Navigation Links
Bonobos' unusual success story

This release is available in German.

Mate competition by males over females is common in many animal species. During mating season male testosterone levels rise, resulting in an increase in aggressive behavior and masculine features. Male bonobos, however, invest much more into friendly relationships with females. Elevated testosterone and aggression levels would collide with this increased tendency towards forming pair-relationships.

Bonobos are among the closest living relatives of humans. Like other great apes they live in groups made up of several males and females. Contrary to other ape species however, male bonobos do not, in general, outrank female individuals and do not dominate them in mating contexts. This constellation suggests that the selection for typically masculine behavioral patterns like aggression, dominance and intrasexual competition are met with antagonistic forces: On one hand it is advantageous if a male outcompetes a fellow male. This, however, implies that there is increased aggression and an elevated level of testosterone in high-ranking males. On the other hand as dominance relations between the sexes are rather balanced in bonobos it is likely that males benefit from having friendly pair-relationships with female individuals. Studies with birds and rodents show that a tendency towards forming pair-relationships correlates with lower male aggression rates and testosterone levels.

In a current study, Martin Surbeck, Gottfried Hohmann, Tobias Deschner and colleagues of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, found that in wild bonobos high-ranking males were more aggressive and their mating success was higher when compared to lower-ranking males. Contrary to other species in which males compete fiercely over access to females, there was no correlation between dominance status or aggression with testosterone levels. In addition, the researchers found that high-ranking males invested more often than lower-ranking group members into friendly relationships with females. This suggests that these friendly relationships between the sexes are associated with lower male testosterone levels.

"Our study suggests that in bonobos as in in humans intersexual friendships result in hormonal patterns that we know from species in which male individuals are actively participating in raising their young and in which the two sexes enter lasting pair-relationships", says Martin Surbeck.


Contact: Dr. Tobias Deschner

Related biology news :

1. Despite peacenik reputation, bonobos hunt and eat other primates too
2. Unusual use of toys in infancy a clue to later autism
3. Researchers study virus with unusual properties
4. Properties of unusual virus revealed in research
5. Unusual microbial ropes grow slowly in cave lake
6. Unusual protein modification involved in muscular dystrophy, cancer
7. Virus infection may trigger unusual immune cells to attack nerves in multiple sclerosis
8. Unusual rhino beetle behavior discovered
9. Expedition to Mid-Cayman Rise identifies unusual variety of deep sea vents
10. Clue to unusual drug-resistant breast cancers found
11. Dairy farmer finds unusual forage grass
Post Your Comments:
Related Image:
Bonobos' unusual success story
(Date:11/19/2015)... 19, 2015  Although some 350 companies are actively ... a few companies, according to Kalorama Information. These include Roche ... the market share of the 6.1 billion-dollar molecular testing ... Market for Molecular Diagnostic s .    ... still controlled by one company and only a handful ...
(Date:11/17/2015)... , November 17, 2015 ... 19 novembre  2015.  --> Paris , ... --> DERMALOG, le leader de l,innovation biométrique, a ... fois passeports et empreintes sur la même surface de ... passeports et l,autre pour les empreintes digitales. Désormais, un ...
(Date:11/12/2015)... , Nov. 12, 2015  A golden retriever ... Duchenne muscular dystrophy (DMD) has provided a new lead ... Children,s Hospital, the Broad Institute of MIT and Harvard ... Brazil . Cell, pinpoints ... dogs "escape" the disease,s effects. The Boston Children,s lab ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... ... 2015 , ... The Academy of Model Aeronautics (AMA), led by its Executive ... Multirotor Grand Prix, to represent the First–Person View (FPV) racing community. , FPV racing ... this type of racing and several new model aviation pilots have joined the community ...
(Date:11/24/2015)... 2015 --> ... released by Transparency Market Research, the global non-invasive prenatal ... of 17.5% during the period between 2014 and 2022. ... Industry Analysis, Size, Volume, Share, Growth, Trends and Forecast ... market to reach a valuation of US$2.38 bn by ...
(Date:11/24/2015)... , Nov. 24, 2015 /PRNewswire/ - Aeterna ... announced today that the remaining 11,000 post-share consolidation ... Purchase Warrants (the "Series B Warrants") subject to ... exercised on November 23, 2015, which will result ... After giving effect to the issuance of such ...
(Date:11/24/2015)... Urdorf, Switzerland (PRWEB) , ... November 24, 2015 ... ... the plant and the environment are paramount. Insertion points for in-line sensors can ... TOLEDO has developed the InTrac 781/784 series of retractable sensor housings , ...
Breaking Biology Technology: