Navigation Links
The importance of (experimental) design
Date:2/25/2014

There are clear advantages to living in cities: safety, ready availability of infrastructure, plenty of company etc. Nevertheless, a large number of people eschew them for the benefits of country life, such as clean air and lots of space. Many species of animals, and particularly birds, face the same choice between living in large groups or remaining in smaller ones, thereby avoiding disadvantages of larger colonies such as the increased risk of disease and increased aggression from neighbours. What causes different individuals of a particular species to take the decisions they do?

It's all in the genes

One possible explanation is that animals and birds might be genetically influenced to breed in smaller or larger colonies. This idea gained widespread acceptance in 2000, when Charles and Mary Brown reported the results of a field experiment of unprecedented scope. The Browns worked on Cliff Swallows, a species of American swallow that breeds in colonies of variable size. Some individuals appear to be more resistant to nest parasites so can breed in larger, more parasite-infested colonies where they can achieve higher foraging efficiencies by following their many neighbours to the insect swarms on which they feed. The scientists cross-fostered an astounding 2,000 nestlings from nests in small colonies to nests in large colonies and vice versa and recaptured over 700 of the birds when they returned to breed in the following years. Analysis of the data showed convincingly that swallows hatched in larger colonies (but reared in smaller ones) chose to breed in large colonies, whereas the reverse was true for swallows hatched in small colonies. In other words, the birds' choice is determined by genetic factors.

Or is it?

Appealing though the conclusion might be, something does not sound quite right. How would a genetic component of the choice of group size be selected and maintained throughout
'/>"/>

Contact: Richard Wagner
richard.wagner@vetmeduni.ac.at
43-148-909-15831
University of Veterinary Medicine -- Vienna
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. EU-funded study underlines importance of Congo Basin for global climate and biodiversity
2. Study sheds new light on importance of human breast milk ingredient
3. Differences between human twins at birth highlight importance of intrauterine environment
4. Programming cells: The importance of the envelope
5. Video study shows which fish clean up coral reefs, showing importance of biodiversity
6. Gene discovery reveals importance of eating your greens
7. National survey highlights perceived importance of dietary protein to prevent weight gain
8. Emerging importance of computerized cognitive testing -- new therapies for dementia
9. Researchers have identified a novel immunological mechanism of great importance for vaccine developm
10. Keck award enables Carnegie Mellon and Stanford to dramatically expand crowdsourced RNA design
11. Report presents designs for study of cancer risks near US nuclear facilities
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
The importance of (experimental) design
(Date:10/29/2014)... as ,facultative, form part—together with other cells—of tissues and ... from the others. However, they have a very special ... cells again. This phenomenon is something that happens in ... tissue growth, thus allowing the regeneration of the organ ... the underlying mechanism that allows these cells to retain ...
(Date:10/29/2014)... organisms in the living world compete with members ... in how much they invest into their competitive ... to get access to high-quality resources, while others ... of the lower-quality resources that are left over ... animal and human societies seems to fluctuate considerably ...
(Date:10/29/2014)... cohort of kidney cancer patients in Europe sheds light ... reveals an apparent link between exposure to aristolochic acid ... The research, by an international team led by scientists ... in Montreal, underscores the importance of investigating possible sources ... plants of the Aristolochia genus, also has been suspected ...
Breaking Biology News(10 mins):A mechanism that allows a differentiated cell to reactivate as a stem cell revealed 2Evolution of competitiveness 2Evolution of competitiveness 3Study sheds light on genetic architecture of kidney cancer 2Study sheds light on genetic architecture of kidney cancer 3
... "At the dawn of the 21st century, we are faced with ... world has grown at a rapid pace, turning the demand for ... Gebisa Ejeta (winner of the world food prize 2009) who is ... held in Lancaster, UK, 13 15th September 2010. ...
... Tenn., Sept. 9, 2010 -- Exemplary efforts to "go ... a 2010 Federal Energy & Water Management Award and ... of the lab,s Sustainable Campus Initiative. The ... Management Program recognized ORNL for its outstanding achievements in ...
... SEPTEMBER 9, 2010 The American Society of Agronomy ... Awards Ceremony on Nov. 2 during the scientific society,s ... The annual awards are presented for outstanding contributions to ... , Alan Blaylock, Agrium Advanced Technologies ...
Cached Biology News:ORNL wins 2 awards for sustainability program 2American Society of Agronomy announces award recipients 2American Society of Agronomy announces award recipients 3American Society of Agronomy announces award recipients 4
(Date:10/27/2014)... 2014 Kalorama Information says that PCR is ... the United States and is ... researcher said the FDA,s Emergency Use Authorization (EUA) to authorize ... the detection of the Ebola virus was an indication ... assess the IVD industry and its biennial survey on ...
(Date:10/27/2014)... Orlando, Florida (PRWEB) October 27, 2014 ... aims at reducing and eliminating several types of ... have not been achieved in over 30 years ... of Noah's Light Foundation, proves that one mom's ... was diagnosed just before Halloween trick-or-treating, and it’s ...
(Date:10/27/2014)... 2014 Janssen Biotech, Inc. and the ... today the launch of Get Your ... campaign designed to provide resources for people living ... role of nutrition and appropriate therapy in managing ... associated with this release, please click: http://www.multivu.com/players/English/7261131-janssen-ccfa-get-your-full-course-for-ibd-wellness-with-sunny-anderson/ ...
(Date:10/26/2014)... 2014 The report "Protective Coatings Market ... Global Trends & Forecast to 2019", defines and segments ... of volume consumed and value generated. The protective coatings ... 2014 to 6,701.3 KT by 2019, at a CAGR ... market data tables and 22 figures spread through 219 ...
Breaking Biology Technology:Kalorama: PCR The Go-to Test in Ebola Fight 2Kalorama: PCR The Go-to Test in Ebola Fight 3FDA Approves Breakthrough in Pediatric Brain Cancer - First in 30 Years 2FDA Approves Breakthrough in Pediatric Brain Cancer - First in 30 Years 3Celebrity Cook Sunny Anderson Teams Up With Janssen And Crohn's & Colitis Foundation Of America To Launch Educational Campaign 2Celebrity Cook Sunny Anderson Teams Up With Janssen And Crohn's & Colitis Foundation Of America To Launch Educational Campaign 3Celebrity Cook Sunny Anderson Teams Up With Janssen And Crohn's & Colitis Foundation Of America To Launch Educational Campaign 4Protective Coatings Market Poised to Reach $18,431.8 Million by 2019 - Report by MarketsandMarkets 2Protective Coatings Market Poised to Reach $18,431.8 Million by 2019 - Report by MarketsandMarkets 3Protective Coatings Market Poised to Reach $18,431.8 Million by 2019 - Report by MarketsandMarkets 4
... Zone Sonography Technology Allows Premium Compact Ultrasound Imaging at ... Area,s Leading Healthcare ... a,leading regional healthcare provider and member of Sutter Health, today,announced ... a developer of premium ultrasound technology, in the Center,s,radiology department. ...
... Sept. 19 CellCyte Genetics,Corporation (the "Company") (OTC ... in order to develop, manufacture and market its ... CellCyte Genetics is developing stem cell enabling ... significantly increased,retention of adult stem cells to diseased ...
... of DelSite cGMP Polymer, IRVING, Texas, ... CARN) today announced its wholly-owned,subsidiary, DelSite Biotechnologies, ... agreement with a biotechnology company for,transdermal delivery ... polysaccharide which is produced under cGMP,with high ...
Cached Biology Technology:Memorial Medical First in Stanislaus County to Provide Convertible Ultrasound From ZONARE 2Memorial Medical First in Stanislaus County to Provide Convertible Ultrasound From ZONARE 3CellCyte Genetics Corp. Forms Device Division to Develop and Manufacture Stem Cell Cultivation and Replication Products 2CellCyte Genetics Corp. Forms Device Division to Develop and Manufacture Stem Cell Cultivation and Replication Products 3CellCyte Genetics Corp. Forms Device Division to Develop and Manufacture Stem Cell Cultivation and Replication Products 4Carrington Subsidiary DelSite Biotechnologies Enters into Technology Evaluation Rights License Agreement for Transdermal Delivery of Vaccines 2Carrington Subsidiary DelSite Biotechnologies Enters into Technology Evaluation Rights License Agreement for Transdermal Delivery of Vaccines 3
... Ascent FL is equipped ... luminometric measurement technologies that ... of advanced features of ... Ascent. Fluoroskan Ascent FL ...
... Thermo's orbital shaker stands both ... more ergonomic height, and help ... from welded tubular steel, these ... support the weight and minimize ...
... Polyribonucleotides (RNA polymers) are ... action of the enzyme, ... Midland, and the appropriate, ... With the exception of ...
...
Biology Products: