coli, Yersinia enterocolitica, Salmonella spp. and Campylobacter spp

The aim of the work was to collect, evaluate, summarize and compare heat resistance data reported for Campylobacter, Enterococcus, Escherichia, Listeria, Salmonella and Yersinia spp. The work was limited to resistance in liquids with pH values 6-8. Results obtained under similar experimental conditions were sought. Thermal destruction lines for the various bacterial groups studied were construc...

Variable-number tandem repeats as molecular markers for biotypes of Pasteuria ramosa in Daphnia spp.

Variable-number tandem repeats (VNTRs) have been identified in populations of Pasteuria ramosa, a castrating endobacterium of Daphnia species. The allelic polymorphisms at 14 loci in laboratory and geographically diverse soil samples showed that VNTRs may serve as biomarkers for the genetic characterization of P. ramosa isolates.