Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

A predator from East Africa that chooses malaria vectors as preferred prey

27.12.2006
In choice tests using live prey as well as dead prey mounted in a life-like posture on cork discs, we found an East African jumping spider, Evarcha culicivora, to choose blood-fed female mosquitoes in the genus Anopheles as its preferred prey.

Mosquitoes in the genus Anopheles are best known as the vectors of malaria and E. culicivora is the first predator that has been found to single out Anopheles as prey. In a sated condition, E. culicivora´s preference held regardless of the sex or age of the spider. When fasted, larger spiders chose both mosquito choices (sympatric mosquitoes of different genera) in equal numbers, but the smaller E. culicivora maintained their preference for Anopheles.

Anopheles holds its body at a 45 degree angle relative to the substrate when resting, whereas other mosquitoes rest with their bodies parallel to the surface of the substrate. We investigated whether the characteristic resting posture of Anopheles was a cue E. culicivora uses to distinguish these mosquitoes from others. To do this we drew 3D virtual mosquitoes whose movement was based on frame-by-frame copying of digital video footage of grooming Anopheles. The use of virtual mosquitoes eliminated variables except the variable in question. We found the single most important visual cue used to distinguish Anopheles mosquitoes is its resting position. Finding a predator that chooses Anopheles as its preferred prey shows that we should not abandon efforts to search for avenues for the biological control of malaria.

Ximena Nelson | alfa
Further information:
http://www.plosone.org
http://dx.doi.org/10.1371/journal.pone.0000132

Further reports about: Anopheles Malaria Predator culicivora

More articles from Life Sciences:

nachricht Discovery of a Key Regulatory Gene in Cardiac Valve Formation
24.05.2017 | Universität Basel

nachricht Carcinogenic soot particles from GDI engines
24.05.2017 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

Im Focus: Using graphene to create quantum bits

In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.

In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

Physicists discover mechanism behind granular capillary effect

24.05.2017 | Physics and Astronomy

Measured for the first time: Direction of light waves changed by quantum effect

24.05.2017 | Physics and Astronomy

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>