Evol Ecol Res 9: 947-958 (2007) Full PDF if your library subscribes.
Co-infection, kin selection, and the rate of host exploitation by a parasitic nematode
Farrah Bashey,* Levi T. Morran‡ and Curtis M. Lively
Department of Biology, Indiana University, 1001 E. 3rd Street, Bloomington, IN 47405, USA
Author to whom all correspondence should be addressed.
Hypothesis: Under exploitative competition, unrelated parasites should reproduce at a faster rate than related parasites.
Organisms: The parasitic nematode Steinernema carpocapsae and the insect host Galleria mellonella.
Methods: We created ten replicate lines each of high-migration (unrelated) and low-migration (related) nematode populations, and allowed them to evolve for 20 host passages.
Results: We found no difference between treatments in the number of juvenile nematodes produced. However, juvenile nematodes began to emerge significantly sooner in the low-migration treatment, suggesting a faster rate of host exploitation. Host mortality rate was also higher in the low-migration lines.
Conclusion: The results were contrary to predictions based on exploitative competition among the nematodes.
Keywords: competition, evolution of virulence, experimental evolution, kin selection, Steinernema carpocapsae, Xenorhabdus nematophila.
DOWNLOAD A FREE, FULL PDF COPY
IF you are connected using the IP of a subscribing institution (library, laboratory, etc.)
or through its VPN.
© 2007 Farrah Bashey. All EER articles are copyrighted by their authors. All authors endorse, permit and license Evolutionary Ecology Ltd. to grant its subscribing institutions/libraries the copying privileges specified below without additional consideration or payment to them or to Evolutionary Ecology, Ltd. These endorsements, in writing, are on file in the office of Evolutionary Ecology, Ltd. Consult authors for permission to use any portion of their work in derivative works, compilations or to distribute their work in any commercial manner.
Subscribing institutions/libraries may grant individuals the privilege of making a single copy of an EER article for non-commercial educational or non-commercial research purposes. Subscribing institutions/libraries may also use articles for non-commercial educational purposes by making any number of copies for course packs or course reserve collections. Subscribing institutions/libraries may also loan single copies of articles to non-commercial libraries for educational purposes.
All copies of abstracts and articles must preserve their copyright notice without modification.