Navigation Links
Raising giant insects to unravel ancient oxygen
Date:10/29/2010

Boulder, CO, USA - The giant dragonflies of ancient Earth with wingspans of up to 70 centimeters (28 inches) are generally attributed to higher oxygen atmospheric levels in the atmosphere in the past. New experiments in raising modern insects in various oxygen-enriched atmospheres have confirmed that dragonflies grow bigger with more oxygen, or hyperoxia.

However, not all insects were larger when oxygen was higher in the past. For instance, the largest cockroaches ever are skittering around today. The question becomes how and why do different groups respond to changes in atmospheric oxygen.

The secrets to why these changes happened may be in the hollow tracheal tubes insects use to breathe. Getting a better handle on those changes in modern insects could make it possible to use fossilized insects as proxies for ancient oxygen levels.

"Our main interest is in how paleo-oxygen levels would have influenced the evolution of insects," said John VandenBrooks of Arizona State University in Tempe. To do that they decided to look at the plasticity of modern insects raised in different oxygen concentrations. The team raised cockroaches, dragonflies, grasshoppers, meal worms, beetles and other insects in atmospheres containing different amounts of oxygen to see if there were any effects.

One result was that dragonflies grew faster into bigger adults in hyperoxia. However, cockroaches grew slower and did not become larger adults. In all, ten out of twelve kinds of insects studied decreased in size in lower oxygen atmospheres. But there were varied responses when they were placed into an enriched oxygen atmosphere. VandenBrooks will be presenting the results of the work on Monday, Nov. 1 at the annual meeting of the Geological Society of America in Denver.

"The dragonflies were the most challenging of the insects to raise," said VandenBrooks because, among other things, there is no such thing as dragonfly chow. As juveniles
'/>"/>

Contact: Christa Stratton
cstratton@geosociety.org
Geological Society of America
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Spirit of ovarian cancer advocate keeps fundraising drive on track
2. Efforts underway to rescue vulnerable bananas, giant swamp taro, other Pacific Island crops
3. New study shows how giant tortoises, alligators thrived in High Arctic 50 million years ago
4. Greenland glacier gives birth to giant iceberg
5. Extinct giant shark nursery discovered in Panama
6. A shrunken giant
7. Giant sequoias yield longest fire history from tree rings
8. Sequencing, annotation and comparative analysis of nine BACs of giant panda (Ailuropoda melanoleuca)
9. Giant panda genome reveals new insights into the bears bamboo diet
10. Canopy giants and miniature fungi among 250 new species discovered in Kews 250th anniversary year
11. Microorganism may provide key to combating giant salvinia throughout Louisiana
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/24/2015)... March 24, 2015   NexID Biometrics LLC, ... security-authentication needs, today announced the beginning of shipments of ... The company, based in Potsdam, ... three-day Connect:ID Expo, which began here today at the ... version 2.0 of its SDK boosts the accuracy rate ...
(Date:3/23/2015)... 2015   HOYOS Labs , a leading global ... that the Company will demonstrate multiple biometrics-based technologies under ... at Connect:ID on March 23 through 25, 2015, in ... highlight the IEEE Biometric Open Protocol Standard; free biometrics-based ... access control system. BOPS was invented by HOYOS Labs ...
(Date:3/20/2015)... --Research and Markets ( http://www.researchandmarkets.com/research/4stcg3/india_sensors ) ... Sensors Market Forecast and Opportunities 2020" report ... is projected to grow at a CAGR over ... industrial and healthcare sectors are the key application ... adoption of MEMS technology in sensors is growing ...
Breaking Biology News(10 mins):NexID Begins Shipments Of Version 2.0 Fake-Finger-Detection Solution 2HOYOS Labs to Showcase Host of Biometrics Technologies at Connect:ID in Washington, D.C. 2HOYOS Labs to Showcase Host of Biometrics Technologies at Connect:ID in Washington, D.C. 3India Sensors Market Forecast and Opportunities 2020 - STMicroelectronics held the largest share in 2014 2India Sensors Market Forecast and Opportunities 2020 - STMicroelectronics held the largest share in 2014 3
... in twenty years with the current poaching rates. The loss of ... have tremendous effects on the ecosystems they now live in. ... are key drivers of ecosystem functioning because theyre not controlled by ... Beest, published in Journal of Ecology , highlights the role ...
... of the Energy Department,s National Renewable Energy Laboratory ... National Academy of Engineering. Election to the ... professional distinctions accorded to an engineer. Academy membership ... engineering research, practice or education and who have ...
... (February 12, 2014)New data from the field in Central Africa shows ... killed. They are being poached, for their ivory, at a shocking ... to an earlier paper in the online journal PLOS ONE ... published by the same scientists . Many organisations collaborated in the ...
Cached Biology News:Poaching threatens savannah ecosystems 2NREL director Arvizu elected to National Academy of Engineering 2New data shows continued decline of African forest elephants 2
(Date:4/20/2015)... Biotech Ltd. (Nasdaq: SVA), a leading provider of biopharmaceutical ... for the fourth quarter and full year ended December ... to the fourth quarter 2013) , Quarterly sales ... $22.9 million in the prior year period. Excluding revenue ... of $0.1 million in the fourth quarter of 2014 ...
(Date:4/17/2015)... April 17, 2015  Centrillion Technologies, a ... grant from the National Human Genome Research ... Health (NIH). The grant will help fund ... development of breakthrough genomic technologies, including phased ... substrates. Centrillion has been developing this transformative ...
(Date:4/17/2015)... , April 17, 2015  US-Australian drug discovery ... a Memorandum of Understanding with the Feinstein Institute ... New York to collaborate with the ... The collaboration brings together the drug ... clinical expertise of the Feinstein Institute in neurosciences ...
(Date:4/16/2015)... and OSAKA, Japan , ... Research Application (CiRA) of Kyoto University and Takeda ... will work together to develop clinical applications of ... heart failure, diabetes mellitus, neurological disorders and cancer ... Applications" (T-CiRA) is designed to expedite multiple research ...
Breaking Biology Technology:Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 2Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 3Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 4Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 5Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 6Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 7Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 8Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 9Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 10Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 11Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 12Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 13Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 14Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 15Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 16Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 17Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 18Novogen and Feinstein Institute Join Forces to Find Effective Treatments for Brain Cancer 2Novogen and Feinstein Institute Join Forces to Find Effective Treatments for Brain Cancer 3Novogen and Feinstein Institute Join Forces to Find Effective Treatments for Brain Cancer 4Novogen and Feinstein Institute Join Forces to Find Effective Treatments for Brain Cancer 5Novogen and Feinstein Institute Join Forces to Find Effective Treatments for Brain Cancer 6CiRA and Takeda Enter 10-year Collaboration on iPS Cell Research 2CiRA and Takeda Enter 10-year Collaboration on iPS Cell Research 3
... (NASDAQ: ITMN ) today announced that Dan Welch, ... at the Bank of America Merrill Lynch 2011 Health Care ... 1:00 p.m. PDT.   To access a live ... may log on to the investor relations page of InterMune,s ...
... NxStage Medical, Inc. (Nasdaq: NXTM ), ... financial results for the first quarter of 2011 ended ... end of its guidance range. (Logo: http://photos.prnewswire.com/prnh/20110503/MM94799LOGO) ... increased 25 percent to a record $50.6 million compared ...
... Md. It took nearly a decade before University of ... the anthrax strain used in the 2001 deadly letter attacks. ... high-powered science team have published the first account of the ... and gave bioterrorism investigators a way to "fingerprint" bacteria. ...
Cached Biology Technology:NxStage® Reports Record Revenue for the First Quarter of Fiscal 2011 2NxStage® Reports Record Revenue for the First Quarter of Fiscal 2011 3NxStage® Reports Record Revenue for the First Quarter of Fiscal 2011 4NxStage® Reports Record Revenue for the First Quarter of Fiscal 2011 5NxStage® Reports Record Revenue for the First Quarter of Fiscal 2011 6NxStage® Reports Record Revenue for the First Quarter of Fiscal 2011 7Now, the story can be told how scientists helped ID 'Amerithrax' 2Now, the story can be told how scientists helped ID 'Amerithrax' 3
Request Info...
Request Info...
Ready for formulation or direct injection into animals Provided in convenient 100, 250, 1000 and 10,000 nmol sizes HPLC purified, salt free, sterile filtered, and endotoxin tested ...
... Ambion's custom siRNA service provides the premium ... silencing research. Custom siRNAs can be readily ... base target sequence, or by providing the ... out Ambion's Silencer Validated and Silencer Pre-designed ...
Biology Products: