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:9/1/2014)... animals, bats are perfectly adapted to a life without light. ... reflected echoes to measure distance to obstacles or prey. In ... delays. A study carried out by researchers at Technische Universitt ... map dynamically adapts to external factors. , Closer ... in too close to an object, the number of activated ...
(Date:8/31/2014)... sniffing the highly infectious bacteria C. diff , ... developed by a team at the University of Leicester. ... demonstrated that it is possible to identify the unique ... to rapid diagnosis of the condition., What is more, ... identify different strains of the disease simply from their ...
(Date:8/31/2014)... Change , suggests that if current trends continue ... targets for total greenhouse gas (GHG) emissions in 2050. ... about the food we choose and its environmental impact. A ... of a number of actions that need to be taken ... food for all. , As populations rise and global ...
Breaking Biology News(10 mins):Zooming in for a safe flight 2Scientists develop 'electronic nose' for rapid detection of C. diff infection 2Changing global diets is vital to reducing climate change 2Changing global diets is vital to reducing climate change 3Changing global diets is vital to reducing climate change 4
... pan out. Neither did two other potential anti-aging agents. ... is now a front- runner in ongoing animal experiments ... inflammation, cancer and other destructive processes, can boost the ... meeting of the American Aging Association, University of Michigan ...
... discovery of how some abnormal cells can avoid a ... and repairing the damage, is giving investigators at St. ... cancer cells use to survive and thrive. , The ... have cheated death once by disabling the main suicide ...
... (DPI) fisheries scientists are investigating ways to boost the ... by anglers. , Some guidelines designed to improve fish ... trevally, mulloway, sand whiting, yellowfin bream and dusky flathead. ... and funded by NSW DPI and the Recreational Fishing ...
Cached Biology News:Agent slows aging in mice 2Cells re-energize to come back from the brink of death 2Releasing fish for the future 2
(Date:8/29/2014)... Boston, MA (PRWEB) August 29, 2014 Due ... (FRC) last week, the Adult Stem Cell Technology Center, ... donations to support stem cell therapy research that might benefit ... adult stem cells for new stem cell technologies and therapeutic ... ALS Ice Bucket Challenge donors who wish not ...
(Date:8/29/2014)... MA, San Antonio, TX (PRWEB) August 29, 2014 ... ISO 9001:2008 and ISO 13485:2003 certified, GAMP® 5 ... has been awarded an international Phase II clinical ... with non-Hodgkin’s lymphoma. , Throughout this trial, Intrinsic ... including, but not limited to, protocol and charter ...
(Date:8/28/2014)... CA (PRWEB) August 28, 2014 Best ... products for the food processing industry, is asking industry ... side-by side comparison of the E2 soap they’re currently ... Sanitizing Foam Soap . Hand hygiene is critical ... the food processing environment. Six key criteria are identified ...
(Date:8/28/2014)... MA (PRWEB) August 28, 2014 “This kit ... test to screen from 0 to 150 ppb,” said Mark ... is a significant benefit to plant owners and USDA-GIPSA inspection ... and other commodities. Testing can take place in a matter ... only can the plant test the feed and grain before ...
Breaking Biology Technology:The Adult Stem Cell Technology Center, LLC Declines ALS Ice Bucket Challenge Donors Wishing to Support Ethical Research for New Stem Cell Therapies 2The Adult Stem Cell Technology Center, LLC Declines ALS Ice Bucket Challenge Donors Wishing to Support Ethical Research for New Stem Cell Therapies 3Intrinsic Imaging Awarded Phase II Clinical Trial to Assess New Treatment for Non-Hodgkin’s Lymphoma 2Best Sanitizers, Inc. Asks Food Industry Professionals: With Fall Harvest On the Way, Is Your E2 Hand Soap Up to the Task? 2
... Calif., Dec. 12 Codexis, Inc., a leading,developer ... directors have been named to the company,s Board ... Vice President of Innovation and,Chemicals Technology, Shell Global ... Dennis Wolf, Executive Vice President and CFO, MySQL, ...
... PLYMOUTH MEETING, Pa., Dec. 12 Genaera,Corporation (Nasdaq: ... Executive Officer of Genaera, is scheduled to present at ... part of an,RBC Capital Markets, panel discussion of diabetes ... and will take place in,New York on Thursday, December ...
... First Time on 50 mg/Day Dose for PRISTIQ for the ... Treatment of Major Depressive ... of Wyeth (NYSE: WYE ), announces that data from,two ... inhibitor (SNRI), showed,that adult patients who received a 50 mg/day ...
Cached Biology Technology:Rothwell, Wolf Elected to Codexis Board 2Rothwell, Wolf Elected to Codexis Board 3New Phase 3 Data Showed PRISTIQ Significantly Reduced Symptoms of Major Depressive Disorder Versus Placebo 2New Phase 3 Data Showed PRISTIQ Significantly Reduced Symptoms of Major Depressive Disorder Versus Placebo 3New Phase 3 Data Showed PRISTIQ Significantly Reduced Symptoms of Major Depressive Disorder Versus Placebo 4New Phase 3 Data Showed PRISTIQ Significantly Reduced Symptoms of Major Depressive Disorder Versus Placebo 5New Phase 3 Data Showed PRISTIQ Significantly Reduced Symptoms of Major Depressive Disorder Versus Placebo 6
NORMAL DONOR DONKEY SERUM...
... EPS 301 Power Supply, 1. ... maximum.Constant voltage or constant current modes.Single-unit ... precision and reproducibility.Suitable for submarine, mini ... as well as semidry and mini ...
B3-1...
Human CCL26/Eotaxin-3 MAb (Clone 115002)...
Biology Products: