Comparison of Feeding Behavior with Varying Types of Prey the Ponto-Caspian Invader, HEMIMYSIS ANOMALA.
Copyright 2014 by Christopher Frazier. In accordance with Title 17 of the United States Code, Copyright Law of the United States of America, this material is copyrighted, and any further reproduction is prohibited without the permission of the copyright owner.
Hemimysis anomala, a native of the Ponto-Caspian region, has been discovered in the Laurentian Great Lakes in recent years. As such, it is important to gain an understanding of the behavior of this organism in order to predict the effects it could have on new ecosystems. In this experiment, small and large Daphnia sp., Artemia nauplii, & a mixture of wild-caught calanoid copepods were used in a basic feeding experiment under visual observation for comparisons of behavior and preference with different prey. It was found that male Hemimysis attacked and captured their prey more frequently than females, while no other behavioral differences were found between the two sexes. Additionally, Hemimysis encountered small Daphnia more frequently on average, but were more likely to attack and consume calanoid copepods. This preference for calanoid copepods above the other prey types used could be somewhat of an indication of the impacted native communities of the Laurentian Great Lakes. M