Navigation Links
Fear of the cuckoo mafia
Date:4/17/2014

aliatory parasite that destroys their nest, it's best to adapt and accept the parasitic egg," says Abou Chakra.

Maria Abou Chakra works in the Evolutionary Theory Department at the Max Planck Institute for Evolutionary Biology. In collaboration with Christian Hilbe, now at Harvard University, and Arne Traulsen, she developed mathematical models to test the mafia hypothesis. The underlying principle in their minimalistic model was that each parasite lays no more than one egg in another bird's nest, which the host may accept or eject. A more complex model allowed the parasites to lay several eggs, each of which could be destroyed or accepted individually.

"Biologists prefer the complex model, because it is closer to reality. But we came to the same conclusion with both models: the dynamics of the interaction between host and parasite is cyclical." An equilibrium is never established; instead, there are regular cycles in terms of the frequency of mafia and non-mafia parasites and hosts that accept an egg immediately or only after they have suffered retaliation. If the number of non-mafia brood parasites is high, the advantage lies with conditional accepters, hosts that leave the parasite's egg in their nest only after their nest has been destroyed. After all, there is little chance the parasite is a retaliator. This behaviour therefore increases among host birds. And this, in turn, improves the survival rate of the mafia-like brood parasites. As soon as the latter are in the majority, it makes sense for the hosts to accept unconditionally, which, in turn, renders the mafia-like behaviour unnecessary. The cycle begins anew.

Evolutionary biologist Amotz Zahavi postulated the mafia hypothesis back in 1979. It has been contentious ever since. Critics argue that the retaliation gives the parasites no advantage, carrying high costs instead. However, the future nestlings benefit from the hot-headed behaviour if the host parents do indeed keep a
'/>"/>

Contact: Dr. Maria Abou Chakra
abouchakra@evolbio.mpg.de
49-452-276-3237
Max-Planck-Gesellschaft
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Bees that go Cuckoo in others nests
2. Birds find ways to avoid raising cuckoos young
3. Magpie parents know a baby cuckoo when they see one
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Fear of the cuckoo mafia
(Date:8/29/2014)... MO. - In a cell,s nucleus, chromosomal DNA ... histones, an amalgam biologists call chromatin. Until about ... nuclear "sidekick," the mere packing material around which ... biologists have developed a greater appreciation for how ... investigators from multiple research institutions studying the sequence ...
(Date:8/29/2014)... Tibetan plateau -- the largest topographic anomaly above sea ... profound effect on climate and its reflection of continental ... , Katharine Huntington and colleagues employ a cutting-edge geochemical ... fossil snail shells to investigate the uplift history of ... range widely on the timing of surface uplift of ...
(Date:8/28/2014)... pleased to announce the selection of Dr. Fred Baxendale ... acknowledges those who have served ESA for at least ... the Society that has reached an extraordinary level. Candidates ... Board and then voted on by the ESA membership. ... at Entomology 2014, ESA,s Annual Meeting in Portland, Oregon ...
Breaking Biology News(10 mins):'K-to-M' histone mutations: How repressing the repressors may drive tissue-specific cancers 2'K-to-M' histone mutations: How repressing the repressors may drive tissue-specific cancers 3Snails tell of the rise and fall of the Tibetan Plateau 2Snails tell of the rise and fall of the Tibetan Plateau 3Snails tell of the rise and fall of the Tibetan Plateau 4Snails tell of the rise and fall of the Tibetan Plateau 5Snails tell of the rise and fall of the Tibetan Plateau 6Snails tell of the rise and fall of the Tibetan Plateau 7Fred Baxendale selected as Honorary Member of the Entomological Society of America 2
... cancer, perhaps there is nothing more powerful in a physician,s ... and treatment, breast cancer remains a common and significant health ... ten women will get breast cancer in their lifetime and ... and III) have no cure or effective therapeutic available. ...
... Modesto, CA (Dec. 16, 2010) With nearly 16 ... the precursor to type 2 diabetes, and half of all ... diabetes by the year 2020, nutritional approaches to maintaining healthy ... of a scientific study examining the health promotion and disease ...
... is available in French . A mother,s voice ... for language learning, say researchers from the University of ... research team made the discovery after performing electrical recordings ... birth. The brain signals also revealed that while the ...
Cached Biology News:Scientists discover powerful biomarker panel for the early detection of breast cancer 2Scientists discover powerful biomarker panel for the early detection of breast cancer 3New study suggests almonds may help reduce risk of type 2 diabetes and heart disease 2New study suggests almonds may help reduce risk of type 2 diabetes and heart disease 3Allô allô! Mom's voice plays special role in activating newborn's brain 2
(Date:8/29/2014)... MA (PRWEB) August 29, 2014 A ... in the biotech start-up dense realm of Boston-Cambridge, is ... and able investors. James Sherley, the Director of Boston’s ... increasing the local and national visibility of his company ... September 2013. , In addition to a social media ...
(Date:8/28/2014)... Best Sanitizers, Inc., the first company to ... asks food processors and food handling professionals to prepare ... currently using to Best Sanitizers’ Alpet® E3 Plus ... fighting cross-contamination and the spread of pathogens in the ... key criteria that make a hand sanitizer most effective, ...
(Date:8/28/2014)... , Aug. 28, 2014 /PRNewswire/ ... new market research report is ... Whole Exome Sequencing Market ... Preparation, Target Enrichment), by Services ... Synthesis), by Application (Cancer, Monogenic ...
(Date:8/28/2014)... Sterlitech is proud to announce that it is ... of products . These additional products increase the ... filters with surface charges. , “We have ... membrane process testing equipment, and correspondingly, a wider demand ... Sterlitech President Mark Spatz. “The addition of Synder ...
Breaking Biology Technology:The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 2The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 3The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 4Food Processors and Food Handlers are Encouraged to Prepare for Fall Harvest by Evaluating Their Current Hand Sanitizer Using Nine Key Criteria 2Food Processors and Food Handlers are Encouraged to Prepare for Fall Harvest by Evaluating Their Current Hand Sanitizer Using Nine Key Criteria 3Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 2Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 3Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 4Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 5Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 6Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 7Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 8Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 9Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 10Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 11Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 12Whole Exome Sequencing Market by Product (Systems, Kits (Library Preparation, Target Enrichment), by Services (Sequencing), by Technology (Sequencing by Synthesis), by Application (Cancer, Monogenic disorders) - Global Forecast to 2018 13Sterlitech Corporation Enhances Its Selection of Flat Sheet Membrane Filters 2
... and Chemicon International, Inc. announced today ... and apply Madison-based Promegas DNA-directed, RNA interference (ddRNAi) ... division of Serologicals Corporation, will have the right ... ddRNAi-based products and reagents for life science research. ...
... so much media attention focused on the effects of ... some light on the issue. Whatever the product, there ... cheaper labor. The effects of this are hurting many ... matter what you are making, whether you manufacture low- ...
... is reducing surgery delays and controlling instrument and staff ... and trays by using a new surgical instrument management ... , ,Gundersen Lutheran operates a teaching hospital with 325 ... medical practices, community clinics, eye clinics and pharmacies. It ...
Cached Biology Technology:Offshore outsourcing affects American workers 2Offshore outsourcing affects American workers 3Gunderson Lutheran Implements Instrument Management Systems 2
SHP-2 Antibody...
Anti human PPAR gamma2 mouse monoclonal antibody...
... Transporter 2, Neuronal (GLYT2). The antiserum has ... central nervous system. The staining pattern obtained ... using in situ hybridization with probes to ... described for glycinergic neurons. Preabsorption of the ...
Mouse monoclonal [RIZ1723] to PRDM2/RIZ...
Biology Products: