Navigation Links
Midge keeps invasive mosquito in check, aiding native mosquitoes
Date:6/4/2009

AUDIO: Barry Alto describes his research on the interactions of predators and prey. This is the audio for an audio slide show.

Click here for more information.

In a drama played out across the southeastern U.S. in containers as small as a coffee cup, native and invasive mosquito larvae compete for resources and try to avoid getting eaten. One of the invasive mosquitoes, the Asian tiger mosquito (Aedes albopictus), can carry dengue fever, a viral disease that sickens 50 to 100 million people a year in the tropics, so this seemingly inconsequential struggle has implications for human health.

In a new study in the British Ecological Society's Journal of Animal Ecology, researchers report that the larvae of a tiny fly, the midge Corethrella appendiculata, eat more of the larvae of the invasive Asian tiger mosquito than of the native Eastern treehole mosquito (Aedes triseriatus). This allows the native mosquitoes to survive even though the invasive mosquitoes are better at gobbling up resources.

(To see an audio slide show about the research, please go to: http://news.illinois.edu/slideshows/2009_Alto_Mosquitoes_Final/index.html)

The researchers found inherent size differences between the mosquito species. The treehole mosquito is larger than the Asian tiger mosquito, which makes it less vulnerable to predation from the small but voracious predatory midge. Previous studies have found that the native mosquito larvae also adopt less "risky" behaviors than the invasive mosquito larvae, making them less susceptible to being eaten.

"Size is having a major effect in terms of how the prey are getting consumed," said Barry Alto, a medical entomologist with the State Natural History Survey at the University of Illinois and principal investigator on the study.

"This is another mechanism that allows the native mosquito to hang on and co-exist with the invasive mosquitoes in certain areas where predators are present," Alto said.

The Asian tiger mosquito was first detected in the U.S. in 1985 in a shipment of used tires to a Texas port. Like the native mosquito, it lays its eggs in watery containers, including tires. Even if the water evaporates, a splash of rain and a supply of nutrients such as the microbes that feed on dead leaves are all that the larvae need to hatch and grow.

Once found only in tropical and subtropical regions of Southeast Asia, the Asian tiger mosquito has now spread to Africa, the Americas, Australia, the Caribbean, Europe and the Middle East. Like the yellow fever mosquito (Aedes aegypti), another invasive mosquito that is now well established in the Americas, the Asian tiger mosquito can carry several viral diseases that afflict humans.

The interaction between predators and native and invasive mosquitoes is one of several factors that may contribute to disease transmission, Alto said.

"We want to know: Where do the invasive and the native species co-exist? Where does one or the other go extinct? And what happens in the areas where there's no predator?" he said. The insights that come from such studies may also apply to other native and invasive species, he said.


'/>"/>

Contact: Diana Yates
diya@illinois.edu
217-333-5802
University of Illinois at Urbana-Champaign
Source:Eurekalert  

Related biology news :

1. Polarized light guides cholera-carrying midges that contaminate water supplies
2. Midge-hunting scientists tackle spread of devastating bluetongue virus
3. Lowly Icelandic midges reveal ecosystems tipping points
4. Dont go changing: New chemical keeps stem cells young
5. Scrawny gene keeps stem cells healthy
6. A walk in the park a day keeps mental fatigue away
7. Candy-coating keeps proteins sweet
8. Scientists discover DNA knot keeps viral genes tightly corked inside shell
9. Genetic tag team keeps cells on cycle
10. NASA keeps eye on ozone layer amid Montreal Protocols success
11. Right breakfast bread keeps blood sugar in check all day
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Midge keeps invasive mosquito in check, aiding native mosquitoes
(Date:3/2/2017)... , March 2, 2017 Summary This ... Perrigo and its partnering interests and activities since 2010. ... Read the ... and Alliance since 2010 report provides an in-depth insight into ... sciences companies. On demand company reports are prepared ...
(Date:2/28/2017)... Feb. 28, 2017   Acuant , a leading ... announces significant enhancements to new and core technologies building ... products include mobile and desktop Acuant FRM TM ... - a real time manual review of identity documents ... provides the fastest and most accurate capture software to ...
(Date:2/24/2017)... BARCELONA, Spain , Feb. 24, 2017  EyeLock LLC, ... will demonstrate its elite iris biometric solution on ... with X16 LTE at Mobile World Congress ... in Qualcomm,s Booth in Hall 3, Stand ... contains the Qualcomm Haven™ security platform—a combination ...
Breaking Biology News(10 mins):
(Date:3/29/2017)... March 29, 2017 Patients are the most ... CSL Behring awards Local Empowerment for Advocacy Development (LEAD) ... groups. These groups tackle complex legislative and public policy ... Hill and in statehouses across the U.S. ... was awarded to New England Hemophilia Association (NEHA), Neuropathy ...
(Date:3/29/2017)... COLORADO SPRINGS, CO , March 29, 2017 /PRNewswire/ - Last year,s ... who support kratom are not the only efforts active to generate ... that substitute opiate based pharmaceutical drugs in the healthcare market place. ... Earlier this ... U.S. based developer and distributor of pharmaceutical and nutritional products, announced ...
(Date:3/29/2017)... ... March 29, 2017 , ... ComplianceOnline, the leading governance, ... announced its 3rd Annual Medical Device Summit 2017 venue and speaker lineup. The Summit ... Hotel, in Boston, MA. , The Omni Parker House Hotel, which is located at ...
(Date:3/29/2017)... ... March 29, 2017 , ... ... cell-based assays, disperses a quarterly travel award to noteworthy scientists who will be ... announced that its new round of awards are being given to two postdoctoral ...
Breaking Biology Technology: