title: [The correlation variability of the morphometric traits in 4 species of ixodid tick species (Ixodidae)].
abstract: Correlation analysis of 10 characters was run in three species of Dermacentor, D. nuttalli, D. ushakovae, D. niveus, and in Ixodes persulcatus, separately for each phase and sex. Correlation coefficients are very low in larvae of all species. In male nymphs correlation coefficients are on the same level in all species while the correlation coefficient level in female nymphs reflects the degree of independence of the development of characters. This defines the degree of manifestation of sexual dimorphism at the nymphal phase: the more rigid the connections between the characters the less number of characters shows sexual differences. At the phase of imago the lowest correlation coefficients are in I. persulcatus. This species displays most distinct differences in the morphology of females and males. On the basis of comparison of correlation and variability coefficients the functional role of the characters is discussed.
authors.forename: O V
authors.initials: OV
authors.lastname: Voltsit
mesh_terms: D000818:Animals; D003870:Dermacentor / Q000033:anatomy & histology; D005260:Female; D014644:Genetic Variation; D007814:Larva / Q000033:anatomy & histology; D008297:Male; D009758:Nymph / Q000033:anatomy & histology; D013045:Species Specificity; D013987:Ticks / Q000033:anatomy & histology*
vernacular_title: Korreliatsionnaia izmenchivost' morfometricheskikh priznakov u chetyrekh vidov iksodovykh kleshcheĭ (Ixodidae).