Abstaining Boobies Get "Sexier"

This video requires the latest version of Flash Player. Click here to download.

Published December 8, 2009

Male blue-footed boobies that take a yearlong sex sabbatical get a brighter shade of blue in their feet the following year, which makes them more attractive to females, a new study says.

Unedited Transcript:

Blue-footed boobies are best known for their bright blue webbed feet. Prominently displayed in a courtship dance, the males blue feet are important in attracting females.

A new study shows that while attractiveness of the blue feet diminishes with age in males that reproduce each year, if males skip a breeding season and dont mate, they displayed a more attractive foot color and had more green chroma.

Breeding for these tropical seabirds involves more than just the mating itself. Boobies have a long period of biparental care in other words, the males are active participants in raising their young. The eggs are incubated for 45 days, and chicks stay with their parents for a four-month rearing period.

The study, published in The Royal Society's Biology Letters, was conducted by researchers from University of Vigo in Spain, and the National Autonomous University of Mexico.

They studied more than a hundred male blue-footed boobies over a total of six months in 2004 and 2005 on Mexicos Isla Isabel, and measured their green chroma using a spectrophotometer.

They concluded that its likely the sabbaticals from reproducing offspring may allow the male boobies to physically recover and display brighter feet in their quest in finding a mate.

0 comments

Sort: Newest | Oldest

Gorgeous New Arctic Lightscapes

"Unreal" Aurora Images "Infect" Photographer

More »

Latest News

Celebrating 125 Years

Explorer Moment: Ray of Hope

Biologist Andrea Marshall leads her team in discovering new and conserving known manta ray species.
Sylvia Earle on Women in Science

Sylvia Earle reflects on her scientific career and on gender obstacles she faced along the way.