Copyright ©2014 NPR. For personal, noncommercial use only. See Terms of Use. For other uses, prior permission required.

RACHEL MARTIN, HOST:

Most mammals have love 'em and leave 'em relationships, but not the prairie vole. They mate for life, sharing nest-building duties, and they share an equal role in raising their young. It looks a lot like a relationship many of us would like to have. Prairie voles have long been of interest to scientists, looking at the neurobiology of bonding and monogamy. Larry Young is one of those scientists, from the Yerkes National Primate Research Center in Atlanta, Georgia. He joins me now. Welcome to the program, Larry.

LARRY YOUNG: Thank you.

MARTIN: Let's start with the courtship phase of this relationship. What happens when a male prairie vole spots an eligible female?

YOUNG: Well, the first thing he has to do is to get her interested in him and he does that by kind of just courting her. And the smell of her pheromones gets her brain activated and she starts turning out steroid hormones, like estrogen. And after about 24 hours she's ready to mate.

MARTIN: OK. So, in the wild, prairie voles don't have a long life expectancy. But in the lab, where they're under the conditions where they can have longer lives, I understand that bond is strong enough to keep them together for a long time.

YOUNG: Absolutely. They'll stay together for the rest of their life, which in the lab is around two or three years. But even in the wild, they're known as the potato chip of the prairie because they are preyed upon by hawks and other things. But, you know, they can live for a year or so. And in about 80 percent of the cases where a male or a female loses their partner, they never take on another partner. So, they really do stay together for life.

MARTIN: Wow. That's amazing. They're not always faithful though.

YOUNG: Yes. Actually, this is one of the features that actually I think makes it an even better model for humans than you might think. Because even though they are together, if a male is wandering through the prairie and a female who's in estrous comes by, he may mate with her. But the important thing is he comes back to his partner at night. And that's what we're really studying here. We're studying the bond between the two.

MARTIN: That's not enough, Larry. That's not enough...

YOUNG: I'm sorry. That's...

MARTIN: ...to just come home.

(LAUGHTER)

YOUNG: ...that's the best that we can do with these animals. And in fact, most monogamous species - only about 3 percent of mammals exhibit this kind of monogamy. But in almost all of those species, there is some cheating that occurs.

MARTIN: Does all this mean that one day there will be some kind of infidelity vaccine? I mean, is that possible? Is that why you're studying the voles?

YOUNG: No, we're not studying the voles to try to find an infidelity vaccine or even a love vaccine. No, I think the importance of this work is, you know, if we understand the biology underlying relationships, maybe we can help get better ideas about how to improve those relationships, how to change our behaviors to help spark that neurochemistry in our brain that will help us maintain lifelong relationships with our partner.

MARTIN: A lot to learn from the romantic patterns of voles. Larry Young. He's the author of "The Chemistry Between Us." Thanks so much for talking with us, Larry.

YOUNG: Thank you for having me. It's been wonderful.

(SOUNDBITE OF MUSIC)

QUEEN: (Singing) Crazy thing called love.

MARTIN: This is NPR News.

Copyright © 2014 NPR. All rights reserved. No quotes from the materials contained herein may be used in any media without attribution to NPR. This transcript is provided for personal, noncommercial use only, pursuant to our Terms of Use. Any other use requires NPR's prior permission. Visit our permissions page for further information.

NPR transcripts are created on a rush deadline by a contractor for NPR, and accuracy and availability may vary. This text may not be in its final form and may be updated or revised in the future. Please be aware that the authoritative record of NPR's programming is the audio.

Comments

 

Please keep your community civil. All comments must follow the NPR.org Community rules and terms of use, and will be moderated prior to posting. NPR reserves the right to use the comments we receive, in whole or in part, and to use the commenter's name and location, in any medium. See also the Terms of Use, Privacy Policy and Community FAQ.