Population dynamics of acarid mites in two different types of poultry raising systems in Germany

摘要

Two different types of poultry houses (conventional and trampoline rearing system) in Lower Saxony, Germany were investigated in order to determine how the drying of the litter in the trampoline system affects the acarofauna. The acarid mite Sancassania beriesei occurred in both systems. In the conventional system, S. berlesei was dominant (99.8 percent) and reached a maximum density of about 2000 mites/g of litter. The abundance of S. berlesei depended on the substrate humidity. Due to the reducedhumidity in the litter in the trampoline system, the abundance of this mite in this system was 800 times less than in a conventional one. In each chicken rearing period (about six weeks) in the conventional system, a distinct change was observed in the population of this mite. Two weeks after the beginning of each breeding period the mite population increased rapidly, and then decreased suddenly after another three weeks.