Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Scientists Discover Which Waters Egg-Laying Mosquitoes Like Best

10.07.2008
Scientists at Tulane and North Carolina State universities have identified the chemical cues in water that entice yellow fever mosquitoes to lay their eggs. The study is the first to isolate the compounds that the finicky mosquitoes look for to breed in open water containers.

The findings are significant because they could lead to the development of targeted lures to control the insects, which also spread dengue fever in more than 100 countries across the globe.

"No one has developed lures that target these species of mosquitoes because no one has been able to identify and isolate the compounds necessary to mass produce them into a commercially available trap," says study co-author Dawn Wesson, asso¬ciate professor of tropical medicine at Tulane University. "It’s also important to note that these lures would target egg-laying mosquitoes, which are especially dangerous because they have fed on blood at least once, and could be infected with a virus."

In a paper in this week's issue of Proceedings of the National Academy of Sciences, researchers show that yellow fever mosquitoes (Aedes aegypti) look for water with just the right amount of specific fatty acids associated with bacteria from decaying leaves and other organic debris. The article "Identification of Bacteria and Bacteria-Associated Chemical Cues That Mediate Oviposition Site Preferences by Aedes aegypti" was co-authored by Wesson and North Carolina State University researchers Charles Apperson, Coby Schal, Loganathan Ponnusamy, Ning Xu and Satoshi Nojima.

... more about:
»Chemical »Water

Yellow fever mosquitoes lay their eggs in human-made containers, usually distributing them in multiple places in residential areas. The study measured mosquitoes' responses to several containers filled with different types of bacteria and bacterial extracts to see which attracted the most egg-laying. Scientists found that the mosquitoes were attracted by a blend of fatty acids and methyl esters created from decaying leaves. Once scientists discerned specific chemical compounds that stimulated increased egg-laying, they exposed mosquitoes to varied concentrations. High levels of the chemicals discouraged the insects from laying eggs while lower concentration were more convincing. However, the mosquitoes preferred just the right amount of the chemical blend – 10 nanograms in 30 milliliters of water – to lay the most eggs.

Researchers say the right percentages of these chemicals tell the mosquitoes that the microbial content of the water is most favorable for the development of offspring.

A copy of the research paper is available online at: http://www.pnas.org/content/early/2008/06/27/0802505105.full.pdf+html

Keith Brannon | Newswise Science News
Further information:
http://www2.tulane.edu/news_and_publications/

Further reports about: Chemical Water

More articles from Life Sciences:

nachricht Closing the carbon loop
08.12.2016 | University of Pittsburgh

nachricht Newly discovered bacteria-binding protein in the intestine
08.12.2016 | University of Gothenburg

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Closing the carbon loop

08.12.2016 | Life Sciences

Applicability of dynamic facilitation theory to binary hard disk systems

08.12.2016 | Physics and Astronomy

Scientists track chemical and structural evolution of catalytic nanoparticles in 3-D

08.12.2016 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>