Navigation Links
This beetle uses eggs as shields against wasps
Date:9/14/2011

. "At least a quarter of the wasps will die."

"I've seen the beetles lay from one to three eggs on top of a bottom egg. These are all shield eggs: They all have this flat, sort of shield-type look to them. For eggs with three shields on top, I've never found a bottom egg that was attacked. Those with just one egg on top get attacked much more than those with two eggs on top or three," said Deas.

"It was clear that the beetles were stacking their eggs in response to parasitoids. I exposed some beetles to parasitoids and some not. I found that those beetles that were not exposed to parasitoids laid very few stacks, and those that were exposed to parasitoids laid anything between 50 and 90 percent stacks."

In addition, Deas found that beetles in an environment with more parasitoids stack their eggs much more frequently than beetles in an environment where the parasitoids are few or none.

Then Deas switched the treatments, removing the wasps from the first group and adding wasps to the group that had been parasitoid-free. "I wanted to see how plastic the beetles were. Could they adjust according to what risk there was?" said Deas. "And sure enough they could."

The beetles can adjust how often they stack their eggs depending on the risk of parasitism, but some beetles seem to have a preferred strategy regardless of the risk.

"It looked like there are those beetles that lay tons of stacks no matter what level of parasitism they are exposed to, or they only lay a few stacks. Part of what I'm going to try to do next is figure out whether or not there are different strategies," said Deas.

"It's such a common organism that does a really curious thing," said Deas. "You walk by on campus getting your coffee, and you just don't realize that there's this intriguing thing happening. You know a lot about the larger, more charismatic organisms, but a lot of these smaller species have cool traits that are just aching to b
'/>"/>

Contact: Daniel Stolte
stolte@email.arizona.edu
520-626-4402
University of Arizona
Source:Eurekalert  

0

GOOD

Page: 1 2 3 4 5

Related biology news :

1. Beetles get by with a little help from their friends
2. Wielding microbe against microbe, beetle defends its food source
3. Cross kingdom conflicts on a beetles back
4. Landscape-scale treatment promising for slowing beetle spread
5. Holy guacamole: invasive beetle threatens Floridas avocados
6. Controlling cucumber beetles organically
7. New Southern California beetle killing oaks
8. Beetle shell inspires brilliant white paper
9. What scientists know about jewel beetle shimmer
10. Inconspicuous leaf beetles reveal environments role in formation of new species
11. Scientists isolate new antifreeze molecule in Alaska beetle
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
This beetle uses eggs as shields against wasps
(Date:5/20/2013)... Geology articles posted online ahead of ... wide swath of geoscience subdisciplines, including minerals exploration, ... Locations studied include Siberia; the Sumatran subduction margin; ... Ukraine; Mars; and the Southeastern U.S. Atlantic Margin. ... and plate tectonics;, 2. The clear fingerprint of ...
(Date:5/19/2013)... the University of California, Davis have engineered a strain ... light. They report their findings today at the ... , "In this work, we used synthetic biology approaches ... dioxide and light energy for growth) cyanobacterial metabolism for ... McEwen, the lead researcher on the study. He ...
(Date:5/18/2013)... FL (May 18, 2013) Research presented at ... managing digestive health through diet and lifestyle. ... plagued by reduced muscle strength, fatigue and poor ... when patients are in remission. A randomized, double ... that vitamin D supplementation corresponded to significant relief ...
Breaking Biology News(10 mins):New in GEOLOGY: Gems, Darwin, Mars, Hemp, Snowball Earth, a Siberian Impact Crater, and More 2New in GEOLOGY: Gems, Darwin, Mars, Hemp, Snowball Earth, a Siberian Impact Crater, and More 3New in GEOLOGY: Gems, Darwin, Mars, Hemp, Snowball Earth, a Siberian Impact Crater, and More 4New in GEOLOGY: Gems, Darwin, Mars, Hemp, Snowball Earth, a Siberian Impact Crater, and More 5New in GEOLOGY: Gems, Darwin, Mars, Hemp, Snowball Earth, a Siberian Impact Crater, and More 6New in GEOLOGY: Gems, Darwin, Mars, Hemp, Snowball Earth, a Siberian Impact Crater, and More 7New in GEOLOGY: Gems, Darwin, Mars, Hemp, Snowball Earth, a Siberian Impact Crater, and More 8New in GEOLOGY: Gems, Darwin, Mars, Hemp, Snowball Earth, a Siberian Impact Crater, and More 9New in GEOLOGY: Gems, Darwin, Mars, Hemp, Snowball Earth, a Siberian Impact Crater, and More 10New in GEOLOGY: Gems, Darwin, Mars, Hemp, Snowball Earth, a Siberian Impact Crater, and More 11Research examines new methods for managing digestive health 2Research examines new methods for managing digestive health 3
... Clinic and Riverain Medical today announced the establishment of ... whether chest X-ray CAD (computer-aided detection) can improve practical ... designed to determine whether chest X-ray CAD can help ... stage when they are most treatable, leading to improved ...
... 2003, Europes first Mars orbiter arrived at the Red ... rewrite the text books as its instruments send back ... spacecraft reached another milestone in its remarkable career by ... to investigate martian mysteries, the orbiter has revolutionised our ...
... the human immunodeficiency virus (HIV-1) molecular machinery responsible ... to a study by investigators at the University ... (AVRC), published November 23 in PLoS Computational Biology. ... adaptability of HIV-1 has so far foiled the ...
Cached Biology News:Cleveland Clinic leading clinical program to improve early-stage lung cancer detection 2Mars Express -- 5000 orbits and counting 2Mars Express -- 5000 orbits and counting 3
(Date:5/21/2013)... YORK , May 21, 2013  The Lindsley F. ... today that it is a Grand Challenges Explorations ... Gates Foundation .  Dr. Sara Lustigman , ... innovative global health and development research project, titled Innovative ...  These worms are needed to screen drugs to help ...
(Date:5/21/2013)... led by George Washington University Professor Tianshu Li ... in small droplets is strongly size-dependent, an important ... The formation of ice at the nanoscale is ... also has important implications for climate research and ... from supercooled water is generally initiated by a ...
(Date:5/21/2013)... Savoury Systems International (SSI), a leader in ... Southeastern USA Sales Broker. Braddy’s new role will allow ... Southeast. , In 2004 Braddy founded Southeastern ... food processors and industrial manufacturers. Braddy has worked ... and has over 25 years of sales management experience. ...
(Date:5/21/2013)... , May 21, 2013 According ... Research ( http://www.transparencymarketresearch.com ) "Biochip Products and Services Market ... - U.S. Industry Analysis, Size, Share, Growth, Trends and Forecast, 2012 - 2018," ... 2011 and is expected to grow at a CAGR ... estimated value of USD 4.7 billion in 2018. ...
Breaking Biology Technology:New York Blood Center's Research Institute Receives Grand Challenges Explorations Grant For Groundbreaking Research in Global Health and Development 2New York Blood Center's Research Institute Receives Grand Challenges Explorations Grant For Groundbreaking Research in Global Health and Development 3Study led by GW professor provides better understanding of water's freezing behavior at nanoscale 2The U.S. Biochip Products and Services Market is Expected to Reach USD 4.7 Billion in 2018: Transparency Market Research 2The U.S. Biochip Products and Services Market is Expected to Reach USD 4.7 Billion in 2018: Transparency Market Research 3The U.S. Biochip Products and Services Market is Expected to Reach USD 4.7 Billion in 2018: Transparency Market Research 4The U.S. Biochip Products and Services Market is Expected to Reach USD 4.7 Billion in 2018: Transparency Market Research 5
... a contract research and manufacturing organization (CRO/CMO), has been ... exceptional performance in support of Lilly,s strategic objectives."It is ... by such an elite organization and it provides solid ... and superior customer service in the delivery of our ...
... aTyr Pharma Scientific Advisory Board Member Recognized for Development ... Wing Hung Wong, Professor of Statistics and of Health ... been elected to the US National Academy of Sciences. ... one of the highest honors that can be accorded ...
... May 17 Hai Kang Life Corporation Limited ... LOAC (Lab-on-a-Chip) system, EFADchip ... Global Event for Biotechnology held in Atlanta, through ... the largest annual gathering for the biotechnology industry ...
Cached Biology Technology:Professor Wing Wong Elected to the National Academy of Sciences 2A New Era in the Application of Lab-on-a-Chip to Rapid Point-of-Care Diagnosis 2A New Era in the Application of Lab-on-a-Chip to Rapid Point-of-Care Diagnosis 3
... The VSOS-4 Orbital Shaker is designed to ... provide a uniform motion that is both mixing ... VSOS-4 Orbital Shaker provides a smooth, quiet, reproducible ... a wide range of laboratory applications such as ...
... FastPlax Titer Kit is designed for determination of ... 46 days as in other methods. Classical determination ... of plaques, but the FastPlax Kit takes advantage ... gp64 glycoprotein on the cell surface as early ...
... EVOware is Tecans state-of-the-art software for all ... and scheduling in a single, scalable software ... and consistent, simplifying the control of all ... a Freedom EVO 100 with one liquid ...
... Kit is an advanced system for isolating DNA from ... be used directly for any downstream application. ... to use in 56 minutes Low melting point ... and TBE gels No specialised equipment required ...
Biology Products: