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Chapter and Conference Paper
Cyclomorphosis as a factor explaining success of a Daphnia hybrid in Tjeukemeer
Recent studies have shown that Daphnia hybrids are intermediate to their parental species for several life history traits, and that they combine advantageous traits of the parental species, thereby decreasing the...
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Article
Cyclomorphosis as a factor explaining success of a Daphnia hybrid in Tjeukemeer
Recent studies have shown that Daphnia hybrids are intermediate to their parental species for several life history traits, and that they combine advantageous traits of the parental species, thereby decreasing the...
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Article
Sexual reproduction in Daphnia: interspecific differences in a hybrid species complex
To investigate whether reproductive variation in the Daphnia galeata-cucullata-hyalina hybrid species complex can explain the occurrence of hybrids and backcrosses, a total of 43 clones from three north German la...
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Article
Temporal changes in the genetic structure of the Daphnia species complex in Tjeukemeer, with evidence for backcrossing
Temporal genetic variation was studied within the cyclic parthenogenetic Daphnia galeata-cucullata species complex in Lake Tjeukemeer (The Netherlands). During three successive years, three allozyme loci were stu...
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Chapter and Conference Paper
Hybridization in the Daphnia galeata complex: are hybrids locally produced?
Within the species complex of Daphnia galeata, D. cucullata and D. hyalina various combinations of hybrids and parental taxa occur in lakes throughout Europe. Since daphnids are cyclic parthenogens and mostly rep...
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Chapter and Conference Paper
Differential behaviour and shifts in genotype composition during the beginning of a seasonal period of diel vertical migration
During the first few weeks of a recurring seasonal period of diel vertical migration in Lake Maarsseveen (The Netherlands), part of the hybrid Daphnia galeata × hyalina population migrated, while another part rem...
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Article
Tail spine length in the Daphnia galeata complex: costs and benefits of induction by fish
We studied the combined effect of fish kairomones and food conditions on the relative tail spine length (RTL) of five Daphnia taxa, and the interaction of these factors with the vertical distribution of the da...
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Article
Preface; Cladocera: the Biology of Model Organism
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Article
Hybridization in the Daphnia galeata complex: are hybrids locally produced?
Within the species complex of Daphnia galeata,D. cucullata and D. hyalina variouscombinations of hybrids and parental taxa occur inlakes throughout Europe. Since daphnids are cyclicparthenogens and mostly repr...
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Article
Differential behaviour and shifts in genotype composition during the beginning of a seasonal period of diel vertical migration
During the first few weeks of a recurring seasonalperiod of diel vertical migration in Lake Maarsseveen(The Netherlands), part of the hybrid Daphniagaleata × hyalina population migrated, whileanother part rema...
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Article
Genetic markers, genealogies and biogeographic patterns in the cladocera
Cladoceran crustaceans are an important component of zooplankton in a wide range of freshwater habitats. Although the ecological characteristics of several cladoceran species have been well studied, biogeograp...
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Article
Does trimethylamine induce life-history reactions in Daphnia?
Laboratory experiments were carried out to investigate life-history reactions of Daphnia to trimethylamine (TMA), a substance, which has recently been found to induce a similar phototactic reaction in Daphnia as ...
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Article
Carbon as an indicator of Daphnia condition in an alpine lake
Carbon–length relationships can be used to indicate the condition of daphnids in natural situations. We examined the Daphnia galeata population of an alpine lake (Oberer, Arosasee, Switzerland), where most indivi...
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Article
The influence of fish kairomones on the induction and vertical distribution of sexual individuals of the Daphnia galeata species complex
To assess the potential production of hybrids and backcrosses in a semi-natural environment, we studied the combined effect of fish kairomone, and food level on the production of males and ephippial females in...
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Article
Genetic differentiation of Baetis alpinus Pictet (Ephemeroptera: Baetidae) in fragmented alpine streams
The interpretation of low FST values as evidence of high levels of gene flow among habitat fragments may be confounded by population genetic structures that are indicative of historical rather than present-day le...
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Article
Chemically induced anti-predator defences in plankton: a review
Planktonic organisms exhibit diverse morphological, behavioural and life-history responses to the chemical presence of potential predators. Prey organisms have been found to sense such predators via predator-d...
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Article
No Evidence for Adaptive Micro-Evolution to a Decrease in Phosphorus-Loading of a Daphnia Population Inhabiting A Pre-Alpine Lake
Many polluted lakes in Europe are being restored and phosphorus concentrations have dropped dramatically in these lakes. We studied the genetic structure of Daphnia galeata over the past 30 years in Lake Greifens...
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Article
Amplified Fragment Length Polymorphism (AFLP) Reveals Species-Specific Markers in the Daphnia Galeata–HyalinaSpecies Complex
Daphnia often occur in species complexes that consist of two or more co-occurring species and their hybrids. Hybrid individuals are often capable of sexual reproduction and so backcrossing with introgression occ...
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Article
Hatching with the enemy: Daphnia diapausing eggs hatch in the presence of fish kairomones
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 ...
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Article
Macroinvertebrate diversity in fragmented Alpine streams: implications for freshwater conservation
Lakes and reservoirs disrupt the longitudinal connectivity of streams, considerably affecting benthic macroinvertebrate assemblages and diversity. Changes in assemblage composition within fragments can result ...
