Navigation Links
Male owls pitch their hoots to advertise body weight to competitors

Why do male owls hoot? Researchers from the Centre d'Études Biologiques de Chizé (France) and the University of Sussex (UK) have studied the vocal communication of male European Scops owls, one of the smallest living species of nocturnal raptors. The study, published in the April issue of the American Naturalist, was conducted between June 2003 and June 2005 on the isle of Oléron, off the west coast of France, where Christian Bavoux and Guy Burneleau have been studying the local scops owl population since 1981.

The authors have analyzed several hundreds of hoots recorded from 17 territorial males and demonstrated that the pitch of the vocalization reflects the body weight of the male: the heavier the male, the lower the pitch of his hoots. In order to see whether this information is actually used by male owls during territorial interactions, the authors conducted a series of playback experiments (commonly used in studies of animal communication in order to assess the function of vocal signals), monitoring the reaction of subjects to the broadcast of vocalizations. To do this they modified the pitch of several hoots, creating stimuli that mimicked the hoots given by males from a range of body weights. They then played back these recordings to males with established territories, and observed and quantified their response (a combination of approaches and vocal responses). The results show that male owls respond more strongly to the high-pitched calls that simulate lighter individuals, confirming that territorial males attend to pitch information advertising body weight in the calls of their competitors. The authors also found that the territory owners give slightly lower pitched hoots in response to calls mimicking heavier males, probably indicating that they attempted to sound heavier when challenged by more threatening individuals.

"The fact that owls are essentially active during the night puts a strong emphasis on acoustic communication as a means
'"/>

Source:University of Chicago Press Journals


Page: 1 2

Related biology news :

1. On the golf tee or pitchers mound, brain dooms motion to inconsistency
2. Mosquito repellents that emit high-pitched sounds dont prevent bites
3. Priming embryonic stem cells to fulfill their promise
4. Protein offers way to stop microscopic parasites in their tracks
5. Flocking together: Study shows how animal groups find their way
6. Where bacteria get their genes
7. Chickadees can help humans get their bearings
8. Bacteria use hosts immune response to their competitive advantage
9. Structures of marine toxins provide insight into their effectiveness as cancer drugs
10. Beauty queens urge girls not to sacrifice their bones
11. Researchers learn how blood vessel cells cope with their pressure-packed job
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Male owls pitch their hoots advertise body weight competitors

(Date:12/17/2014)... 15, 2014  HITLAB SM announced today its completion ... its adherence to current U.S. Food and Drug Administration ... smart device and smart phone application trials utilizing the ... "HITLAB is determined to improve global healthcare access, ...
(Date:12/11/2014)... , Dec. 09, 2014 Research and Markets ... ( http://www.researchandmarkets.com/research/twhjll/biometrics_market ) has announced the addition of ...  report to their offering. One major ... With continuous advances in technology, it is important to ...
(Date:12/10/2014)... RALEIGH, N.C. , Dec. 9, 2014  Valencell, a ... it is seeing a staggering demand from its licensees ... the Company revealed, is not solely coming from fitness ... as well. "A wearable is only as ...
Breaking Biology News(10 mins):HITLAB Completes GCP Audit for FDA Smart Device & App Compliance 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2Wearable Technology Products Demand Highly Accurate Biometric Technology 2
... the number of deer in forests and parks may ... in that area, new research suggests. A ... National Park Service found that higher deer activity is ... species of snakes, salamanders, and invertebrates studied, a greater ...
... the disparity between the numbers of African Americans living ... A study by researchers at the Johns Hopkins Bloomberg ... substantially reduced when comparing groups of African Americans and ... are published in the November 2008 print edition of ...
... release is available in German . , ... the yellow bananas are bright blue, as discovered by scientists ... York, USA). The team, headed by Bernhard Krutler, reports in ... is connected to the degradation of chlorophyll that occurs during ...
Cached Biology News:Snakes, salamanders and other creatures thrive in areas with higher deer populations 2Snakes, salamanders and other creatures thrive in areas with higher deer populations 3Hypertension disparity linked to environment 2Blue bananas 2
(Date:1/22/2015)... 22, 2015 Shimadzu Scientific Instruments ... multipurpose UV-visible spectrophotometer. Offering wavelength scanning from 190 ... ideal for applications in a variety of industries, ... The user-friendly UV-1280 enables intuitive operation, while the ...
(Date:1/22/2015)... The laboratory information management systems market is ... of technological advancements due to factors such as rising ... integrate healthcare systems, and increasing government support for adoption ... Key players in the market focus on technological advancements ...
(Date:1/22/2015)... Dr. Greg Leyer of UAS Labs recently was invited to ... on probiotics in San Diego, CA. , The Scripps ... health care professionals. This year’s pre-conference seminar was held on ... Dr. Leyer spoke about the emerging topics and science in ...
(Date:1/22/2015)... , Jan. 22, 2015   Cypher Genomics, ... Sequenom, Inc. (NASDAQ: SQNM ), the ... agreement for next generation noninvasive prenatal tests (NIPT). ... interpretation technology, called Mantis™, to advance analysis of ...
Breaking Biology Technology:Shimadzu’s New Monitored Single-Beam UV-Vis Spectrophotometer Offers Comprehensive Measurement Options in a Compact Body 2Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 2Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 3Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 4Cypher Genomics and Sequenom Announce Development Agreement 2Cypher Genomics and Sequenom Announce Development Agreement 3Cypher Genomics and Sequenom Announce Development Agreement 4
... Norlight Telecommunications , a Brookfield, Wisconsin, ... Protocol service for small and medium-sized businesses in Wisconsin ... to offer the service to businesses in Minnesota, Michigan, ... marketing. , , IPLive will integrate voice, data ...
... Groups IT shop, he wasnt coming into a crisis or ... IT organization with strong connections to the business and was ... big shoes to fill, Rick needed a sophisticated approach to ... that when you tie IT to financial services, the situation ...
... Despite all the financial and mental effort put ... will never get past a limited release or even ... further into the spotlight is the Wisconsin Innovation ... Whitewater-based division of the University of Wisconsin Extensions Small ...
Cached Biology Technology:CIO of CUNA Mutual Group talks on business-IT fusion 2CIO of CUNA Mutual Group talks on business-IT fusion 3UW-Whitewater center helps inventors get to market 2UW-Whitewater center helps inventors get to market 3UW-Whitewater center helps inventors get to market 4
JTV1 gene...
APO-BrdU™ TUNEL Assay Kit *with Alexa Fluor® 488 anti-BrdU* *60 assays*...
The FlowTACS Apoptosis Detection Kit is designed specifically for in situdetection of apoptotic...
Recombinant Rat PTX2/SAP...
Biology Products: