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  

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:8/19/2015)... 2015  VOXX International Corporation (Nasdaq: VOXX ... a Definitive Agreement to purchase the assets, inclusive ... leader EyeLock through an acquiring entity.  Upon consummation ... interest in the acquiring entity. The closing of ... diligence.  Expanding on its existing supply chain and ...
(Date:8/12/2015)... , August 12, 2015 ... of mobile payment innovation and advanced biometrics technology is ... the way consumers rely on using their credit cards, ... reinventing the future for payment services led by companies ... NXTD ), :  Google, Inc. (NASDAQ: GOOG ), ...
(Date:8/10/2015)... , August 10, 2015 The latest ... offers comprehensive analysis of the global border security market ... revenues of $16.4bn in 2015. Now: Border security ... an example of the business critical issue you need to ... visiongain ,s objective analysis of how this will impact ...
Breaking Biology News(10 mins):VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 2VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 3VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 4VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 5Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 2Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 3Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 4Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 5Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 6Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 2Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 3Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 4Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 5Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 6Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 7Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 8Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 9
... Conn. , May 30, 2013 /PRNewswire-iReach/ -- ... industry leaders from around the world will convene ... detection and identification of biological threats ... http://photos.prnewswire.com/prnh/20130530/CG22485 ) The conference is organized ...
... from around the globe issued joint statements today to ... and innovation can play in the pursuit of sustainable ... threat of drug resistance in infectious agents including tuberculosis. ... leaders attending next month,s G8 Summit and other international ...
... exams might want to wait before pulling an all-night ... neurons are concerned. Carnegie Mellon University neuroscientists have discovered ... repeated exposure to a stimulus shrinks synapses. The findings ... Journal of Neuroscience . It,s well known ...
Cached Biology News:Join Leading Organizations at Biodetection Technologies 2013 in Alexandria, VA from June 18-19, 2013 2Join Leading Organizations at Biodetection Technologies 2013 in Alexandria, VA from June 18-19, 2013 3Science academies issue 'G-Science' statements to call world leaders' attention to global challenges 2Carnegie Mellon neuroscientists discover new phase of synaptic development 2
(Date:8/27/2015)... CA (PRWEB) , ... August 27, 2015 , ... ... unique opportunity for venture capital funds, investment firms and animal health companies to ... Forum have raised $160 million. Several have also received licensing agreements or distribution ...
(Date:8/27/2015)... Calif. , Aug. 27, 2015  Asterias Biotherapeutics, ... the emerging field of regenerative medicine, today announced that ... conferences in the month of September.  ... present at Rodman & Renshaw,s 17th Annual Global Investment ... PT at the St. Regis Hotel in ...
(Date:8/27/2015)... ... August 27, 2015 , ... METTLER TOLEDO's web-based EasyFinder™ ... product choices to a manageable shortlist of bench and floor scales and terminals. ... fit best with the customer’s industry and application. , Side-by-side product comparisons ...
(Date:8/26/2015)... 2015  Roka Bioscience, Inc. (NASDAQ: ROKA ), ... solutions for the detection of foodborne pathogens, today announced ... Sidoti & Company Emerging Growth Conference on September 2 ... the New York Marriott Marquis. A ... the investor relations section of Roka Bioscience,s website at ...
Breaking Biology Technology:VetStem Biopharma, Inc. Among Seventeen Companies Selected to Present at the KC Animal Health Investment Forum on September 1st 2015 2VetStem Biopharma, Inc. Among Seventeen Companies Selected to Present at the KC Animal Health Investment Forum on September 1st 2015 3Asterias Biotherapeutics to Present at Upcoming Investor Conferences 2METTLER TOLEDO Updates Online Scale Selection Tool 2
... recently released list of the top 100 IT leaders ... vice president and CIO of Church Mutual Insurance Company ... organizations, including churches as well as schools, camps and other ... , , Herman Nell, senior vice president and CIO of ...
... Technical College recently finished the first semester of ... which will soon be taught at technical colleges all ... need for security specialists. , ,MATC, one of the ... two-year degree development process down to five months. Network ...
... SBC kicked off its strategy of digital convergence on ... showing off its new home entertainment service. , ,Designed ... the service brings together satellite TV, digital video recording and ... an SBC satellite dish and DSL connection. , ,In his ...
Cached Biology Technology:Computerworld: Three Wisconsin CIOs among top 100 IT leaders 2MATCs new computer security program gears up for second semester 2MATCs new computer security program gears up for second semester 3SBC blends TV, video, music and the Internet in a new media box 2
... The DNA Engine Dyad instrument is the ... Featuring MJ's world-class thermal performance, the ... display, as well as point-and-click navigation via ... Dyad can be easily and economically expanded ...
... the Quansys Biosciences Q-Plex Array is a ... for human, mouse, and rat research. The ... quantitative ELISA-based test where 4 distinct capture ... of a 96-well plate in a defined ...
Caliper offers a wide array of standard LabChip products designed to be used in combination with our AMS 90 and LabChip 3000 microfluidic platforms....
... for 10 chips provides the chips and ... the Experion automated electrophoresis system. This kit ... 520 microliters Pro260 gel, 45 microliters Pro260 ... 400 microliters Pro260 sample buffer, and 3 ...
Biology Products: