Navigation Links
Study sheds light on how marine animals survive stress
Date:5/25/2010

MEDFORD/SOMERVILLE, Mass. -- For marine iguanas living in the Galapagos Islands, an El Nio can be deadly. Some die from starvation while others survive. Scientists have long believed that the difference between life and death for the iguana depended on the animals' ability to secrete the stress hormone corticosterone.

Under stressful conditions, corticosterone functions like a spigot by controlling how the body expends energy during an emergency. It is associated with the "fight or flight" response to stress and is similar to cortisol in humans. But corticosterone can also be lethal if the spigot is not turned off, according to a study of marine iguanas published in the May 26 online issue of the Proceedings of the Royal Society.

The findings could provide insight into how wildlife in the Gulf of Mexico will respond to the current oil spill. Animals will secrete corticosterone to help them cope with the disaster. However, prolonged hormone production could factor into how well animals are able to survive the crisis.

From 2002 through 2008, a research team led by Tufts University Professor of Biology L. Michael Romero studied corticosterone levels in iguanas on Santa Fe Island before and after the El Nio that struck in late 2002.

The team, funded by the National Science Foundation, included co-author Martin Wikelski from the Max Planck Institute for Ornithology and Konstanz University.

The Galapagos Islands' marine iguanas are a suitable model for study because they live in predictable natural conditions. The animals feed exclusively on marine algae. Their greatest and almost only threat or stress occurs during recurrent El Nio-induced food shortages, when a decrease of algae can lead to starvation.

The scientists captured 98 healthy male iguanas on the island in December 2002, just weeks before the El Nio. They injected a group of the animals with a hormone to stimulate a biological process called nega
'/>"/>

Contact: Alexander Reid
alexander.reid@tufts.edu
617-627-4173
Tufts University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Childhood obesity indicates greater risk of school absenteeism, Penn study reveals
2. A study by the MUHC and McGill University opens a new door to understanding cancer
3. Study begins to reveal clues to the cause and progression of sepsis
4. Clones on task serve greater good, evolutionary study shows
5. New study warns limited carbon market puts 20 percent of tropical forest at risk
6. New study examines how rearing environment can alter navigation
7. Study links cat disease to flame retardants in furniture and to pet food
8. New continent and species discovered in Atlantic study
9. Study shows link between alcohol consumption and hiv disease progression
10. Feeling hot, hot, hot: New study suggests ways to control fever-induced seizures
11. Study finds environmental tests help predict hospital-acquired Legionnaires disease risk
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/19/2014)... 2014 Research and Markets ( ... "iPhone 5S Fingerprint Sensor - Apple/AuthenTec TMDR92 ... their offering. http://photos.prnewswire.com/prnh/20130307/600769 ... in July 2012, Apple introduced the fingerprint reading ... the only device of Apple incorporating such a ...
(Date:12/19/2014)... , Dec. 18, 2014 Research and Markets ... of the "Micro Market Monitor: North America Perimeter ... http://photos.prnewswire.com/prnh/20130307/600769 The ... at a CAGR of 3.6% from 2014 to 2019. ... this market, Canada is expected ...
(Date:12/19/2014)... , Dec. 18, 2014  23andMe, Inc., the leading ... study that pinpoints fine-scale differences in genetic ancestry of ... . Since immigrants first arrived more than ... has served as a meeting place for ... history and the ongoing mixing of peoples with African, ...
Breaking Biology News(10 mins):iPhone 5S Fingerprint Sensor - Apple/AuthenTec TMDR92 & Sapphire - Technology Report 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 323andMe Study Sketches Genetic Portrait of the United States 223andMe Study Sketches Genetic Portrait of the United States 323andMe Study Sketches Genetic Portrait of the United States 4
... disposing of garbage and recycling anything that can be ... cell, health problems can arise when the process breaks ... cell biologist Haoxing Xu and colleagues reveals key details ... the lysosome, functions. These insights, which may lead to ...
... the U.S. Department of Energy,s Savannah River National ... Mississippi State University to decrease mold growth in ... Funded by the Department of Homeland Security ... Mississippi State University asked SRNL and Tuskegee University ...
... are reporting discovery of a way to help proteins such ... as tomorrow,s potential "miracle cures" -- get past the biochemical ... doing their work. The new technique, described in the monthly ... for an engineered form of green fluorescent protein, the topic ...
Cached Biology News:Opening the gate to the cell's recycling center 2SRNL works to decrease hazards from mold in water damaged homes 2
(Date:12/17/2014)... Xeno Diagnostics has again received ... recent COLA inspection. Xeno has met all criteria ... accreditation organization. Accreditation is earned only by laboratories ... operations, demonstrate continued accuracy in the performance of ... survey. , While the Laboratory Excellence ...
(Date:12/17/2014)... 2014  Vermillion, Inc. (NASDAQ: VRML ), ... announced the next step in its expanded strategy to ... with the naming of current Chief Operating Officer, ... while current Chairman of the Board and CEO ... These changes are effective January 1, 2015. ...
(Date:12/17/2014)... , Dec. 17, 2014 Tigercat ... Phase 2 study evaluating the investigational oral NK-1 ... patients with severe, chronic itch who are unresponsive ... care, including topical steroids and antihistamines. ... in Visual Analog Scale (VAS) itch score from ...
(Date:12/15/2014)... PETACH TIKVAH, Israel , Dec. 15, ... BCLI ), a leading developer of adult stem cell ... Brainstorm Cell Therapeutics Ltd. was awarded a grant of ... Office of the Chief Scientist (OCS).  This is the ... grant support from the Office of the Chief Scientist, ...
Breaking Biology Technology:Xeno Diagnostics Receives 3rd Award for Laboratory Excellence 2Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 2Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 3Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 4Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 2Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 3Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 4BrainStorm Receives $1,100,000 for its 8th Annual Non-Dilutive Grant from Israel's Chief Scientist Office 2BrainStorm Receives $1,100,000 for its 8th Annual Non-Dilutive Grant from Israel's Chief Scientist Office 3
... BioRN Cluster Management GmbH presents the Biotech ... project, a web-based software to manage complex biotech projects. ... companies with an easy-to-use application for the management of ... needs of the different project partners: of scientists, project ...
... ... Not Just Test Instruments , ... (Vocus) April 25, 2010 -- Responding to the recent rash of reports of quality ... no-cost consultations on how to develop and maintain strict gage R&R for entire assembly and ...
... April 27 A non-profit organization is urging PepsiCo to follow ... its corporate donations.  "Unlike Coca-Cola, Pepsi refuses to divulge the exact amount ... President of Parents and Friends of Ex-Gays & Gays (PFOX).   , ... "This secrecy by PepsiCo can ...
Cached Biology Technology:Web-Based Management Suite Supports Complex Research Consortia 2InterTech Service to Counter Widely Reported Problems in Automotive, Medical Device and Other Industries Requiring Rigorous Quality Standards 2Pepsi Urged to Follow Example of Coca-Cola and Stop Hiding Corporate Donations 2
... slides were designed to study protein expression patterns ... Tissue slices from three different species are ... be treated as a single histological slide for ... hybridization. This format allows a rapid analysis ...
... Gene Pulser Xcell microbial system, 100 ... used for electroporation of bacterial and ... main unit, PC module for exponential ... sterile cuvettes (5 each of 0.1 ...
... Soybean-Casein Digest Medium (TSB), USP is ... recommended for general laboratory use. Due to ... Peptone, the medium will support growth of ... serum, etc. , Product conforms to United ...
... (MSTA) slides were designed to study protein expression ... species. Tissue slices from three different species ... then be treated as a single histological slide ... hybridization. This format allows a rapid ...
Biology Products: