Navigation Links
Family values
Date:5/28/2012

In early human evolution, when faithful females began to choose good providers as mates, pair-bonding replaced promiscuity, laying the foundation for the emergence of the institution of the modern family, a new study finds.

The study helps answer long-standing questions in evolutionary biology about how the modern family, characterized by intense, social attachments with exclusive mates, emerged following earlier times of promiscuity. In addition to the establishment of stable, long-lasting relationships, the transition to pair-bonding was also characterized by a reduction in male-to-male competition in favor of providing for females and providing close parental involvement.

The study demonstrates mathematically that the most commonly proposed theories for the transition to human pair-bonding are not biologically feasible. However, the study advances a new model showing that the transition to pair-bonding can occur when female choice and faithfulness, among other factors, are included. The result is an increased emphasis on provisioning females over male competition for mating.

The effect is most pronounced in low-ranked males who have a low chance of winning a mate in competition with a high-ranked male. Thus, the low-ranked male attempts to buy mating by providing for the female, which in turn is then reinforced by females who show preference for the low-ranked, "provisioning" male, according to author Sergey Gavrilets, associate director for scientific activities at the National Institute for Mathematical and Biological Synthesis and a professor at the University of Tennessee-Knoxville.

"Once females begin to show preference for being provisioned, the low-ranked males' investment in female provisioning over male-to-male competition pays-off," Gavrilets explained.

Gavrilets says that the study's results describe a "sexual revolution" initiated by low-ranking males who began providing in order to get matings. "Once the process was underway,
'/>"/>

Contact: Catherine Crawley
ccrawley@nimbios.org
865-974-9350
National Institute for Mathematical and Biological Synthesis (NIMBioS)
Source:Eurekalert

Page: 1 2

Related biology news :

1. Queens University Belfast researchers trace octopuses family tree
2. Children distressed by family fighting have higher stress hormones
3. Planetary "first family" discovered by astronomers using Gemini and Keck Observatories
4. Planetary first family discovered by astronomers using Gemini and Keck Observatories
5. Making the ultimate family sacrifice
6. Microscopic morphology adds to the scorpion family tree
7. Mayo Clinic researchers suspect a novel gene is causing restless legs syndrome in a large family
8. Regular family meals result in better eating habits for adolescents
9. Early family ties: No sponge in the human family tree
10. Rotator cuff tears: Are they all in the family?
11. Late motherhood boosts family lifespan
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/25/2014)... people lived on the land now called California, and ... availability of plants they used for food, fuel, tools, ... maintain desired habitat and natural resources. , Frank Lake, ... Station, will lead a field trip to ... Society of America,s 99th Annual Meeting, in Sacramento, Cal. ...
(Date:7/25/2014)... scientists from 25 countries and 35 states will ... the Genetics Society of America (GSA) next week ... conference will feature close to 500 presentations (including ... including gene expression and regulation, functional genomics, chemical ... and a variety of diseases. , Of ...
(Date:7/25/2014)... central nervous system disease that is caused by ... the embryonic phase. Many patients have varying degrees ... retardation. Such problems decrease the patients, functional independence ... Physical Medicine and Rehabilitation Education and Research Hospital, ... SB, using the Pediatric Evaluation of Disability Inventory ...
Breaking Biology News(10 mins):Fire ecology manipulation by California native cultures 2Fire ecology manipulation by California native cultures 3Yeast meeting to showcase latest breakthroughs in genetics and molecular biology 2
... For thousands of years, people have believed that eating ... stronger muscles. Take Milo of Croton, the winner of five ... ancient writers are to be believed, he built his crushing ... day. No modern athlete would go to such extremes, ...
... Early in development infants of many species experience important ... of their mother to start exploring the wider world. ... brain during that turning point. Based on animal ... of attachments in many speciesincluding the conundrum of why ...
... different anti-apoptotic proteins support cancer cell survival via an ... drugs, report Brunelle et al. The study will be ... 2, 2009 print issue of the Journal of ... dependent on one or more anti-apoptotic proteins to avoid ...
Cached Biology News:Moderate amounts of protein per meal found best for building muscle 2Changes in brain chemicals mark shifts in infant learning 2Changes in brain chemicals mark shifts in infant learning 3Chemosensitivity of cancer cells depends on their protein dependency 2
(Date:7/24/2014)... RIDGE, Tenn., July 24, 2014 -- A novel combination ... the Department of Energy,s Oak Ridge National Laboratory an ... for its unusual physical and electrochemical properties. , ... how oxygen affects the surface of a perovskite manganite, ... behavior. The new avenue to understand surface behavior could ...
(Date:7/24/2014)... July 24, 2014  ECC West Africa, LLC (ECC) ... with University College Hospital (UCH) Ibadan Board of ... to finance, design, construct, and operate and maintain a ... . Under the first of the 4-phase project, ... and funding applications. UCH Ibadan intends to finance and ...
(Date:7/24/2014)... Yan, Distinguished Professor of Engineering at the University ... to solve problems in energy engineering, environmental sustainability ... on zeolites, porous rock with a well-defined, crystalline ... is so precisely decided that zeolites can separate ... of an angstrom (one-tenth of a nanometer), making ...
(Date:7/24/2014)... July 24, 2014 Your cell ... in modeling lithium-ion battery storage capacity. , New ... a theoretical model created at Lawrence Livermore ... that predicts how carbon components will perform as ... emphasizes the urgent need for higher-performance batteries. Several ...
Breaking Biology Technology:ORNL study reveals new characteristics of complex oxide surfaces 2ECC Signs a Contract for the Finance, Design, and Construction of a Premier Cancer Institute in Ibadan, Nigeria 2University of Delaware researcher describes new approach for creating organic zeolites 2Getting More Life out of Lithium-ion Batteries 2
... Nov. 25 CAS REGISTRY, the world,s most,authoritative collection ... and inorganic substances. CAS Registry Number(R),1073662-18-6 recently was assigned ... (Photo: http://www.newscom.com/cgi-bin/prnh/20081125/CLTU095 ) , ... ) , The ...
... MNKD ), focused on discovering, developing and commercializing,treatments for ... Piper Jaffray 20th Annual Health Care Conference on Tuesday, December ... Hotel in New York City. , ... live web cast of the,presentation in the Investor Relations section ...
... SGMO ) announced today that Edward Lanphier, ... progress of Sangamo,s ZFP Therapeutic,development programs and an overview ... Tuesday, December 2, 2008 at the Piper Jaffray 20th ... will also update the,financial community on its latest developments ...
Cached Biology Technology:CAS Registers 40 Millionth Substance in CAS REGISTRY(SM) 2Sangamo BioSciences to Webcast Annual Investor and Analyst Briefing and Presentation at Piper Jaffray Health Care Conference 2
... Cellular uptake of long double stranded RNA ... interference in a diverse group of organisms ... RNA interference leads to the inhibition of ... of the target messenger RNA (mRNA). Attempts ...
... Bruker Daltonics and Bruker BioSpins ... for metabolism studies, and analysis of ... ESI-TOF system, an optional Avance NMR ... acquisition, evaluation and statistical analysis for ...
... Tracker w/ OutputCumulates a score of movement counts, ... that it.can track up to 6 subjects at ... be triggered. Can outpt a sync pulse ... Can use animal location and timing information ...
... GEA Diessel fermentation systems for cultivation ... have provided manufacturers of bio-pharmaceutical products maximum ... years. For microbial and cell fermentation 10 ... of dead-leg areas ,*Fully automated control ...
Biology Products: