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Host-associated differences in morphometric traits of parasitic larvae Hirsutiella zachvatkini (Actinotrichida: Trombiculidae).

Moniuszko H, Zaleśny G, Mąkol J - Exp. Appl. Acarol. (2015)

Bottom Line: Statistically significant differences were observed for metric characters of the legs as opposed to the scutum.In view of the conspecificity of the mites, supported by comparison of COI gene products obtained from larvae and laboratory-reared deutonymphs, the observed variation is attributed to phenotypic plasticity.The knowledge of larval morphology, including intraspecific variation of metric characters, supported by molecular and host range data, places H. zachvatkini among the most comprehensively defined members of Trombiculidae.

View Article: PubMed Central - PubMed

Affiliation: Institute of Biology, Department of Invertebrate Systematics and Ecology, Wrocław University of Environmental and Life Sciences, Kożuchowska 5b, 51-631, Wrocław, Poland.

ABSTRACT
Examination of host-associated variation in the chigger mite Hirsutiella zachvatkini (Schluger) revealed morphological differences among larvae infesting sympatric hosts: Apodemus agrarius, Apodemus flavicollis and Myodes glareolus. The analysis included 61 variables of larvae obtained from their gnathosoma, idiosoma and legs (measurements and counts). Statistically significant differences were observed for metric characters of the legs as opposed to the scutum. In view of the conspecificity of the mites, supported by comparison of COI gene products obtained from larvae and laboratory-reared deutonymphs, the observed variation is attributed to phenotypic plasticity. The knowledge of larval morphology, including intraspecific variation of metric characters, supported by molecular and host range data, places H. zachvatkini among the most comprehensively defined members of Trombiculidae.

No MeSH data available.


Related in: MedlinePlus

Results of canonical analysis of Hirsutiella zachvatkini obtained from three host species. Plot generated based on 23 variables measured in 133 specimens. Symbols denoting host species: squares—Apodemus flavicollis, circles—Apodemus agrarius, black diamonds—Myodes glareolus
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Fig1: Results of canonical analysis of Hirsutiella zachvatkini obtained from three host species. Plot generated based on 23 variables measured in 133 specimens. Symbols denoting host species: squares—Apodemus flavicollis, circles—Apodemus agrarius, black diamonds—Myodes glareolus

Mentions: The model generated by DFA is provided in Table 2. The Roots 1 and 2 account for 76.8 and 100 % of the total variation within H. zachvatkini collected from three host species. The variables that play the major role in this differentiation are, in descending order, Leg III, PaTa, PaTi, S, dmt and PSB. The means of canonical values (Table 3) indicate that Root 1 discriminates the specimens of H. zachvatkini obtained from M. glareolus. When the canonical scores from the discriminant analysis are plotted and viewed (Fig. 1), it can be seen that representatives of H. zachvatkini collected from M. glareolus [with the total percentage of correctly classified specimens accounting for 95.2 % (Table 3)] are clearly separated from the mites collected from Apodemus mice.Table 2


Host-associated differences in morphometric traits of parasitic larvae Hirsutiella zachvatkini (Actinotrichida: Trombiculidae).

Moniuszko H, Zaleśny G, Mąkol J - Exp. Appl. Acarol. (2015)

Results of canonical analysis of Hirsutiella zachvatkini obtained from three host species. Plot generated based on 23 variables measured in 133 specimens. Symbols denoting host species: squares—Apodemus flavicollis, circles—Apodemus agrarius, black diamonds—Myodes glareolus
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4516858&req=5

Fig1: Results of canonical analysis of Hirsutiella zachvatkini obtained from three host species. Plot generated based on 23 variables measured in 133 specimens. Symbols denoting host species: squares—Apodemus flavicollis, circles—Apodemus agrarius, black diamonds—Myodes glareolus
Mentions: The model generated by DFA is provided in Table 2. The Roots 1 and 2 account for 76.8 and 100 % of the total variation within H. zachvatkini collected from three host species. The variables that play the major role in this differentiation are, in descending order, Leg III, PaTa, PaTi, S, dmt and PSB. The means of canonical values (Table 3) indicate that Root 1 discriminates the specimens of H. zachvatkini obtained from M. glareolus. When the canonical scores from the discriminant analysis are plotted and viewed (Fig. 1), it can be seen that representatives of H. zachvatkini collected from M. glareolus [with the total percentage of correctly classified specimens accounting for 95.2 % (Table 3)] are clearly separated from the mites collected from Apodemus mice.Table 2

Bottom Line: Statistically significant differences were observed for metric characters of the legs as opposed to the scutum.In view of the conspecificity of the mites, supported by comparison of COI gene products obtained from larvae and laboratory-reared deutonymphs, the observed variation is attributed to phenotypic plasticity.The knowledge of larval morphology, including intraspecific variation of metric characters, supported by molecular and host range data, places H. zachvatkini among the most comprehensively defined members of Trombiculidae.

View Article: PubMed Central - PubMed

Affiliation: Institute of Biology, Department of Invertebrate Systematics and Ecology, Wrocław University of Environmental and Life Sciences, Kożuchowska 5b, 51-631, Wrocław, Poland.

ABSTRACT
Examination of host-associated variation in the chigger mite Hirsutiella zachvatkini (Schluger) revealed morphological differences among larvae infesting sympatric hosts: Apodemus agrarius, Apodemus flavicollis and Myodes glareolus. The analysis included 61 variables of larvae obtained from their gnathosoma, idiosoma and legs (measurements and counts). Statistically significant differences were observed for metric characters of the legs as opposed to the scutum. In view of the conspecificity of the mites, supported by comparison of COI gene products obtained from larvae and laboratory-reared deutonymphs, the observed variation is attributed to phenotypic plasticity. The knowledge of larval morphology, including intraspecific variation of metric characters, supported by molecular and host range data, places H. zachvatkini among the most comprehensively defined members of Trombiculidae.

No MeSH data available.


Related in: MedlinePlus