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Titre du Document
Factors affecting the evolution of virulene : nematode parasites of fig wasps as a case study
Auteur(s)
HERRE E. A. ; GRENFELL B. T. (Editeur scientifique) ; CHAPPELL L. H. (Editeur scientifique)
Résumé
The natural history of fig-pollinating wasps and their associated species-specific nematodes allows the measurement of many parameters which are relevant to testing hypotheses concerning host-parasite ecology and evolution. Within fig wasps species, it is possible to estimate lifetime reproductive success of foundress wasps as a function of presence or absence of nematode parasitism (virulence). Across species, there is a wide range of host population structures which, in turn, results in a range of opportunities for either horizontal or vertical nematode transmission. Therefore, estimates of virulence can be related to opportunities for transmission across a group of closely related hosts and their parasites. Further, the dynamics of the nematode infections over ecological and short-term evolutionary timescales can be monitored, giving added insight into the interpretation of the virulence estimates. Moreover, several scales of longer term evolutionary relationships are either known directly from fossil evidence or can be inferred from molecular data, providing deeper temporal context for the observed patterns. This combination of attributes permits detailed testing of hypotheses concerning the factors that potentially influence the evolution of virulence in host-parasite systems, and further, population and simulation models of the system that incorporate the parameter estimates can clarify the interpretation of how those factors act. There is little evidence suggesting tha
Editeur
Cambridge University Press
Identifiant
ISSN : 0031-1820 CODEN : PARAAE
Source
Parasitology (London. Print) A. 1996, vol. 111, SUP, pp. S179-S191 [bibl. : 1 p.1/4]
Langue
Anglais
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