Université de Fribourg

A daphnia parasite (Caullerya mesnili) constitutes a new member of the ichthyosporea, a group of protists near the animal - fungi divergence

Lohr, Jennifer N. ; Laforsch, Christian ; Koerner, Henrike ; Wolinska, Justyna

In: Journal of Eukaryotic Microbiology, 2010, vol. 57, no. 4, p. 328–336

Caullerya mesnili is a protozoan endoparasite in the gut epithelium of Daphnia, which causes regular epidemics in lakes throughout Europe. Its classification has remained unchanged for over a century, leaving it placed with the Haplosporidia, despite speculation that this position is incorrect. The difficulty in classifying C. mesnili stems from its few known morphological and ecological...

Université de Fribourg

Prior residency does not always pay off – co-infections in Daphnia

Lohr, Jennifer N. ; Yin, Mingbo ; Wolinska, Justyna

In: Parasitology, 2010, p. -

The epidemiological and ecological processes which govern the success of multiple-species co-infections are as yet unresolved. Here we investigated prior versus late residency within hosts, meaning which parasite contacts the host first, to determine if the outcomes of intra-host competition are altered. We infected a single genotype of the waterflea Daphnia galeata with both the...

Université de Fribourg

Hatching with the enemy: Daphnia diapausing eggs hatch in the presence of fish kairomones

Lass, Sandra ; Vos, Matthijs ; Wolinska, Justyna ; Spaak, Piet

In: Chemoecology, 2005, vol. 15(1), p. 7

Infochemicals are known to play a key role in mediating predator-prey interactions, both in aquatic and terrestrial communities. However, state-dependent variation may exist in how effectively individuals can use this information, depending on genotype, life stage and experience. For our study, we used the predator-prey model system fish-waterflea Daphnia magna Straus (Cladocera,...