Navigation Links
Uncertainty drives the evolution of 'cooperative breeding' in birds
Date:8/16/2007

Rather than striking out to start a family of their own, members of some bird species will stick around longer to help a relative raise their young. Now, researchers report evidence that in African starlings such altruistic tendencies are most common among species that live in savannas, where the rainfall in any given year is virtually impossible to predict. The findings appear online August 16 in the journal Current Biology, a publication of Cell Press.

When the unpredictability of your environment is high, you dont know in advance what conditions you will be facing when the next breeding season rolls around, said Dustin Rubenstein of the University of California, Berkeley and the Cornell Laboratory of Ornithology. Faced with this uncertainty, it pays, evolutionarily speaking, to live and breed in social groups that will help you weather the bad times and make the most of the good times. Living in cooperative family groups may be like a form of insurance against the unpredictable nature of the environment that allows individuals to maximize their reproductive success over the course of their lifetimes.

Over the past few decades, mounting evidence has shown that many species of cooperatively breeding birds live in semi-arid tropical and sub-tropical environments, particularly in sub-Saharan Africa and Australia. Although that pattern suggested that the environment might explain the behavior, few studies showed a strong relationship between the incidence of cooperative breeding among species and any particular environmental feature, the researchers noted.

In the new study, the researchers examined the pattern of breeding behavior exhibited by 45 species of African starlings in relation to the environments in which they liveincluding savannas, deserts and tropical forestswhile controlling for the evolutionary relationships among them. They also examined the rainfall patterns typical of each of those environments in 47 African countries
'/>"/>

Contact: Nancy Wampler
nwampler@cell.com
617-386-2121
Cell Press
Source:Eurekalert

Page: 1 2

Related biology news :

1. Unchecked DNA replication drives earliest steps toward cancer
2. Climate change drives widespread amphibian extinctions
3. Habitat microstructure drives salamander metamorphosis
4. Mindless autopilot drives people to underestimate food decisions
5. Buildup of damaged DNA in cells drives aging
6. A genetic gang of 4 drives spread of breast cancer
7. Molecular biology fills gaps in knowledge of bat evolution
8. Same mutation aided evolution in many fish species, Stanford study finds
9. Researchers trace evolution to relatively simple genetic changes
10. Family trees of ancient bacteria reveal evolutionary moves
11. Great White shark evolution debate involves WSU Lake Campus geology professor
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/30/2014)... DURHAM, N.C. -- Pollution in urban and farm runoff ... a new study finds. , The study, published ... shows that nitrogen in the runoff ends up in ... tumors on the animals, eyes, flippers and internal organs. ... and the National Oceanic and Atmospheric Administration (NOAA) conducted ...
(Date:9/30/2014)... wrong with your muscles because of age, disease or injury, ... That,s where a new research report published in the October ... comes in. In the report, a team of scientists produce ... scientists "see" which genes are active in an organ at ... and that men have approximately 400 more active genes in ...
(Date:9/30/2014)... , Sept. 30, 2014  Spectra ... solutions for the biotech and power generation ... new RECONN Bioprocess Manager, an easy-to-use and ... geared towards bioprocess development laboratories. ... disparate bioreactor and analyzer systems. Accessing and ...
Breaking Biology News(10 mins):Pollution linked to lethal sea turtle tumors 2Pollution linked to lethal sea turtle tumors 3Scientists identify which genes are active in muscles of men and women 2Spectra Automation Introduces RECONN Bioprocess Manager 2
... National Institute of Standards and Technology (NIST) have ... clumps of proteins in protein-based pharmaceuticals. This first ... can be assured that their instruments are faithfully ... concern because of its impact on quality control ...
... laundry products and air fresheners found the products emitted ... off at least one chemical regulated as toxic or ... was listed on the product labels. , "I first ... me that the air fresheners in public restrooms and ...
... the first issue of , Energy & Environmental Science ... Free for all to read online, this inaugural ... hydrogen storage, thermochemical biofuel production, sustainable energy, and much ... of the highest quality, knowing that they can rely ...
Cached Biology News:NIST trumps the clumps: Making biologic drugs safer 2Toxic chemicals found in common scented laundry products, air fresheners 2Toxic chemicals found in common scented laundry products, air fresheners 3
(Date:9/30/2014)... Nematicide is a type of chemical ... parasitic roundworms, found in massive quantities virtually everywhere—in ... animals. Nematicides have tended to be broad-spectrum toxicants ... through the soil. A single gram of soil ... more than 10,000 species classified, they are one ...
(Date:9/30/2014)... 2014 Follow us on LinkedIn ... type of cholesterol carrier or lipoprotein in the blood. ... cholesterol levels in the body, especially along the walls ... attack and other cardiovascular disorders. Cardiovascular Diseases (CVD) is ... cholesterol levels on a regular basis, to assess an ...
(Date:9/30/2014)... Fast, semi-automatic creation of ... documents ChemAxon , a leader ... for life science research, launches ChemCurator, an application ... from documents. Markush structures are essential ... and understanding Markush structures is a difficult and ...
(Date:9/30/2014)... CORALVILLE, Iowa , Sept. 30, 2014 /PRNewswire/ ... in the discovery and development of proprietary new ... United States Patent and Trademark Office (USPTO) issued ... patent application entitled, "Benzoic Acid, Benzoic Acid Derivatives ... Methods of Making and Use Thereof." ...
Breaking Biology Technology:Nematicides Market by Types (Fumigants, Organophosphates, Carbamate and Bio-Nematicides), Applications (Agrochemicals, Industrial, and Others), and Geography (North America, Europe, Asia-Pacific & ROW) - Global Trends & Forecasts to 2019 2Surging Diabetic, Obese and Hypertensive Population Drives the Global Cholesterol Testing Market, According to New Report by Global Industry Analysts, Inc. 2Surging Diabetic, Obese and Hypertensive Population Drives the Global Cholesterol Testing Market, According to New Report by Global Industry Analysts, Inc. 3Surging Diabetic, Obese and Hypertensive Population Drives the Global Cholesterol Testing Market, According to New Report by Global Industry Analysts, Inc. 4ChemAxon Introduces ChemCurator for Chemical Information Extraction and Markush Structure Creation 2KemPharm, Inc. Receives Patent from the USPTO for Novel Prodrug of Hydromorphone, KP511 2
... ... ... , , , ... ...
... ... web to cost effectively boost the pool of eligible patients for screening for any ... upload recruitment material approved by their Institutional Review Board (IRB), on their own specific ... ...
... ... ... ... ...
Cached Biology Technology:Spectral granted IDE approval by U.S. FDA to conduct pivotal trial for Toraymyxin(TM) 2Spectral granted IDE approval by U.S. FDA to conduct pivotal trial for Toraymyxin(TM) 3Spectral granted IDE approval by U.S. FDA to conduct pivotal trial for Toraymyxin(TM) 4RESolutions Rapid Enrollment Solutions, LLC Announces Launch of Novel Patient Recruitment Web Site - Clinical Trial Spotlight™ 2RESolutions Rapid Enrollment Solutions, LLC Announces Launch of Novel Patient Recruitment Web Site - Clinical Trial Spotlight™ 3China-Biotics, Inc. Inaugurated the Commercial Production of its New Production Facility 2China-Biotics, Inc. Inaugurated the Commercial Production of its New Production Facility 3China-Biotics, Inc. Inaugurated the Commercial Production of its New Production Facility 4China-Biotics, Inc. Inaugurated the Commercial Production of its New Production Facility 5China-Biotics, Inc. Inaugurated the Commercial Production of its New Production Facility 6China-Biotics, Inc. Inaugurated the Commercial Production of its New Production Facility 7
...
...
... and supplies, for 10 chips, provides ... perform standard-sensitivity RNA analysis (nanogram levels) ... automated electrophoresis system. Supplied are 1,250 ... StdSens stain, 20 microliters RNA ladder, ...
... vectors are designed for enhanced translation of cloned ... rabbit reticulocyte lysate. The maps for pCITE-2b(+) and ... following exceptions: pCITE-2b(+) is a 3793 bp plasmid; ... and Xcm I sites. Subtract 7 bp from ...
Biology Products: