Female Choice for Monogamy – Crucial in Human Evolution


English: Human evolution scheme

Bad behaviour of ‘alpha males’ encouraged women to form monogamous relationships (Photo credit:Wikipedia)

NEW RESEARCH has suggested that the raucous and  aggressive behaviour of ‘alpha males’ in early human evolution was a major turn-off for women – who then opted for quieter partners who were better devoted to raising children. 

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.

Journal reference: Proceedings of the National Academy of Sciences

Provided by National Institute for Mathematical and Biological Synthesis (NIMBioS)

Article at : http://phys.org/news/2012-05-faithful-females-good-key-evolutionary.html

Advertisements

About Georges Abi-Aad

CEO, electronic engineer with MBA in marketing. Multicultural; French citizen born in Lebanon working in the Middle East and fluent in French, English and Arabic. I have more than 30 years of proven experience in the Middle East with European know how. I am good in reorganization and in Global strategic management business. I am a dependable leader with an open approach in working with people, forging a strong team of professionals dedicated to the Company and its clientele. Perseverance is my key word. Married to Carole and having 2 children: Joy-Joelle and Antoine (Joyante!).
This entry was posted in Technology and tagged , , , , , , , , , . Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s