
Rats as Test Subjects
While rats lack the complex ability to speak that humans have developed, their social relationships aren't all that different from ours. At a basic level, they communicate, raise young, bond and procreate just like we do. Rats have long been test subjects for medications intended for future use on humans. More recently, however, researchers have begun to use them in social experiments that take into account their overall happiness and satisfaction. In one such experiment, for example, researchers found that rats who were allowed access to both cocaine and other friendly rats actually preferred the company of friendly rats. Extrapolating, researchers suggested that troubled humans might perhaps forego drug use if given access to improved social connections.Rodent Communication
Rodents communicate in simpler ways than humans, but they are still perfectly capable of expressing themselves to form surprisingly complex messages. To succeed, they use a combination of vocalizations, pheromones and body language.- Vocalizations can let other animals know where a single animal is, and mother rats use chirps to locate their young. Although scientists are still decoding rat vocalizations, different sounds appear to convey different messages.
- Pheromones disseminated through urine can affect the behaviour of other animals in many interesting ways, most of which have to do with mating. Male rats often spray a distinctive scent to attract females and deter other males from encroaching on their territories.
- Just like dogs, apes and "higher" mammals, rat body language can subtlety communicate an animal's internal state to others. Other physical behaviours like grooming also let other animals know that they are welcome and accepted into a colony.