ABSTRACT
Freshwater crayfi sh have been used for ethological and behavioral studies for decades. They are ubiquitous polytrophic consumers within freshwater ecosystems that show high levels of aggression inter-and intraspecifi cally. Thus, they are well suited for fi eld and laboratory studies as well as studies focused on social behavior, predator-prey interactions, and foraging behaviors. Their sensory systems have been well documented as has their use of chemical signals in a number of diff erent behavioral situations. In addition, many diff erent species are highly mobile (both from natural and anthropogenic means) and are considered an invasive species in a large number of aquatic basins.
