6 Works

Data from: Offspring social network structure predicts fitness in families

Nick J. Royle, Thomas W. Pike, Phillip Heeb, Heinz Richner, Mathias Kölliker & M. Kolliker
Social structures such as families emerge as outcomes of behavioural interactions among individuals, and can evolve over time if families with particular types of social structures tend to leave more individuals in subsequent generations. The social behaviour of interacting individuals is typically analysed as a series of multiple dyadic (pair-wise) interactions, rather than a network of interactions among multiple individuals. However, in species where parents feed dependent young, interactions within families nearly always involve more...

Data from: Contrasting the distribution of phenotypic and molecular variation in the freshwater snail Biomphalaria pfeifferi, the intermediate host of Schistosoma mansoni

Yves-Nathan Tah Tian-Bi, Philippe Jarne, Jean-Noel Kouamé Konan, Jüerg Utzinger & Eliézer Kouakou N'Goran
Population differentiation was investigated by confronting phenotypic and molecular variation in the highly selfing freshwater snail Biomphalaria pfeifferi, the intermediate host of Schistosoma mansoni. We sampled seven natural populations separated by a few kilometers, and characterized by different habitat regimes (permanent/temporary) and openness (open/closed). A genetic analysis based on five microsatellite markers confirms that B. pfeifferi is a selfer (s≈0.9) and exhibits limited variation within populations. Most pairwise FST were significant indicating marked population structure,...

Data from: A novel approach to parasite population genetics: experimental infection reveals geographic differentiation, recombination, and host-mediated population structure in Pasteuria ramosa, a model bacterial parasite of Daphnia

Jason P. Andras & Dieter Ebert
The population structure of parasites is central to the ecology and evolution of host-parasite systems. Here, we investigate the population genetics of Pasteuria ramosa, a bacterial parasite of Daphnia. We used natural P. ramosa spore banks from the sediments of two geographically well-separated ponds to experimentally infect a panel of Daphnia magna host clones whose resistance phenotypes were previously known. In this way, we were able to assess the population structure of P. ramosa based...

Data from: Hosts are ahead in a marine host-parasite coevolutionary arms race: innate immune system adaptation in pipefish Syngnathus typhle against Vibrio phylotypes

Olivia Roth, Isabel Keller, Susanne H. Landis, Walter Salzburger & Thorsten B. H. Reusch
Microparasites have a higher evolutionary potential than their hosts due to an increased mutation rate and a shorter generation time which usually results in parasites being locally adapted to their sympatric hosts. This pattern may not apply to generalist pathogens as adaptation to sympatric host genotypes is disadvantageous due to a narrowing of the host range, in particular under strong gene flow among host populations. Under this scenario, we predict that the immune defence of...

Data from: Occurrence, costs and heritability of delayed selfing in a free-living flatworm

Steven A. Ramm, Dita B. Vizoso & Lukas Schärer
Evolutionary theory predicts that in the absence of outcrossing opportunities, simultaneously hermaphroditic organisms should eventually switch to self-fertilization as a form of reproductive assurance. Here we report the existence of facultative self-fertilization in the free-living flatworm Macrostomum hystrix, a species in which outcrossing occurs via hypodermic insemination of sperm into the parenchyma of the mating partner. First, we show that isolated individuals significantly delay the onset of reproduction compared to individuals with outcrossing opportunities (“delayed...

Data from: The ecological and genetic basis of convergent thick-lipped phenotypes in cichlid fishes

Marco Colombo, Eveline T. Diepeveen, Moritz Muschick, M. Emilia Santos, Adrian Indermaur, Nicolas Boileau, Marta Barluenga & Walter Salzburger
The evolution of convergent phenotypes is one of the most interesting outcomes of replicate adaptive radiations. Remarkable cases of convergence involve the thick-lipped phenotype found across cichlid species flocks in the East African Great Lakes. Unlike most other convergent forms in cichlids, which are restricted to East Africa, the thick-lipped phenotype also occurs elsewhere, e.g. in the Central American Midas Cichlid assemblage. Here we use an ecological genomic approach to study the function, the evolution...

Registration Year

  • 2012

Resource Types

  • Dataset


  • University of Basel
  • GEOMAR Helmholtz Centre for Ocean Research Kiel
  • University of Bern
  • Paul Sabatier University
  • Museo Nacional de Ciencias Naturales
  • University of Exeter