Navigation Links
Females can place limits on evolution of attractive features in males, research shows
Date:8/4/2011

the calls become more elaborate.

"We have shown that the female tngara frog brains have evolved to process some kinds of information and not others," says Mike Ryan, professor of integrative biology at The University of Texas at Austin, "and that this limits the evolution of those signals."

Imagine looking at a group of five oranges next to a group of six. At a glance, you would quickly notice that one group has one more orange than the other. Now, imagine looking at a pile of 100 oranges next to a pile of 101. It would be nearly impossible for you to notice the difference in size (one orange) between those two piles at a glance. This is known as Weber's Law, which states that stimuli are compared based on proportional differences rather than absolute differences (one orange in the case above).

In tngara frogs, males gather en masse to attract female frogs with a call that is made up of a longer "whine" followed by one or more short "chucks."

Through a series of experiments conducted in Panama, Ryan and his collaborators found that females prefer male calls with the most chucks, but their preference was based on the ratio of the number of chucks. As males elaborate their call by adding more chucks, their relative increase in attractiveness decreases due to a perceptual constraint on the part of females.

Male tngara frog calls also attract a predator: the frog eating fringe-lipped bat. To confirm that male song elaboration wasn't limited by these predators, the researchers also studied how the bats respond to additional "chucks" in the male call.

They discovered that hunting bats choose their prey based on chuck number ratio, just as the female frogs do. So, as males elaborate their call by adding chucks, the relative increase in predation risk decreases with each additional chuck.

"What this tells us is that predation risk is unlikely to limit male call evolution," says Karin Akre, lecturer
'/>"/>

Contact: Karin Akre
kakre@mail.utexas.edu
512-475-6164
University of Texas at Austin
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Avian Axe effect attracts attention of females and males
2. Competition between females leads to infanticide in some primates
3. In fireflies, flightless females lose out on gifts from males
4. Differences in brain development between males and females may hold clues to mental health disorders
5. Male antelopes trick females into extra sex opportunities
6. Male antelopes deceive females to increase their chances of mating
7. Females shut down male-male sperm competition in leafcutter ants
8. Pesticide atrazine can turn male frogs into females
9. Exposure to young triggers new neuron creation in females exhibiting maternal behavior
10. Pesky fruit flies learn from experienced females: Study
11. Caffeine appears to be beneficial in males -- but not females -- with Lou Gehrigs disease
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Females can place limits on evolution of attractive features in males, research shows
(Date:4/14/2015)... YORK , April 14, 2015  HYPR ... IDentity Online (FIDO ® ) Alliance tm , ... specifications. FIDO members commit to share technology and ... methods that are interoperable, more secure and private, ... enable biometric identity verification that protects sensitive user ...
(Date:4/13/2015)... , April 13, 2015  higi, a leading ... ways to more fully engage with their communities around ... industry-leading, privacy protected and secure API.  ... enables the most accessible, affordable, and convenient vehicle to ... The API will allow ...
(Date:4/8/2015)... 8, 2015  Infinisource, a leading provider of SaaS-based ... Morpho, a leading supplier of biometric identification and ... market,s most advanced biometrically-enabled time clock, the companies ... clock is setting a bold, new standard for ... the small and mid-size employer. When connected to ...
Breaking Biology News(10 mins):HYPR Corp. Joins the FIDO Alliance 2HYPR Corp. Joins the FIDO Alliance 3higi Launches Seamless Access to HIPAA-Compliant Health Outcomes and Activity Data 2higi Launches Seamless Access to HIPAA-Compliant Health Outcomes and Activity Data 3iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 2iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 3
... new study by researchers at the University of California, ... that promoting cleaner, more efficient technologies for producing charcoal ... significant climate change and development benefits. , The African ... and Latin America, is dependent on both wood and ...
... Linus Pauling's book Vitamin C and The Common Cold, published ... believe in the value of the vitamin for cold prevention ... reviewing all of the best clinical research on this topic, ... unjustified. , Robert M Douglas of the Australian National University, ...
... critical piece of synapse-associated protein 97 (SAP97) found in abundance ... play a role in everything from cardiac contractions to memory ... , Dale Mierke, associate professor of medical science at Brown, ... is an important step. Now that part of the protein's ...
Cached Biology News:Study of energy and health in Africa focuses spotlight on charcoal and forest management 2Study of energy and health in Africa focuses spotlight on charcoal and forest management 3Does vitamin C help prevent or treat the common cold? Maybe not, after all. 2Researchers reveal secret of key protein in brain and heart function 2
(Date:4/16/2015)...  In recognition of World Hemophilia Day, Biogen  (NASDAQ: ... illuminate more than 15 prominent landmarks red throughout ... Zakim Bridge and Prudential Tower, Chicago,s ... Superdome and Denver,s Coors Field ... 17, and coincide with hemophilia community events in a dozen ...
(Date:4/16/2015)... April 16, 2015 ... pharmaceutical investment and R&D group, and Lancet, ... research, development and commercialization of new medicines ... the intention to stimulate the innovative development ...      (Logo: http://photos.prnewswire.com/prnh/20150416/739742-a) ,     (Logo: http://photos.prnewswire.com/prnh/20150416/739742-b) , ...
(Date:4/16/2015)... , April 16, 2015 Avelas Biosciences, ... to improving cancer surgeries, announced today that it has ... cancer illuminator, AVB-620, in women with primary, non-recurrent breast ... company also welcomed the addition of Steven Chen ... The open label, dose escalation study will enroll ...
(Date:4/16/2015)... (PRWEB) April 16, 2015 Fairleigh ... Joseph V. Gulfo to become the Executive Director ... Simultaneously, FDU announced the kick-off of the Initiative ... spearheaded by Dr. Gulfo, under the Rothman Institute ... of Business) and in collaboration with FDU’s School ...
Breaking Biology Technology:Biogen Shines A Light On Hemophilia Community By Illuminating U.S. Landmarks Red On World Hemophlia Day 2Biogen Shines A Light On Hemophilia Community By Illuminating U.S. Landmarks Red On World Hemophlia Day 3Biogen Shines A Light On Hemophilia Community By Illuminating U.S. Landmarks Red On World Hemophlia Day 4Lancet and ChemRar High Tech Center Have Announced a Partnership in the Development and Production of Novel Drugs in Russia 2Avelas Biosciences Initiates Phase 1b Trial of AVB-620 in Breast Cancer Patients 2Avelas Biosciences Initiates Phase 1b Trial of AVB-620 in Breast Cancer Patients 3Dr. Joseph V. Gulfo Named Executive Director of Fairleigh Dickinson University’s Rothman Institute to Spearhead New Initiative for Patient-Centered Innovation (iPCI) 2Dr. Joseph V. Gulfo Named Executive Director of Fairleigh Dickinson University’s Rothman Institute to Spearhead New Initiative for Patient-Centered Innovation (iPCI) 3
... 18 Premier Research Group plc (AIM:,PRG) announces ... Vice President,Global Human Resources. Mr. Keenen will be ... related to maximizing the,effectiveness of Premier Research,s people ... Dr. Troy McCall, COO, commented: "We are ...
... Ultra-low power DSP core from CEVA provides unmatched ... for state-of-the-art cochlear implant system, SAN JOSE, ... ; LSE: CVA), a leading licensor of innovative ... wireless, consumer and,multimedia applications, today announced that Advanced ...
... TOKYO, September 18 Sosei Group Corporation,("Sosei"; TSE ... AD 337, an enantiomer of an approved, centrally ... of principle trial,for the treatment of fibromyalgia syndrome ... placebo,controlled, parallel group exploratory study, investigated the efficacy,safety ...
Cached Biology Technology:Premier Research Appoints Global Head of Human Resources 2Advanced Bionics Deploys CEVA-TeakLite(TM) DSP Core to Enhance Its Harmony(TM) HiResolution(R) Bionic Ear System 2Advanced Bionics Deploys CEVA-TeakLite(TM) DSP Core to Enhance Its Harmony(TM) HiResolution(R) Bionic Ear System 3Sosei Announces Completion of Phase II Trial of AD 337 in Fibromyalgia Syndrome 2
... & visualization software. See ... samples. Combine Sequest and ... confidence. Get more detailed ... your MS/MS experiments.14 day ...
TRIzol Reagents are ready-to-use monophasic solutions of phenol and guanidine isothiocyanate suitable for isolating total RNA DNA and proteins (16)....
...
...
Biology Products: