Projekt

The transfer of genetic information across generations is a prerequisite of evolution. However, information can also be transferred to offspring non-genetically. Such transgenerational effects are particularly relevant in host-parasite interactions, where e.g. vertebrate mothers transfer antibodies to their offspring via eggs, blood or milk. Given the fitness costs and prevalence of parasites, such trans-generational immune priming may profoundly affect coevolutionary dynamics. Here the costs and interaction of transgenerational versus genetic determinants of parasite resistance will be studied in a fish with sex-role reversal. In the pipefish Syngnathus typhle males breed eggs in a placenta-like brood pouch. It is hypothesized that (i) under sex-role reversal males rather than females transfer antibodies or other immune components to the offspring. (ii) This should vary with the MHC genotype of parents. (iii) Immune priming is costly for parents, and it will be asked which costs offspring pay for immune activation. (iv) Under rapidly changing parasite genotypes of an abundant trematode parasite (Cryptocotyle lingua), immune priming is less beneficial than under a genetically constant parasite regime.

• Dr. Olivia Roth

  GEOMAR - Helmholtz-Zentrum für
  Ozeanforschung Kiel
  Marine Ökologie - Evolutionsökologie
  Evolutionary Ecology of Marine Fishes
  Kiel
  

• Prof. Dr. Thorsten Reusch

  GEOMAR - Helmholtz-Zentrum für
  Ozeanforschung Kiel
  FB 3: Marine Ökologie
  Forschungseinheit Marine Evolutionsökologie
  Kiel