Navigation Links
Cultural evolution changes bird song
Date:1/29/2013

Thanks to cultural evolution, male Savannah sparrows are changing their tune, partly to attract "the ladies."

According to a study of more than 30 years of Savannah sparrows recordings, the birds are singing distinctly different songs today than their ancestors did 30 years ago changes passed along generation to generation, according to a new study by University of Guelph researchers.

Integrative biology professors Ryan Norris and Amy Newman, in collaboration with researchers at Bowdoin College and Williams College in the U.S., analyzed the songs of male Savannah sparrows (Passerculus sandwichiensis) recorded over three decades, and found that the songs had changed distinctly from 1980 to 2011.

"The change is the result of cultural transmission of different song elements through many generations," said Norris.

Norris added that the change in tune resembles changes in word choice and language among humans.

AUDIO: This is a Savannah sparrow song from 1980. The song would change from generation to generation, as a result of cultural evolution.

Click here for more information.

"If you listen to how people used to talk in the 1890s and how we talk today, you would notice major differences, and this is the result of shifts in culture or the popularity of certain forms," he said. "The change in sparrow songs over time has occurred much the same way"

The sparrows, which live on Kent Island, N.B., in the Bay of Fundy, can generally sing only one song type that consists of several parts. Male sparrows learn that song early in their first year and continue to sing the same tune for the rest of their lives.

"Young male sparrows learn their songs from the birds around them," said Norris. "It may be their fathers, or it could be other older male birds that live nearby."

Each male sparrow has his own unique sound, added Newman.

"While the island's sparrows all sing a characteristic 'savannah sparrow song,' with the same verses and sound similar, there are distinct differences between each bird," she said. "Essentially, it is like karaoke versions of popular songs. It is the rise and fall in popular cover versions that has changed over time."

The research team found that, in general, each song has three primary elements. The first identifies the bird as a Savannah sparrow, the second identifies which individual is singing, and the third component is used by females to assess males.

Using sonograms recorded from singing males each breeding season, the researchers determined that, while the introductory notes had stayed generally consistent for the last 30 years, the sparrows had added a series of clicks to the middle of their songs. The birds had also changed the ending trill: once long and high-frequency, it is now shorter and low-frequency.

"We found that the ending trill of the song has become shorter, likely because female sparrows preferred this, because males with shorter trills had higher reproductive success," Norris said.

Kent Island has been home to the Bowdoin Scientific Station since it was donated by J. Sterling Rockefeller in 1932, and the birds have been recorded since the 1980s. Individual birds are also monitored throughout their lifetime.

"We know the identity and history of every single sparrow in the study population" said Norris, who has led the project with Newman since 2009. "To have 30 years of recordings is very rare, and it was definitely surprising to see such drastic changes."


'/>"/>
Contact: Ryan Norris
rnorris@uoguelph.ca
519-824-4120 x56300
University of Guelph
Source:Eurekalert  

Related biology news :

1. Agricultural bacteria: Blowing in the wind
2. Culturally sensitive research in United Arab Emirates pinpoints indoor air quality risks
3. Discovery of plant proteins may boost agricultural yields and biofuel production
4. Agricultural expert outlines path for developing nations to double food production, meet 2050 demand
5. Screening horticultural imports: New models assess plant risk through better analysis
6. Horticultural hijacking
7. Study details essential role of trust in agricultural biotech partnerships
8. USDA study shows trends in public and private agricultural R&D
9. Cultural anthropologist Mark Flinn named 2013 AAAS Fellow
10. New book details the biological and cultural diversity of Khawa Karpo, sacred mountain of Tibet
11. Agricultural, health education goes global via cellphone animations
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Cultural evolution changes bird song
(Date:6/9/2016)... 2016  Perkotek an innovation leader in attendance control systems is proud to announce ... for employers to make sure the right employees are actually signing in, and to ... ... ... ...
(Date:6/2/2016)...   The Weather Company , an IBM Business (NYSE: ... capability in which consumers will be able to interact with ... via voice or text and receive relevant information about the ... Marketers have long sought an advertising solution that can create ... relevant and valuable; and can scale across millions of interactions ...
(Date:5/16/2016)... NEW YORK , May 16, 2016   ... authentication solutions, today announced the opening of an IoT ... to strengthen and expand the development of embedded ... provides an unprecedented level of convenience and security with ... to authenticate one,s identity aside from DNA. EyeLock,s platform ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... June 24, 2016 Epic Sciences unveiled ... cancers susceptible to PARP inhibitors by targeting homologous ... (CTCs). The new test has already been incorporated ... multiple cancer types. Over 230 clinical ... response pathways, including PARP, ATM, ATR, DNA-PK and ...
(Date:6/23/2016)... (PRWEB) , ... June 23, 2016 , ... ... is pleased to announce the launch of their brand, UP4™ Probiotics, into Target ... over 35 years, is proud to add Target to its list of well-respected ...
(Date:6/23/2016)... 2016 Houston Methodist Willowbrook Hospital has ... Association to serve as their official health care ... Willowbrook will provide sponsorship support, athletic training services, ... coaches, volunteers, athletes and families. "We ... Association and to bring Houston Methodist quality services ...
(Date:6/23/2016)... FRANCISCO , June 23, 2016   EpiBiome ... has secured $1 million in debt financing from Silicon ... ramp up automation and to advance its drug development ... its new facility. "SVB has been an ... beyond the services a traditional bank would provide," said ...
Breaking Biology Technology: