Navigation Links
Biologists consider unifying framework to explain evolutionary puzzles
Date:6/3/2009

KNOXVILLE -- Birds are commonly thought of as being the paragon of monogamous fidelity, staying true to their mate for life. Yet, in most bird species, some nests contain offspring of individuals other than the one's tending the nest.

Why would a bird invest in another bird's offspring when genetically such parenting would seem to provide no evolutionary advantage? Many scientists are trying to understand how evolution leads to this phenomenon called "extra-pair parentage."

Erol Akay, a postdoctoral fellow at Stanford University, is one such scientist who has examined the function of extra-pair parentage. His research has drawn some surprising conclusions, including the idea that extra-pair parentage might result from reproductive "agreements" and transactions between breeding individuals, instead of being the result of males and females "cheating" on each other.

Akay is part of a group of leading theoretical biologists, ecologists, and mathematicians who will gather at the National Institute for Mathematical and Biological Synthesis (NIMBioS) at the University of Tennessee, Knoxville, June 10-12, to develop a new unified framework for evolutionary biology one that accounts for phenomena like the cooperative behavior exemplified by extra-pair parentage.

The group's goal is to integrate the dynamics of how biological systems function and how these functional dynamics evolve. Functional dynamics refers to the processes that make an organism work, such as the physiological processes of the body, the hormones and cells, and the behavior of individuals. Evolution looks at how organisms change over time. "These two approaches actually complement each other and need to be looked at together," Akay said.

Using bird behavior as an example of functional dynamics, Akay said, male and female birds care for their offspring, defend against predators, and bring food to the nest. "But should what the birds are doing be viewed as cooperation or competition?" he asks. "In other words, to assure the survival of their offspring, are the birds working together or separately as individuals?"

From an evolutionary perspective, if the birds are working as a team, Akay continues, how does their teamwork evolve over time? If they're working as individuals against each other, how does each bird play against the other to make the other do more work?

Akay's research has been conducted under the guidance of Stanford University professor Joan Roughgarden, who, along with Akay, is co-organizing the Function and Evolution Working Group at NIMBioS. One of the world's most influential theoretical ecologists, Roughgarden is the author of two books that challenge the Darwinian theory of sexual selection, which says that competition for mates and choice for genetic benefits drives the evolution of certain traits. Roughgarden's new "social selection" theory argues, however, that cooperative processes of breeding, rather than competition and conflict, drive the evolution of reproductive behavior. Akay and Roughgarden have developed mathematical models that use cooperative game theory to test their hypotheses.

The NIMBioS working group, "Integrating Functional and Evolutionary Dynamics at Multiple Scales," aims to introduce new mathematical methods to biology. "The hope is that by doing this work, we will give applied researchers an easier way to utilize evolutionary theory in their work, and ultimately, it will give us a better understanding of how living things evolve," Akay said.


'/>"/>

Contact: Jay Mayfield
jay.mayfield@tennessee.edu
865-974-9409
University of Tennessee at Knoxville
Source:Eurekalert

Related biology news :

1. CCNY, CSHL biologists find birdsong of isolates reverts to norm over several generations
2. FANTOM findings boost for biologists
3. Penn biologists discover how silent mutations influence protein production
4. UIC biologists use DNA to study migration of threatened whale sharks
5. Penn biologists demonstrate that size matters... in snail shells
6. Two innovative University of Texas at Austin biologists become HHMI Early Career Scientists
7. Plant biologists discover gene that switches on essence of male
8. Cleaning up oil spills can kill more fish than spills themselves, say Queens biologists
9. Biologists solve mystery of black wolves
10. Biologists discover link between CGG repeats in DNA and neurological disorders
11. Biologists learn structure, mechanism of powerful molecular motor in virus
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/30/2017)... , June 30, 2017 Today, American ... and supplier of face and eye tracking software, ... Product provider program. "Artificial intelligence ... way to monitor a driver,s attentiveness levels while ... being able to detect fatigue and prevent potential ...
(Date:5/16/2017)... May 16, 2017  Veratad Technologies, LLC ( www.veratad.com ... age and identity verification solutions, announced today they will ... 2017, May 15 thru May 17, 2017, in ... International Trade Center. Identity impacts the ... in today,s quickly evolving digital world, defining identity is ...
(Date:4/19/2017)... , April 19, 2017 ... its vendor landscape is marked by the presence of ... is however held by five major players - 3M ... these companies accounted for nearly 61% of the global ... leading companies in the global military biometrics market boast ...
Breaking Biology News(10 mins):
(Date:7/18/2017)... ... July 18, 2017 , ... Recently recognized ... https://dataformsoftware.com ) announces the migration of its flagship cloud-based product Planet Life Cycle ... team-centric, enterprise work management system that merges strategic and financial planning with execution. ...
(Date:7/17/2017)... Yorba Linda, Ca (PRWEB) , ... July 17, ... ... highly heterogeneous and are characterized by a wide range of overlapping clinical features. ... pace of discovery in the field of NDD research and testing. , ...
(Date:7/16/2017)... (PRWEB) , ... July 16, 2017 , ... ... equipment and analytical instruments announced the launch of its new line of Extreme ... ideal for applications that require CO2 and humidity for optimal cell growth such ...
(Date:7/14/2017)... Denville, USA/ Martinsried, Germany (PRWEB) , ... July ... ... a newly developed standardized solution for sample preparation of proteins to clean peptides ... the Diagenode Bioruptor® sonication system. , The PreOmics iST Kit is based ...
Breaking Biology Technology: