Navigation Links
Hormones dictate when youngsters fly the nest, says new research
Date:7/4/2012

Seabirds feed their young less as they reach an age to fly the nest, but it's hormones that actually control when the chicks leave home, according to new research from the University of Leeds.

The study published online in Behavioural Ecology today (05 July) aimed to pinpoint the main trigger which causes chicks to leave the nest and embark on an independent life, a process known as fledging.

While studying a colony of Manx Shearwaters (Puffinus puffinus), on the island of Skomer, researchers from the University's Faculty of Biological Sciences noticed that parent birds seemed to become increasingly insensitive to their chicks' demands for food as they grew close to fledging. At the same time the chicks showed a marked increase in levels of the hormone corticosterone. However, the team needed to know whether this increase was independent of, or caused by, the reduction in feeding.

They decided to trick the parent birds, by swapping chicks of different ages between nests which the birds make in burrows in the ground to see how this affected both parental care and the time chicks took to fledge.

"Manx Shearwaters don't recognise their own offspring, but will simply go back to the same nest after they've gathered food. They have one chick, which makes the interactions between parent and offspring easier to study," explains lead researcher, Dr Keith Hamer. "We swapped chicks which were between 10 days and two weeks apart in age, to see what impact it would have. We wanted to find out whether parents and chicks were responding to each other's behaviour, or whether each was acting independently."

The team discovered that adults reduced their food provisioning after about 60 days of raising a chick, regardless of the chick's stage of development. Although females more than males will adjust their feeding levels to how much their chicks beg for food, after around 60 days both parents start to ignore the
'/>"/>

Contact: Dr. Keith Hamer
k.c.hamer@leeds.ac.uk
44-113-343-2983
University of Leeds
Source:Eurekalert  

Page: 1 2

Related biology news :

1. BRG1 mutations confer resistance to hormones in lung cancer
2. Study by UC Santa Barbara researchers suggests that bacteria communicate by touch
3. Research reveals first evidence of hunting by prehistoric Ohioans
4. Diabetes Research Institute develops oxygen-generating biomaterial
5. APS issues new policy requiring identification of sex or gender in reporting scientific research
6. UC Santa Barbara researchers discover genetic link between visual pathways of hydras and humans
7. Study jointly led by UCSB researcher supports theory of extraterrestrial impact
8. U of Alberta researcher steps closer to understand autoimmune diseases
9. Research on flavanols and procyanidins provides new insights into how these phytonutrients may positively impact human health
10. A project to research biological and chemical aspects of microalgae to fuel approach
11. Scripps Research discoveries lead to newly approved drug for infant respiratory distress syndrome
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Hormones dictate when youngsters fly the nest, says new research
(Date:12/11/2014)... Dec. 10, 2014  Data Sciences International (DSI), ... released a new series of digital telemetry implants ... researchers. M series, part of the PhysioTel™ Digital ... best possible physiologic data when incorporating functional endpoints ... endpoints to toxicology studies has evolved from short ...
(Date:12/10/2014)... , Dec. 9, 2014 CIE San ... catalyst that provides the connective tissue that enhances care ... them to easily share client-level information; earned a second ... expand to organizations serving seniors aging in community and; ... partner on December 11 th 4-6p. ...
(Date:12/5/2014)... 4, 2014  Tute Genomics, a leader in cloud-based ... Series A1 funding led by UK-based Eurovestech. Peak Ventures ... the investment round. "We are at a ... next-generation sequencing and seeks new approaches for the diagnosis, ... , MD MBA, and CEO of Tute Genomics. "One ...
Breaking Biology News(10 mins):New telemetry implants expected to change how large animal toxicology studies are conducted 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 4Tute Genomics Raises $2.3 Million to Scale Up Cloud-Based Genome Analytics and Accelerate Personalized Medicine 2Tute Genomics Raises $2.3 Million to Scale Up Cloud-Based Genome Analytics and Accelerate Personalized Medicine 3
... the American Museum of Natural History and City College of ... bears are roaming into what was traditionally thought of as ... they are officially listed as extirpated. The preliminary data was ... that sightings of Ursus arctos horribilis in Canada,s ...
... University of Zaragoza (UNIZAR) have calculated the energy and ... treatment plants and livestock slurry for generating electricity in ... which are more environmentally friendly and, in the case ... waste to generate electricity has economic and environmental advantages. ...
... Helicobacter pylori ( H. pylori ) in their ... infected. Besides cancer, these bacteria are linked to other chronic ... H. pylori genome in 1997 revealed this pathogen to ... of crucial questions: Where do the genes of Helicobacter ...
Cached Biology News:Grizzly bears move into polar bear habitat in Manitoba, Canada 2Waste could generate up to 7 percent of electricity in Spain 2Waste could generate up to 7 percent of electricity in Spain 3Gene regulation: Can we stomach it? 2
(Date:12/22/2014)... N.C. , Dec. 22, 2014  Alternative ... announced that it has signed a letter of ... that has developed and patented a nanotechnology-based development ... diagnostics products that enable rapid on-site collection and ... use/abuse and health issues in an immediate, non-invasive ...
(Date:12/22/2014)... ITRA Global, one of the largest organizations dedicated ... has further expanded its global reach with the affiliation ... Australia, reports Mylinda Vick, CCIM, Chairman of the ITRA ... ACORPP (Australian Corporate Property and Projects) , is a ... to a wide range of clients in the private ...
(Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), one ... of Nick Maroulis, Pharm.D. to the newly created position ... In this position, Dr. Maroulis will continue to manage ... of our multi-site pharmacies as the company expands. Dr. ... that time he has served in many different capacities ...
(Date:12/19/2014)... Decision Resources Group finds that the Latin ... percent compound annual growth rate through 2023. This is ... the increasing adoption of dental implants. Growing aesthetic consciousness ... spur demand for dental biomaterials because they can improve ... Other key findings from Decision Resources Group,s ...
Breaking Biology Technology:ALNE Announces Intention To Acquire BioTechPharma 2ITRA Global Continues International Expansion in Perth and Brisbane, Australia 2BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Latin American Dental Biomaterial Market Will Expand at a 12 Percent Annual Growth Rate Through 2023 2Latin American Dental Biomaterial Market Will Expand at a 12 Percent Annual Growth Rate Through 2023 3
... , ... (AAA) are so deadly, they kill 13,000 Americans every year. Minimally invasively emergency repair of ... data. The latest research on AAA is being presented at the 22nd annual International ... ...
... nitride nanotubes (BNNTs) are the divas of the nanoworld. ... temperamental compared to their carbon-based cousins. On the ... over 1,100 degrees Celsius, says Yoke Khin Yap, an ... nanotubes would burn like charcoal in a barbecue at ...
... , FT. LAUDERDALE, Fla. , Jan. 15 ... Green Hedge Fund to provide further investment for the company,s growth ... new level" is how CEO Chris Hamilton views this ... As controlling and ultimately reducing Carbon Emissions feature so highly on ...
Cached Biology Technology:Minimally Invasive Repair of Ruptured Aortic Aneurysm Could Save More Lives than Surgery 2Minimally Invasive Repair of Ruptured Aortic Aneurysm Could Save More Lives than Surgery 3Minimally Invasive Repair of Ruptured Aortic Aneurysm Could Save More Lives than Surgery 4Minimally Invasive Repair of Ruptured Aortic Aneurysm Could Save More Lives than Surgery 5Harnessing the divas of the nanoworld 2InfoSpi to Create $500m Green Hedge Fund Focusing on the Carbon Credit Market 2
... an imaging based plate reader for ... throughput screening which can utilize both ... light sources and cameras in the ... in photon detection technology. It ...
...
... and supplies, for 10 chips, provides ... perform high-sensitivity RNA analysis (picogram levels) ... automated electrophoresis system. Supplied are 1,250 ... HighSens stain, 20 microliters RNA ladder, ...
... solid. PROTECT FROM LIGHT. PACKAGED UNDER ... that acts as a selective, reversible ... (IC 50 = 4 μM ... and PTP1B 298 , respectively). ...
Biology Products: