Meeting Abstract
Eisenia fetida (common name: red worm) is a member species of the phylum Annelida, which generally encompasses segmented worms. Eisenia is a terrestrial species that functions as a decomposer and is noted for its ability to survive after fragmentation, whether artificial or natural (Xiao, Ge, & Edwards 2011). The purpose of this experiment was to determine the regenerative properties of Eisenia fetida and whether or not this species might also be used as a model for regeneration. It was hypothesized that the anterior fragments would be more successful in regeneration and survival than the posterior fragments. The results of this study indicate that Eisenia do not regenerate as fast or as well as Lumbriculus, although they do exhibit relatively consistent behaviors and physical changes during wound healing and regeneration. These changes, that appear mainly in the posterior fragments, include adapting head behaviors and fissioning. The anterior fragments showed unexpected behavior as well by going into a state of hibernation and then dying soon after. Overall it was found that Eisenia worms are not a good model for regenerative investigations as compared to Lumbriculus variegatus.
