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, it led to a kind of self-domestication, resulting in a group-living species of provisioning males and faithful females," he said.

The study reveals that female choice played a crucial role in human evolution and that future studies should include between-individual variation to help explain social dilemmas and behaviors, according to Gavrilets.


'/>"/>

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

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:6/15/2016)... , June 15, 2016 ... report titled "Gesture Recognition Market by Application Market - Global Industry ... - 2024". According to the report, the  global gesture ... in 2015 and is estimated to grow at ... billion by 2024.  Increasing application of ...
(Date:6/3/2016)... LONDON , June 3, 2016 /PRNewswire/ ... Transport Management) von Nepal ... ,Angebot und Lieferung hochsicherer geprägter Kennzeichen, einschließlich ... weltweit führend in der Produktion und Implementierung ... an der Ausschreibung im Januar teilgenommen, aber ...
(Date:6/1/2016)... Favorable Government Initiatives Coupled With ... Identification to Boost Global Biometrics System Market Through 2021  ... report, " Global Biometrics Market By Type, By ... 2011 - 2021", the global biometrics market is projected ... of growing security concerns across various end use sectors ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... ... June 27, 2016 , ... Cancer experts from ... believe could be a new and helpful biomarker for malignant pleural mesothelioma. Surviving ... to read it now. , Biomarkers are components in the blood, tissue ...
(Date:6/27/2016)... N.C. (PRWEB) , ... June 27, 2016 , ... ... commercial operations for Amgen, will join the faculty of the University of ... as adjunct professor of strategy and entrepreneurship at UNC Kenan-Flagler, with a focus ...
(Date:6/24/2016)... on a range of subjects including policies, debt and investment ... Speaking at a lecture to the Canadian Economics ... the country,s inflation target, which is set by both the ... "In certain areas there needs to be frequent ... not sit down and address strategy together?" He ...
(Date:6/24/2016)... NC (PRWEB) , ... June 24, 2016 , ... Researchers ... the most commonly-identified miRNAs in people with peritoneal or pleural mesothelioma. Their findings are ... to read it now. , Diagnostic biomarkers are signposts in the blood, lung ...
Breaking Biology Technology: