Navigation Links
Why the swamp sparrow is hitting the high notes
Date:1/9/2009

CORAL GABLES, FL (January 09, 2008)--Birdsongs are used extensively as models for animal signaling and human speech, offering a glimpse of how our own communicating abilities developed. A new study by Adrienne DuBois, a graduate student at the University of Miami (UM) College of Arts and Sciences Department of Biology, shows that the Swamp Sparrow has the ability to emit songs that are physically difficult to produce during hostile situations, implying that songbirds use sophisticated vocal performances as signals in aggressive communication. The findings contribute to the current understanding of how animals use signals to communicate.

AUDIO: The slow trills of the swamp sparrows can be heard during spring and summer across the Eastern and Central North American wetlands.

Click here for more information.

The study published online in Biology Letters is entitled Swamp Sparrows Modulate Vocal Performance in an Aggressive Context. DuBois investigated whether vocal performance (a measure of how well a male sings songs that are difficult to produce) is used as a signal in aggressive interactions between male songbirds. The study reveals that, when challenged, the male Swamp Sparrow escalates its vocal performance by increasing the frequency range and the speed of its song.

"Vocal performance was thought to be a static characteristicset once a song is learned," DuBois said. "Our results are the first to show that songbirds can modulate vocal performance, when it is important to do so."

Theoretically, only males with better genes, or that are in better condition, should be able to produce high performance songs. However, the study found that males are able to increase their vocal performance when challenged by a competitor, explained Bill Searcy, Maytag professor of Ornithology in the UM College of Arts and Science and co-author of the study.

"Even in the case of signals whose properties are physically constrained to reflect an individual's abilities, animals exaggerate their signals as much as they can, during critical situations," Searcy said.

The slow trills of the Swamp Sparrows can be heard during spring and summer across the Eastern and Central North American wetlands. This small songbird with a grey face and reddish wings defends his territory and attracts a mate usually by singing from a raised perch in a brushy swamp.

Results from research on birdsong can be extrapolated to other areas of study, including the evolution of communication, and animal cognition, explained Steve Nowicki, Duke University professor, dean of Undergraduate Education and co-author of the study.

"By understanding what animals do in their natural environment, we get a glimpse of what their brains can do," said Nowicki, "In a broader sense, we can make assumptions about the way the animal brain develops to support a complex communication system."


'/>"/>

Contact: Marie Guma-Diaz
m.gumadiaz@umiami.edu
305-284-1601
University of Miami
Source:Eurekalert  

Related biology news :

1. Swamping bad cells with good in ALS animal models helps sustain breathing
2. For migrating sparrows, kids have a compass, but adults have the map
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Why the swamp sparrow is hitting the high notes
(Date:2/8/2017)... About Voice Recognition Biometrics Voice recognition biometrics ... a stored voiceprint template. Acoustic features of an ... are compared to distinguish between individual voices. Voice ... PCs already have a microphone and can authenticate ... are most likely to be deployed in telephone-based ...
(Date:2/8/2017)... , Feb. 7, 2017 The biometrics ... by the confluence of organizations, desires to better ... knowledge-based systems (password and challenge questions), biometrics is ... government systems. The market is driven by use ... between consumer and enterprise uses cases, with consumer-facing ...
(Date:2/7/2017)... Zimmer Biomet Holdings, Inc. (NYSE and SIX: ... at the LEERINK Partners 6th Annual Global Healthcare Conference ... February 15, 2017 at 10 a.m. Eastern Time. ... be accessed at http://wsw.com/webcast/leerink28/zbh .  The webcast will ... Biomet,s Investor Relations website at http://investor.zimmerbiomet.com . ...
Breaking Biology News(10 mins):
(Date:2/23/2017)... Atlanta, it seems everyone has a chance to express their ... expressive and dynamic community unlike any other. The businesses that ... With their newest salon in ... on that tradition with a unique, fresh approach to head ... the newest of 13 nationwide locations, each of them well-situated ...
(Date:2/23/2017)... , Feb. 23, 2017  Imanis Life Sciences ... line of oncolytic vaccinia viruses for virotherapy research. ... part of Genelux,s proprietary, vaccinia virus-based technology platform ... to enter into a partnership with Genelux to ... vaccinia viruses for use in research," said Dr. ...
(Date:2/23/2017)... ... February 23, 2017 , ... ... that in a published evaluation of multiple immunoassay-based threat detection technologies by ... Energy Laboratory, PathSensors’ CANARY® biosensor threat detection technology was found to have ...
(Date:2/23/2017)... ... February 23, 2017 , ... Today, ... cortisol, CRP, adiponectin, uric acid, and/or other biomarkers or SNPs of interest) using ... Salimetrics’ SalivaLab , the relationship between insulin and other relevant biomarkers can ...
Breaking Biology Technology: