Navigation Links
Why you can't hurry love
Date:1/16/2009

Scientists have developed a mathematical model of the mating game to help explain why courtship is often protracted. The study, by researchers at UCL (University College London), University of Warwick and LSE (London School of Economics and Political Science), shows that extended courtship enables a male to signal his suitability to a female and enables the female to screen out the male if he is unsuitable as a mate.

The research, published this month in the Journal of Theoretical Biology, uses game theory to analyse how males and females behave strategically towards each other in the mating game. The mathematical model considers a male and a female in a courtship encounter of unspecified duration, with the game ending when one or other party quits or the female accepts the male as a mate. The model assumes that the male is either a ''good'' or a ''bad'' type from the female's point of view, according to his condition or willingness to care for the young after mating. The female gets a positive payoff from mating if the male is a ''good'' male but a negative payoff if he is ''bad'', so it is in her interest to gain information about the male's type with the aim of avoiding mating with a "bad" male. In contrast, a male gets a positive payoff from mating with any female, though his payoff is higher if he is "good" than if he is "bad".

The study looks for evolutionarily stable equilibrium behaviours, in which females are doing as well as they can against male behaviour and males are doing as well as they can against female behaviour. It shows that extended courtship can take place, with a good male being willing to court for longer than a bad male and the female delaying mating. In this way the duration of a male's courtship effort carries information about his type. By delaying mating, the female is able to make some use of this information to achieve a degree of screening. Because bad males have a greater tendency to quit the courtship game early, as time goes on and the male has not quit it becomes increasingly probable that he is a "good" male.

Professor Robert Seymour, UCL Mathematics, says: "Courtship in a number of animal species occurs over an extended period of time. Human courtship, for example, can involve a sequence of dinners, theatre trips and other outings lasting months or even years. One partner - often the male - may pay the greater part of the financial cost, but to both sexes there is a significant cost of time which could be spent on other productive activities. Why don't people and other animals speed things up to reduce these costs? The answer seems to be that longer courtship is a way for the female to acquire information about the male.

"By delaying mating, the female is able to reduce the chance that she will mate with a bad male. A male's willingness to court for a long time is a signal that he is likely to be a good male. Long courtship is a price paid for increasing the chance that mating, if it occurs, will be a harmonious match which benefits both sexes. This may help to explain the commonly held belief that a woman is best advised not to sleep with a man on a first date."

Dr Peter Sozou, Warwick Medical School and LSE Centre for Philosophy of Natural and Social Science, says: "From a female's point of view, males are not all equal. A female would like to mate with a good male, but cannot tell a male's type from his appearance alone. The strategic problem the female faces is how to screen out bad males, and this is where long courtship comes into play. A male is assumed to always want to mate with a female, but a good male is more willing to pay the cost of a long courtship in order to claim the prize of mating. This leads to an outcome in which the female is not willing to mate immediately, but instead requires the male to wait for an indeterminate time before she agrees to mate with him. During this time, the male may give up on courting the female.

"Bad males give up at some random time if the female has not by then mated with them, but good males are more persistent and do not give up. The female's strategy is a compromise - a trade-off between on the one hand the greater risk of mating with a bad male if she mates too quickly, and on the other hand the time cost of delay. Under this compromise there remains some risk that she will mate with the wrong type of male. She cannot eliminate this risk completely unless she decides never to mate."


'/>"/>

Contact: Jenny Gimpel
j.gimpel@ucl.ac.uk
44-020-767-99726
University College London
Source:Eurekalert

Related biology news :

1. Increase in ethanol production from corn could significantly impact
2. Endobronchial valve significantly improves emphysema
3. First-ever study: lack of critical lubricant causes wear in joints
4. New Actemra data shows significant benefit for patients suffering from rheumatoid arthritis
5. Columbia researchers: Growth of CT scan use may lead to significant public health problem
6. Stanford researchers say climate change will significantly increase impending bird extinctions
7. M2SYS Introduces Revolutionary Biometric Artificial Intelligence Technology to Significantly Reduce Fingerprint Software False Reject Rates
8. Streams remove significant amounts of nitrogen, preventing downstream dead zones
9. New type of drug shrinks primary breast cancer tumors significantly in just 6 weeks
10. In computer models and observations, researchers see potential for significant red tide season
11. Center for Computer Forensics Offers Expert to Volunteer as CFCE Certification Applicants Coach
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/5/2016)...  The Office of Justice Programs, National Institute ... Enhance or Replace Medico Legal Autopsies?" on NIJ.gov.  ... replacing forensic autopsies with postmortem X-ray computed tomography, ... response to recommendations made by The National Academy ... as a potential component of medicolegal death investigations. ...
(Date:11/29/2016)... BOSTON , Nov. 29, 2016 BioDirection, ... rapid point-of-care products for the objective detection of concussion ... the company has successfully completed a meeting with the ... company,s Tbit™ blood test Pre-Submission Package. During the meeting ... Tbit™ system as a precursor to commencement of a ...
(Date:11/22/2016)... 22, 2016 According to the new market research ... Face, Vein, Signature, Voice), Multi-Factor), Component (Hardware and Software), Function (Contact and ... the market is expected to grow from USD 10.74 Billion in 2015 ... between 2016 and 2022. Continue Reading ... ...
Breaking Biology News(10 mins):
(Date:12/9/2016)... ... , ... There’s a winning streak at Voxx Analytics: the tech company has ... the award last year as well. Employees nominate their companies for the honor, and ... to the tech company’s upbeat environment as a reason. “We don’t answer to Wall ...
(Date:12/9/2016)... KONG , Dec. 9, 2016 China Cord ... "Company"), China,s leading provider of cord ... cell storage services, today announced the results of its 2016 ... in Hong Kong S.A.R., China . ... ratified the re-appointment of KPMG Huazhen LLP as ...
(Date:12/8/2016)... La Jolla, CA (PRWEB) , ... December 08, 2016 , ... ... that 2016 was a banner year for team building events, new program offerings and ... focus, which it expanded earlier this year to include groups of over 30 people. ...
(Date:12/8/2016)... DIEGO , Dec. 8, 2016  Renova™ ... for congestive heart failure and type 2 diabetes, ... for a novel adeno-associated virus (AAV) vector developed ... , M.D., Ph.D., at Stanford University. The company ... its paracrine gene therapy product pipeline. ...
Breaking Biology Technology: