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:9/17/2014)... University] After decades of decline, grasses have returned ... the eye, the marsh in those places seems healthy ... key service of the marsh coastal protection ... the ecosystem function hasn,t come back," said ecologist Mark ... of the study in the journal Biological Conservation ...
(Date:9/16/2014)... Center for Children,s Environmental Health at the Mailman School ... association between childhood asthma and prenatal exposure to two ... Results appear online in the journal Environmental Health ... during pregnancy to higher levels of the chemicals, butylbenzyl ... percent and 78 percent increase in risk of developing ...
(Date:9/16/2014)... on September 13, 2014. The fire is human-caused and ... 2,300 acres in size and is mostly being fueled ... calm Monday night due to higher humidity. Yesterday ... beginning to construct a fireline on the West and North ... on the fire: , 7 20-person Crews, 4 Hot Shot ...
Breaking Biology News(10 mins):Cape Cod saltmarsh recovery looks good, falls short 2Cape Cod saltmarsh recovery looks good, falls short 3Phthalates heighten risk for childhood asthma 2Phthalates heighten risk for childhood asthma 3
... launched a key initiative to keep Europe at the forefront ... cell therapies to restore lost, damaged, or ageing cells and ... body,s ,master cells, that have not yet been programmed to ... of stem cells, and it is becoming clear that if ...
... (TWIC) Program, Ensures No Fraudulent Duplicate Enrollments ... Fla., June 17 ID Solutions, Inc., ... trusted,credential assurance, reported that it has been ... the Transportation Security Agency,s (TSA,s),TWIC program. The ...
... its latest state of the environment report, released ... environmental issues facing the NAFTA partners. The ... biodiversity and ecosystems, and pollution. Specific topics include ... vaquita porpoiseand the quality and quantity of water ...
Cached Biology News:European Science Foundation aims to strengthen 'regenerative medicine' 2ID Solutions Awarded Full-Production Order for Fingerprint Processing Software for TWIC 2New report looks at the state of the North American environment 2
(Date:9/17/2014)... Wilmington, DE (PRWEB) September 17, 2014 ... profit organization committed to lowering the barriers to ... has announced the appointment of Carmen Nitsche as ... organization looks to expand its global reach. , ... she was Vice President, Corporate Development. At Accelrys, ...
(Date:9/16/2014)... YORK , Sept. 16, 2014 This report ... the following Product Segments: Software, Hardware, and Biocontent. The report ... , Japan , Europe ... America , and Rest of World. Annual estimates and ... a seven-year historic analysis is provided for these markets. Market ...
(Date:9/16/2014)... emerging field of molecular electronics could take our ... the construction of tiny circuits from molecular components. ... take on the roles currently played by comparatively-bulky ... researchers from five Japanese and Taiwanese universities has ... electronics: a molecule called picene. In a paper ...
(Date:9/16/2014)... BlueInGreen® , a water quality ... delivering dissolved gases into liquids, announced the addition ... manufacturer’s representative firm to its sales network. H2Flow ... water and wastewater applications in the Canadian provinces ... in 1992 and serves Quebec and Ontario markets ...
Breaking Biology Technology:Pistoia Alliance Expands Business Development with Appointment of Carmen Nitsche 2Global Bioinformatics Industry 2Global Bioinformatics Industry 3Global Bioinformatics Industry 4Global Bioinformatics Industry 5Global Bioinformatics Industry 6Global Bioinformatics Industry 7Global Bioinformatics Industry 8Global Bioinformatics Industry 9Global Bioinformatics Industry 10Global Bioinformatics Industry 11Global Bioinformatics Industry 12Global Bioinformatics Industry 13Global Bioinformatics Industry 14Global Bioinformatics Industry 15Global Bioinformatics Industry 16Global Bioinformatics Industry 17Global Bioinformatics Industry 18Global Bioinformatics Industry 19Global Bioinformatics Industry 20Global Bioinformatics Industry 21Global Bioinformatics Industry 22Global Bioinformatics Industry 23The future face of molecular electronics 2BlueInGreen® Expands into Canada – Signs Representative Agreement with H2Flow Equipment Inc. 2
... This release is available in German . ... magic word in electronics. Dr. Willi Auwaerter and Professor Johannes ... Universitaet Muenchen (TUM), have now presented a novel molecular switch ... functionality of the switch is the position of a single ...
... Therapeutics, Inc. today announced that Ivan Bergstein, MD, the ... the Oppenheimer 22nd Annual Healthcare Conference on Wednesday, December ... Astoria Hotel in New York City. ... Inc. is a clinical stage biopharmaceutical company developing novel ...
... 2011 Syndax Pharmaceuticals, Inc. announced today ... study, demonstrated entinostat, a novel, oral small molecule inhibitor ... single agent in patients with relapsed or refractory Hodgkin,s ... 11, from 6:00 to 8:00 PM PT at the ...
Cached Biology Technology:The smallest conceivable switch 2Stemline Therapeutics, Inc. to Present at the Oppenheimer 22nd Annual Healthcare Conference 2Entinostat Demonstrates Activity in Hodgkin's Lymphoma 2Entinostat Demonstrates Activity in Hodgkin's Lymphoma 3Entinostat Demonstrates Activity in Hodgkin's Lymphoma 4Entinostat Demonstrates Activity in Hodgkin's Lymphoma 5
... precision pressure regulator and pressurized syringe holder for ... Steady flow rate Microinjecting Fine ... Can be added to any new or existing ... manufacturer, even homemade. Connect to house air or ...
Chicken polyclonal to UCK2 ( Abpromise for all tested applications). Antigen: Full length protein, corresponding to amino acids 1-261 of Human UCK2 Entrez Gene ID: 7371 Swiss Protein ID: ...
Physical Form: powder Color: white Removes FLAG peptide from N-terminal and Met-N-terminal fusion proteins. Supplied with optimized enterokinase buffer....
Features , Designed to assist users in applying domed caps to tube strips and plates , Minimises the pressure required to seal the caps effectively , Enables multiple tubes to be sealed simultaneousl...
Biology Products: