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:9/30/2014)... hope: A new research report published in October 2014 ... explains how scientists developed a synthetic version of a ... in human and mouse eggs similar to the natural ... fertilization. , "We believe that the results of this ... of human fertilization by providing a precise answer to ...
(Date:9/30/2014)... suite of perilous threats in today,s ocean. From ... change, fragile coral ecosystems are disappearing at unprecedented ... species of corals surrounding the island of Moorea ... their tropical environment: coral guard-crabs. New research from ... Station scientist Seabird McKeon and the museum,s predoctoral ...
(Date:9/29/2014)... of gut bacteria called Clostridium ramosum , coupled with ... work is published this week in mBio , the ... , A research team from the German Institute of Human ... bacteria including C. ramosum gained weight when fed ... ramosum were less obese even when consuming a high-fat ...
Breaking Biology News(10 mins):Synthetic sperm protein raises the chance for successful in vitro fertilization 2Smithsonian scientists discover coral's best defender against an army of sea stars 2Gut bacteria promote obesity in mice 2
... microscope integrates two Finnish innovations and brings new dimensions ... for Molecular Medicine Finland (FIMM) have in collaboration with ... finger gesture controlled microscope. The method is a combination ... multitouch display. The result is an entirely new ...
... Congress on Osteoporosis & Osteoarthritis in Valencia, Spain, Professor ... Pierre D. Delmas Prize. The prestigious award, ... Aspects of Osteoporosis and Osteoarthritis (ESCEO) and the International ... an individual who has made outstanding and major scientific ...
... - A lot of chatter goes on inside each one ... ears. Researchers at McMaster University discovered that the "cross-talk" ... important role in the development of psychiatric illness, intestinal diseases ... "The wave of the future is full of opportunity as ...
Cached Biology News:Big size multitouch display turned into a microscope 2ESCEO-IOF Servier Pierre D. Delmas Prize awarded to John. A. Kanis 2'Knowing it in your gut' is real 2
(Date:9/30/2014)... , Sept. 30, 2014 CORD:USE Cord Blood ... announce that it has entered into an Equity and ... which has licensed a series of patented technologies for the ... possible clinical applications.  Tianhe is performing Phase I/II clinical ... Spain using Tianhe,s Stem Cell Educator ...
(Date:9/30/2014)... Basel, Switzerland (PRWEB) September 30, 2014 ... advanced software solutions for drug discovery and ... the FUNGITECT consortium has chosen Genedata Selector ... next-generation sequencing (NGS) data. FUNGITECT is a ... of invasive fungal diseases via individualized anti-fungal ...
(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." ...
(Date:9/30/2014)... DEL MAR, Calif. , Sept. 30, 2014 /PRNewswire/ ... devices for women,s health announces its receipt of a ... The FemmyCycle menstrual cup has also received FDA clearance ... Health Canada, and the CE in Europe. This patent is ... design. In conjunction with this issuance, the company is releasing ...
Breaking Biology Technology:CORD:USE is Pleased to Announce it has Partnered with Tianhe Stem Cell Biotechnologies, Developer of Cord Blood Stem Cell Therapy Showing Promising Results in Clinical Trials for the Treatment of Diabetes and Autoimmune Diseases 2CORD:USE is Pleased to Announce it has Partnered with Tianhe Stem Cell Biotechnologies, Developer of Cord Blood Stem Cell Therapy Showing Promising Results in Clinical Trials for the Treatment of Diabetes and Autoimmune Diseases 3CORD:USE is Pleased to Announce it has Partnered with Tianhe Stem Cell Biotechnologies, Developer of Cord Blood Stem Cell Therapy Showing Promising Results in Clinical Trials for the Treatment of Diabetes and Autoimmune Diseases 4FUNGITECT Consortium Adopts Genedata Selector as Data Analysis Platform for Anti-fungal R 2FUNGITECT Consortium Adopts Genedata Selector as Data Analysis Platform for Anti-fungal R 3KemPharm, Inc. Receives Patent from the USPTO for Novel Prodrug of Hydromorphone, KP511 2The FemmyCycle 2
... The Board of Directors of Schering-Plough Corporation (NYSE: SGP ... share. Payment will be made on Aug. 31, 2009, to ... 2009. As of March 31, 2009, there were 1,628,335,093 common ... also declared a quarterly dividend of $3.75 per share on the ...
... BASEL, Switzerland, June 23 Syngenta announced today the successful ... year maturity. The proceeds of the bond will be used ... said: "We have taken advantage of favorable current borrowing conditions ... bond issue is part of our normal funding requirements and ...
... SyntheMed, Inc. (OTC Bulletin Board: SYMD), a biomaterials ... products, announced today that the company was recently nominated ... in pediatrics. The company is among three ... device analysts in recognition of the development of REPEL-CV(TM) ...
Cached Biology Technology:Syngenta Issues EUR 500 Million Eurobond 2SyntheMed Receives Frost & Sullivan Health Innovation Award Nomination 2
...
TNM-FH Insect Medium 1 liter...
D.R. Harper (1993) • Includes: essential information on taxonomy, culture and safe handling of viruses, immunology, monoclonal antibodies, antivirals and vaccines....
IHC Polymer Detection Kit (Rabbit DAB)150 slides...
Biology Products: