title: [The chronological structure of the population count of the taiga tick in the Maritime Territory].
abstract: A time series analysis of 23-years observations of the Ixodes persulcatus imago dynamics was carried out. The tick were counted in forests of the western Sikhote-Alin' foothills near Ussuriysk. The fluctuations of the ticks number are quasiperiodical. They are formed by near 3-years oscillations, long-term non linear trend and accidental component. The observed process was described by means of a statistic model. This model combines the harmonic regression analysis with linear regression analysis. The determination coefficients are 90.8% and 92.7% for the descriptive and prognostic models respectively. The difference between two groups of environmental factors, which influence on the tick number, is discussed. These factors are: 1) the directly influencing factors (functional factors), 2) the factors influencing by dint of natural rhythms being general for a biocoenosis (synchronizing factors).
authors.forename: Iu S
authors.initials: IuS
authors.lastname: Korotkov
authors.forename: N M
authors.initials: NM
authors.lastname: Okulova
mesh_terms: D000818:Animals; D002909:Chronobiology Phenomena; D018884:Ixodes; D008685:Meteorological Concepts; D011156:Population Density; D011157:Population Dynamics; D012044:Regression Analysis; D012621:Seasons; D012800:Siberia; D013997:Time Factors