Yes. That conclusion is based on a bioenergetics model. That is the standard model for determining whether or not there's enough food in an area for a population to become established. We're talking about an established population that would number in the thousands. There's certainly enough food in terms of the plankton and the pseudofeces. The pseudofeces is really an emerging food that we never knew they would use, based on the European literature from where they are native. It's something that's based on recent studies done by our colleagues in the United States, that this is a new food source. There's certainly plenty of food to establish a reproducing population with thousands of individuals.
On October 16th, 2012. See this statement in context.