Navigation Links
Why birds of a feather lek together
Date:2/29/2012

CORAL GABLES, FL -- Certain kinds of male birds gather into small clusters of land called leks to perform their courtship dances, and according to science, who they choose to associate with matters. A new study by University of Miami Evolutionary Biologist J. Albert Uy and his collaborators finds that some male birds are better at attracting females if they gather with close male kin, than in the company of distant relatives. The findings provide an intriguing account of why individuals help each other, especially when cooperating can be costly.

The study is titled "Kin selection may contribute to lek evolution and trait introgression across an avian hybrid zone." The article is available online in Early View and will be in print in March, Volume 21 Issue 6 of Molecular Ecology.

In relatively recent times in the evolution of life, some manakin birds of Central America split into two groups. White-collared manakins occupy the area from Mexico to Panama, while yellow-collared manakins live between Panama and Colombia. Males are colorful, while females are brown. The two species meet in northwest Panama and form leks together, which gives scientists the opportunity to see what happens when new species reunite.

The researchers found that in the area where the two manakin species come together, females are attracted to yellow-collared males more than to white-collared males, but only when there are lots of other yellow males within leks. Biologists call this effect "positive frequency dependent selection."

"Where females can compare white and yellow males simultaneously, the yellow males do a lot better than white males, but only with high numbers of other yellow males independent of lek size," says Uy, associate professor of Biology in the College of Arts and Sciences at UM and principal investigator of this project. "White males do not experience a mating advantage, regardless of lek composition."

However, only a few of the yellow males in each lek get all the girls. So why do other yellow males help? The new study finds that the yellow males within leks are more closely related than males between leks. This suggests the possibility that even less successful relatives may profit from lekking with their Don Juan-like cousins.

"We think that these yellow males that help out their relatives are benefiting by passing on their family genes indirectly," says Uy. "It's a bit controversial, but it adds evidence of what is called kin selectionselection driven by kinshippushing some of the dynamics of lekking, as well affecting the interactions between two species when they re-establish contact."
'/>"/>

Contact: Marie Guma-Diaz
ummedia@miami.edu
305-284-5500
University of Miami
Source:Eurekalert  

Related biology news :

1. Captain Birdseyes robotic nose
2. Beavers: Dam good for songbirds
3. Genetic evidence for avian influenza movement from Asia to North America via wild birds
4. Practice as well as sleep may help birds learn new songs
5. The birds of Spain, in a digital ornithological encyclopedia
6. Shade coffee benefits more than birds
7. Birds in Flint Hills of Kansas, Oklahoma face population decline despite large habitat
8. Climate change affecting Europes birds now, say researchers
9. Female birds jam their mates flirtatious songs
10. Its for the birds
11. CCNY, CSHL biologists find birdsong of isolates reverts to norm over several generations
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Why birds of a feather lek together
(Date:4/5/2017)... Today HYPR Corp. , leading innovator ... of the HYPR platform is officially FIDO® Certified ... architecture that empowers biometric authentication across Fortune 500 enterprises ... over 15 million users across the financial services industry, ... product suites and physical access represent a growing portion ...
(Date:4/3/2017)... 2017  Data captured by IsoCode, IsoPlexis ... a statistically significant association between the potency ... and objective response of cancer patients post-treatment. ... whether cancer patients will respond to CAR-T ... as to improve both pre-infusion potency testing and ...
(Date:3/30/2017)... , March 30, 2017 Trends, opportunities and ... and behavioral), by technology (fingerprint, AFIS, iris recognition, facial ... and others), by end use industry (government and law ... financial and banking, and others), and by region ( ... , Asia Pacific , and the ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... BioMedGPS announces expanded coverage of ... newest module, US Hemostats & Sealants. , SmartTRAK’s US Market for Hemostats and ... synthetic sealants and biologic sealants used in surgical applications. BioMedGPS estimates the market ...
(Date:10/11/2017)... ... ... Personal eye wash is a basic first aid supply for any work environment, but most ... you rinse first if a dangerous substance enters both eyes? It’s one less decision, and ... unique dual eye piece. , “Whether its dirt and debris, or an acid or alkali, ...
(Date:10/11/2017)... ... 11, 2017 , ... Disappearing forests and increased emissions are the main causes ... each year. Especially those living in larger cities are affected by air pollution related ... the most pollution-affected countries globally - decided to take action. , “I knew I ...
(Date:10/10/2017)... ... October 10, 2017 , ... For the ... won a US2020 STEM Mentoring Award. Representatives of the FirstHand program travelled to ... Experience from US2020. , US2020’s mission is to change the trajectory of STEM ...
Breaking Biology Technology: