1) The prairie vole is one such animal.

2) sure enough, when a female prairie vole mates, there is a 50% increase in the level of dopamine in the reward centre of her brain.

3) Because the prairie vole has the needed receptors in its brain for these hormones in the regions responsible for reward and reinforcement,(http:///prairie vole.html) it forms a bond with its mate.

4) Their study was conducted in the prairie vole, a small rodent that mates for life.

5) It turns out that the faithful prairie vole has receptors for oxytocin and vasopressin in brain regions associated with reward and reinforcement, whereas the montane vole does not.

6) But, in contrast to the prairie vole, at no time do rats learn to associate sex with a particular female.

7) The prairie vole, which is monogamous, bonds with one female for life, even if he's presented with other, fertile females.

8) In prairie vole society, sex is the prelude to a long-term pair bonding of a male and female.

9) The prairie vole is a sociable creature, one of the only 3% of mammal species that appear to form. monogamous relationships.

10) Hostess To study how pair-bonding happens, researchers have turned to a small, brown rodent, called the prairie vole.

11) By altering the small animal's brain hormone chemistry, scientists have made a promiscuous meadow vole faithful - just like its prairie vole cousin.

12) What if you went to a business convention and then, like an artificially stimulated prairie vole, bonded with the nearest stranger?

13) Hostess If some of the chemically-controlled behavior of the prairie vole seems familiar, perhaps it's because human beings also produce oxytocin and vasopressin.