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

another beetle species," said Deas. "My idea was the wasps preferred to attack the largest eggs, because the largest eggs lead to larger offspring and larger offspring have a lot of advantages. For example, they can be faster foragers and lay more eggs if they're female."

"Then I saw that they were attacking these other eggs from M. amicus that were much larger."

Wondering how the wasp larvae would do in the apparently larger eggs, Deas investigated and was surprised to find that the larvae were not doing well at all.

"I didn't understand why. My idea was that there's just too much yolk in there. There are instances where wasps have been developing in size and they sort of drown because there's still yolk around them and they can't pupate in moisture, they can't turn into a cocoon. I thought that was the reason."

The moment of truth

"I was looking at the eggs under the microscope, and I saw when I looked on the side that it seemed like there was another egg underneath it," said Deas. "I took some really small insect pins and started to scrape around the edge of the egg. Eventually I had a layer come off."

M. amicus' apparently larger egg turned out to be not one egg, but a whole stack of beetle eggs laid one on top of the other. "I was thinking: 'Why would they do that?'" said Deas. "And I thought about the wasp."

"I went out in the field, collected a bunch of seedpods and brought them back to the lab."

Deas measured the parasitism on eggs laid individually versus on bottom eggs in a stack to see whether having one or more eggs on top was sufficient to protect the bottom eggs. And sure enough, Deas found the individual eggs were parasitized much more frequently than those eggs that were shielded at the bottom of a stack.

On the verge of what he thought was a new discovery, Deas was shocked to find that scientists before him had found the same thing in the 1920s.'/>"/>

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:9/15/2014)... epilepsy drug to a morphine regimen can result in ... combination can reduce the dosage of the opioid needed ... researchers at Indiana University. , The result could bring ... difficult-to-treat condition often felt in the arms and legs ... a huge unmet need for better treatments for neuropathic ...
(Date:9/15/2014)... When this week,s print issue of the journal ... up from New Mexico, Montana and even the Netherlands, ... more and more the norm in these connected times. ... it will produce innovations in biology, medicine, biotechnology and ... this scientist talked with that one, that one knew ...
(Date:9/15/2014)... A new strategic vision document, released today by ... describes the long-term goals, objectives, and strategies for ... work over the next five years (2015-2020). ... short-term activities, to be funded in 2015, will ... policy fellowships. , The $500 million, 30-year ...
Breaking Biology News(10 mins):IU study: Combining epilepsy drug, morphine can result in less pain, lower opioid doses 2Collaboration drives achievement in protein structure research 2NAS Gulf Research Program announces strategic vision, initial opportunities 2NAS Gulf Research Program announces strategic vision, initial opportunities 3NAS Gulf Research Program announces strategic vision, initial opportunities 4
... researchers have proved that eating strawberries reduces the harm ... Published in the open access journal Plos One, the ... ulcers. A team of Italian, Serbian and Spanish ... in a mammal stomach that has been damaged by ...
... of a brain protein that regulates gene expression may play ... and sometimes disabling psychiatric disease. As reported in the latest ... International Society for Bipolar Disorders, levels of SP4 (specificity protein ... in postmortem samples from patients with bipolar disorder. The study ...
... latest issue of Elsevier,s Materials Today , researchers ... of carbon nanotubes to create mechanical components for use ... industry has excelled in miniaturizing components, with individual elements ... reducing the size of mechanical systems has proved much ...
Cached Biology News:Strawberries protect the stomach from alcohol 2Gene regulatory protein is reduced in bipolar disorder 2Gene regulatory protein is reduced in bipolar disorder 3Nanotubes key to microscopic mechanics 2
(Date:9/15/2014)... Bioptigen announced today the availability ... the optical device metrology and pre-clinical ophthalmic research markets. ... for Contact Lens Metrology is designed for non-destructive, non-contact, ... lens, IOL structures, and donor tissues. The ... immersed in a hydration bath (saline), automated segmentation of ...
(Date:9/15/2014)... Research and Markets has announced the ... by Services, by Technology, by Application - Global Forecast to ... Exome Sequencing (WES) is next-generation technology used for strategically sequencing ... exome, which is the total of all exons of an ... actually converted into proteins after translation. It is responsible for ...
(Date:9/15/2014)... Die zweite jährliche International Plasma ... 18. Oktober stattfinden. Die IPAW ist eine gemeinsame ... (PPTA) und ihrer Mitgliedsunternehmen und hat ... für die Gewinnung von Quellplasma zu steigern ... Verbessern von Leben zu würdigen , Das ...
(Date:9/15/2014)... , Sept. 15, 2014  The second annual ... celebrated October 12-18. A joint initiative of the ... member companies , IPAW is designed to: ... , Recognize the contributions of plasma donors in saving ... plasma protein therapies and rare diseases ...
Breaking Biology Technology:Bioptigen Introduces Deep Imaging OCT System for Contact Lens Metrology 2Global Whole Exome Sequencing (Systems, Kits, Library Preparation, Target Enrichment) Market by Product, by Services, by Technology, by Application - Forecast to 2018 2Global Whole Exome Sequencing (Systems, Kits, Library Preparation, Target Enrichment) Market by Product, by Services, by Technology, by Application - Forecast to 2018 3International Plasma Awareness Week feiert Spender und rückt seltene Krankheiten in den Mittelpunkt 2International Plasma Awareness Week feiert Spender und rückt seltene Krankheiten in den Mittelpunkt 3International Plasma Awareness Week To Celebrate Donors And Spotlight Rare Diseases 2International Plasma Awareness Week To Celebrate Donors And Spotlight Rare Diseases 3
... 6 CryoLife, Inc., (NYSE: ... processing company, today announced that it has received a Humanitarian ... (FDA) for its CryoValve® SG aortic human heart valve. ... Humanitarian Device Exemption (HDE) for the CryoValve SG aortic human ...
... , PALO ALTO, Calif., Oct. 6 Varian, Inc. (NasdaqGS: VARI) ... October 5, 2009, its stockholders adopted the merger agreement entered ... Varian for $52.00 per share in cash. Approximately 84% ... August 12, 2009, the record date for the special meeting, ...
... ... today announced its sole focus of delivering novel nanotechnology solutions for instantly assessing ... world, without requiring a costly, complex medical infrastructure. , ... Santa Barbara, CA (PRWEB) October ...
Cached Biology Technology:CryoLife Receives Humanitarian Use Device Designation for SynerGraft(R) Processed Human Aortic Heart Valves 2CryoLife Receives Humanitarian Use Device Designation for SynerGraft(R) Processed Human Aortic Heart Valves 3CryoLife Receives Humanitarian Use Device Designation for SynerGraft(R) Processed Human Aortic Heart Valves 4Nanomedicine Company Focuses on Improving Premature Infant Health and Reducing Death Rate 2Nanomedicine Company Focuses on Improving Premature Infant Health and Reducing Death Rate 3Nanomedicine Company Focuses on Improving Premature Infant Health and Reducing Death Rate 4
Immunogen: C terminus [VQLKRSKNDSKPYC] of cardiac elav-type RNA-binding protein (ETR-3) Storage: -20 C, Avoid Freeze/Thaw Cycles...
Borosilicate Glass. Certified for use with the Beacon 2000 Systems, 1,000 tubes/case...
... 2000 One-Step FP Standardization Kit is ... low fluorescence polarization values of fluorescein ... Beacon 2000 System. It also allows ... generated by their instrument to the ...
Whole blood is collected from mice (Swiss Webster, 8-10 weeks old,either sex) and processed within 45 minutes of collection. The complement is then filtered and pooled on ice, bottled and stored at -...
Biology Products: