Senckenberg Research

traps and laboratory stuff
 

Three different types of traps are used during our field work. Click on the respective icon to get more information.

 

EVS-Trap (Encephalitis-Vector-Survey)


BG-Sentinel Trap


Ovitraps

 

EVS-Trap (Encephalitis-Vector-Survey)

 

This kind of trap is the most commonly used by our scientists. Due to its low weight, it is easy to transport and to handle. As lure we use dry ice, which is placed in a container with outpouring openings. Dry ice is frozen CO2 which sublimates at a temperature of -80C, that means, it becomes gaseous without a liquid phase. Below the dry ice container is a battery-operated fan, which rotates with a speed that makes sure not to kill or damage the mosquitos but draws them in the container bag.

The traps are attached in a height of approximately 1.50 m, but also the usage in varying heights is possible. A handicap of the trap is the usage of dry ice, which has to be stored at -80C.

          

 EVS Rhön       EVS Altenstadt       EVS Zoo        

The pictures show a typical catching area for EVS-traps. The traps are usually set up in the afternoon and collected again the next morning. The samples are determined later morphologically as well as genetically (pictures: Sarah Bolius, Antje Werblow, Christian Melaun).

 

 

BG-Sentinel Trap

 

Beside the usage of CO2  it is possible to use artificial olfactory lure to attract mosquitoes. The attractant flows out directly over the fan opening, whereby the mosquitoes are lured and absorbed optimally. The trap is most commonly placed on the ground.

           

 Schlüchtern    BG-Sentinel    BG-Netz   

Catching area (Photo 1) and BG-Sentinel trap (Photo 2). The animals are absorbed by a fan and collected in a bag inside the trap, which can be easily removed (Photo 3), (pictures: Antje Werblow, Julian Münster).

 

 

Ovitraps

 

These inconspecious plastic beakers with a wooden stick are the easiest type of mosquito traps. They can be positioned on the ground and on varying heights. Usually the beakers are filled with certain kind of hay extraction or moldy rain water. This allows collecting egg clutches of different species, as well as already hatched larvae and pupae, which are grown up in the laboratory later.

       

 Ovitrap Rhön      Ovitrap Steinbruch      Ovitrap Kuhwaldstrasse   

The ovitraps are checked about once in two weeks for egg clutches or already hatched larvae (Photo 1): Ovitraps are positioned e.g. in old tree trunks (Photo 2), on the ground or hanged on trees (Photo 3). The wooden stick is clearly visible and has a smooth and a checkered side. The latter is more attractive for mosquitoes for egg deposition (pictures: Sarah Bolius; Antje Werblow).

 

 

Laborarbeit

 

After the mosquitos are caught, the species were determined morphologically as well as genetically. As soon as the animals are specified, some of them are deposited in scientific reference collections, stored in alcohol or prepared for showcases. Besides the species identification also the mosquitos abilities to transmit specific diseases are checked.

     

 Labor     genadelte Mücke     Referenzsammlung Peus    

Laboratory working place, used for the genetical determination of the mosquitos. After the identification, they are prepared for showcases, stored in alcohol and deposited in scientific reference collections (pictures: Antje Werblow).

 

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