A new University of Georgia and Emory University study of monarch butterflies and parasites, that hitch a ride on their hosts, are benefited by reproducing rapidly but the cost is to their hosts. The study is known as the “trade-off hypothesis.” People think “Why do the parasites hurt their hosts?” They have to in order to replicate.
Parasites can’t hurt their hosts too much. Otherwise they will suffer along with their hosts. The researchers used monarch butterflies too hop with their studies. They injected the butterflies with varying levels of spores from a protozoan parasite commonly found in wild populations. The most injected ones died but the other butterflies lived and gave offspring and most of them were not affected.
To read more on this article click here.