Is host specificity the cause or the consequence of parasite diversification: lessons from the population genetics of lice and helminths. Evolutionary Biology Meeting, Marseilles 2010
Upcoming SlideShare
Loading in...5
×
 

Is host specificity the cause or the consequence of parasite diversification: lessons from the population genetics of lice and helminths. Evolutionary Biology Meeting, Marseilles 2010

on

  • 511 views

 

Statistics

Views

Total Views
511
Views on SlideShare
511
Embed Views
0

Actions

Likes
0
Downloads
0
Comments
0

0 Embeds 0

No embeds

Accessibility

Categories

Upload Details

Uploaded via as Adobe PDF

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Is host specificity the cause or the consequence of parasite diversification: lessons from the population genetics of lice and helminths. Evolutionary Biology Meeting, Marseilles 2010 Is host specificity the cause or the consequence of parasite diversification: lessons from the population genetics of lice and helminths. Evolutionary Biology Meeting, Marseilles 2010 Presentation Transcript

  • Is host specificity the cause or the consequence of parasite diversification: lessons from the population genetics of lice and helminths Štefka, Jan1,21Natural History Museum, Cromwell Road, London, UK2Faculty of Science, University of South Bohemia and Biology Centre ASCR, České Budějovice, CZ
  • Evolution of novel taxa in parasites:host specificity vs. geografic distribution. • Host specificity and speciation in metazoan parasites – What is host specificity – Why bother – Established framework? • Timescale: long vs. short evolutionary periods
  • Timescale: long vs. short evolutionary periods Estimate the amount of co-speciations vs. host switches
  • Evolution of novel taxa in parasites:host specificity vs. geografic distribution. • Speciation and host specificity • Timescale: long vs. short evolutionary periods • Careful choise of model taxa (complexity of life-cycles and population histories…)
  • The importance of geography Štefka et al, in prep.
  • traditional taxonomymtDNA phylogeny N. parvulus N. melanotis N. trifasciatus N. macdonaldi
  • traditional taxonomymtDNA phylogeny N. parvulus N. melanotis N. trifasciatus N. macdonaldi
  • Myrsidea sp.98 specimens, 37 haps N. trifasciatus N. parvulus N. trifasciatus N. melanotis N. macdonaldi
  • Analges sp. (Acari, Astigmata)87 specimens, 71 haps N. parvulus N. trifasciatus N. melanotis N. macdonaldi
  • 7.000 YA approx. 2-3 MYA approx. 5 MYA 5-9 MYA
  • 7.000 YA approx. 2-3 MYA approx. 5 MYA 5-9 MYA Progression rule
  • Polyplax serrata genus Apodemus
  • Michaux et al., 2003, 2005 ?A. sylvaticus A. flavicollis
  • northern border of A. sylvaticus rangeA. sylvaticus A. flavicollis A. agrarius A. uralensis
  • A A. flavicollis A. sylvaticus colonizationCOI vs.Haplotypes B duplication ?+EF1α A. flavicollis C A. agrarius A. uralensis Štefka and Hypša, 2008 Martinů et al, in prep.
  • A colonizationB molecular dating -Clade A/B 1.5 Mya (1.4-1.6) -Hosts Af/As 4 Mya A duplication B Host specificity arose in allopatry
  • Ligula intestinalis s.l.
  • A TunisiaSympatric lineages,different host. spec. BMutual def. hosts Tunisia COI+COB haplotypes Bouzid et al, 2008, Int. J. Parasitol. Bouzid et al, in prep.
  • Structure 2.2; 338 tapeworms Europe Europe/Gobio TunisiaAlgeria/Barbus XCompatible with mtDNA Lake Tana (Ethiopia) B. humilis B. tsanensis B. intermedius B. brevicephalus Štefka et al., 2009, Mol. Ecol.
  • Conclusions• Host specificity arose in allopatry in P. serrata• More complex picture in L. intestinalis: some lineages arising in allopatry vs. ongoing host-dependant speciation in others.• Host specificity is at least in some cases a product of speciation processes not the motor of speciation in parasites.
  • Václav HypšaThanks to: Faculty of Science, USB, Č. Budějovice Czech Rep. Jana Martinů Faculty of Science, USB, Č. Budějovice Vince Smith Czech Rep. Entomology Dept., NHM, London UK Wafa Bouzid Université P. Sebatier, Toulouse FranceAcknowledgements:This work was supported by Grant Agency of the Czech Republic (projectNo. 206/08/1019) and by Marie Curie Fellowship (project Galápagos, no.235123, FP7-PEOPLE-IEF-2008).