Studies On The Mating Behavior And Biology Of Tetrancychus Vienensis

Behavioral research was one of the hottest topics on international animal studies in recent years. Tetranychus viennensis Zacher was not only an important harmful mite in the North fruit production, but also belonged to the micro miniature mites. And there was too much difficulty to control. In particular, there was also a direct operational difficulty on the study of their behavior. The same as other digenetic propagation, the mating of Tetranychus viennensis Zacher was the base of the population establishment, propagation and growth. The research on its behavior will be more conducive to understanding the natural occurrence and the law of nature, and will provide important theoretical basis to the production control management.The study was done through observing the mating behavior and biology of Tetranychus viennensis Zacher in order to know their reproductive law well, enrich the behavior theory, and find their mating system and a new control method. Put the leaves with mites into culture dish and keep their humidity. By using anatomical lens to observe and record the mating behavior of Tetranychus viennenis Zacher. Then compared its behavior, biology and their time of mating with different times, delayed time and starvation time. What's more, the time dynamics of the adults and the percentage of the female adults were studied.The results of research showed that the mating of Tetranychus viennenis Zacher is different with others. The male mites assisted females molting and then they mated. When they were mating, the female was above. The male drilled down to the bottom of the female's abdomen and curled its body. The male's penis inserted into the female. The male was dominant and competed with each other. Tetranychus viennensis Zacher can mate several times in 24 hours. After the third time it is an invalid mating because the capacity of female spermatheca is limited. The first mating time was the longest and after that mating time was obviously short. But the time the male sought the female was longer. With the increase of the mating times, the fecundity and the hatchability have increased, but females'longevity was significantly shortened. The male is dominant to look for the female to mate. The descendants of parthenogenesis are all female, and the times of mating affect sex ratio of offspring. The results of research showed male mites assisted females molting and then they mated. The first mating time was the longest and after that mating time was obviously short. With the increase of the mating times, the fecundity and the hatchability have increased, but females'longevity were significantly shortened. Tetranychus viennensis Zacher can mate several times in 24 hours. The male is dominant to look for the female to mate. After the third time it is an invalid mating because the capacity of female spermatheca is limited. The descendants of parthenogenesis are all female, and the times of mating affect sex ratio of offspring.When delayed mating time, the effect on offspring sex ratio was not significant. Delayed 12 h and 24 h of the mating, the adults'longevity, fecundity, and the hatchability were not significant. Delayed 48 h and 24 h of the mating, the adults'longevity, fecundity, and the hatchability were significant. With the delay of mating time, the females'longevity increased, but the fecundity and the hatchability reduced.On the female adults with different starvation time to deal with, the result showed that the scope of a certain level of hunger (starvation 12 h), the crawling speed increased. As more than a certain limit (starvation 24 h), along with the increase in the extent of hunger, the crawling speed decreased. With the starvation time increased, the foraging time decreased, while the feeding time increased slightly at first, and then decreases. The foraging time was not significant with starvation 12 h and 24 h. But they were significant with 36 h. It's significant with starvation 0 h, 24 h and 36 h. The feeding time was not significant with starvation 0 h, 12 h and 24 h. But it's significant with starvation 36 h.The trend of the time dynamics of the adults was similar. The male curve was gentler than female. The number of female adults was significantly more than the male. The percentage of the female adults curve was gentle and it decreased and then increased. When it's rain, it's not conducive to the mite population growth.