@article{fdi:010058950,
  title = {{B}ody size and shape evolution in host races of the tick {I}xodes uriae},
  author = {{D}ietrich, {M}. and {B}eati, {L}. and {E}lguero, {E}ric and {B}oulinier, {T}. and {M}c{C}oy, {K}. {D}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he tick {I}xodes uriae is a common ectoparasite of seabirds, and is widely distributed across the circumpolar regions of both hemispheres. {P}revious work demonstrated the existence of genetically distinct host races of this ectoparasite, occurring across its current range. {T}he objective of the present study was to examine whether these host races have evolved measurable morphological differences. {W}e measured a set of morphological variables on 255 non-engorged ticks (nymphs and adults) collected from three sympatrically occurring host species in the {N}orth {A}tlantic. {G}enotyping at eight microsatellite markers enabled us to analyse the relationship between patterns of morphological and neutral genetic variation. {M}ultivariate analyses showed that most morphological variation was associated with size differences among tick individuals. {B}ody size differed among races, but only in adult life stages. {A} linear discriminant analysis based on shape variation revealed three distinct morphological clusters corresponding to the three tick host races. {T}hese results, along with correlated patterns of host-related genetic variation, suggest that differences among host-related groups are not simply the result of phenotypic plasticity or drift, but rather reflect host-associated adaptations. {E}xperimental work and observations across the range of {I}.?uriae will now be required to test the genetic basis and adaptive nature of morphological differences.},
  keywords = {adaptation ; bird ; morphometry ; parasite ; sympatric speciation ; {NORVEGE}},
  booktitle = {},
  journal = {{B}iological {J}ournal of the {L}innean {S}ociety},
  volume = {108},
  numero = {2},
  pages = {323--334},
  ISSN = {0024-4066},
  year = {2013},
  DOI = {10.1111/j.1095-8312.2012.02021.x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010058950},
}