Wasp turn spiders into zombies - VIDEO PDF Print E-mail
Sunday, 16 August 2015 06:00
Japanese scientists have described one of the most extreme acts of parasitic manipulation. They watched the merciless larvae parasitic wasps species Reclinervellus nielseni converted Cyclosa argenteoalba spider species into zombies make their victims feverishly to build their home and then killed, when the benefits of the "host" is exhausted. Secret weapon wasp is that the authors call extraordinarily manipulative concentrated substance is likely implicated based on hormones. Keidzo TakasUKa (Keizo TakasUKa) and his colleagues at the University of Kobe came to their conclusions after studied in the laboratory spiders collected in Japanese cities and Tamba Sasayama. The researchers noticed that some of arthropods have been previously struck by parasitic wasps R. nielseni, which lay their eggs in or on the body of a spider. The adult arthropod bites, causing temporary paralysis, and infect their larvae, which is fixed, caving in the spider body and constantly sucking his blood. As scientists have found out, and then something strange began to happen. Each of the infected spiders began to work tirelessly, and about 10 hours built an incredibly strong network and cocoon. This happened just before the moment when the wasp larvae pupate going. The resulting fabric contain an incredible amount of fibers and were about 2,7-40 times stronger than the networks that the spider create for themselves to relax and catch prey. After the special fabric of the Web were built, the larvae moved with his victim in a special cocoon beckon arthropods and kill. Then, within 10 days of the larva develops into a safe cocoon to adult, protected from predators. TakasUKa and his colleagues suspect that the larvae injected his victims any connection. Manipulative substance interacts with the endocrine system of the spider, which leads to hyperactivity and unusual behavior during network construction. The scientific article group TakasUKa edition was published Journal of Experimental Biology. We add that this is not the first time that parasites control the behavior of their hosts for selfish reasons. For example, before we wrote about how a different kind of parasitic wasps turns into a zombie ladybugs. "Love" wasps and dragonflies, which sometimes hitchhiking. As it turns out, it can be turned into a zombie, even a plant, there is a capacity of some bacteria. Worms-Nematomorpha develop inside the bodies of crickets and grasshoppers, and then force them to commit suicide by jumping into the water, where the adult worm leaves its prey and begins to independent life. In humans, some parasites can multiply in the brain, which can lead to behavioral changes (from loss of memory to self-mutilation).