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Phoretic dispersal of entomopathogenic nematodes by Hylobius abietis

Phoretic dispersal of entomopathogenic nematodes by Hylobius abietis AbstractPhoresis is a strategy in which one organism (the phoretic) attaches toanother (the host) for the implied purpose of dispersal and is valuable forsmall flightless invertebrates with limited mobility. Previous work hasshown that the relatively immobile larvae of Hylobius abietis (the largepine weevil) are highly susceptible to entomopathogenic nematodes (EPN) andsupport nematode reproduction whereas adults do not. Here, we demonstratethat the infective juveniles (IJ) of two species of EPN, Heterorhabditismegidis and Steinernema carpocapsae, can use the resistant but highly mobileadults of H. abietis for phoretic dispersal. The ability to use adult H.abietis for phoresis depended on nematode species and habitat (sand vs peat)and there was no evidence of sex-biased dispersal in S. carpocapsae forwhich the IJ are dioecious. We hypothesise that phoretic dispersal may be asignificant mechanism to avoid sibling competition and inbreeding in EPN,which produce tens of thousands of offspring at point sources in arelatively impenetrable habitat. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematology Brill

Phoretic dispersal of entomopathogenic nematodes by Hylobius abietis

Nematology , Volume 11 (3): 9 – Jan 1, 2009

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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
1388-5545
eISSN
1568-5411
DOI
10.1163/156854109X446999
Publisher site
See Article on Publisher Site

Abstract

AbstractPhoresis is a strategy in which one organism (the phoretic) attaches toanother (the host) for the implied purpose of dispersal and is valuable forsmall flightless invertebrates with limited mobility. Previous work hasshown that the relatively immobile larvae of Hylobius abietis (the largepine weevil) are highly susceptible to entomopathogenic nematodes (EPN) andsupport nematode reproduction whereas adults do not. Here, we demonstratethat the infective juveniles (IJ) of two species of EPN, Heterorhabditismegidis and Steinernema carpocapsae, can use the resistant but highly mobileadults of H. abietis for phoretic dispersal. The ability to use adult H.abietis for phoresis depended on nematode species and habitat (sand vs peat)and there was no evidence of sex-biased dispersal in S. carpocapsae forwhich the IJ are dioecious. We hypothesise that phoretic dispersal may be asignificant mechanism to avoid sibling competition and inbreeding in EPN,which produce tens of thousands of offspring at point sources in arelatively impenetrable habitat.

Journal

NematologyBrill

Published: Jan 1, 2009

Keywords: HETERORHABDITIS MEGIDIS; DISPERSAL; PHORESY; STEINERNEMA CARPOCAPSAE

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