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  4. Predation of native coccinellids by the invasive alien <i>Harmonia axyridis</i> (Coleoptera: Coccinellidae): detection in Britain by PCR-based gut analysis
 
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Predation of native coccinellids by the invasive alien <i>Harmonia axyridis</i> (Coleoptera: Coccinellidae): detection in Britain by PCR-based gut analysis

Auteur(s)
Thomas, Alison P
Trotman, Jamie
Wheatley, Angela
Aebi, Alexandre 
Institut de biologie 
Zindel, Renate
Brown, Peter M.J
In
Insect conservation and diversity, Wiley, 2013/6/1/20-27
Mots-clés
  • <i>Adalia bipunctata</i>
  • <i>Adalia decempunctata</i>
  • COI
  • gut contents
  • <i>Harmonia axyridis</i>
  • IGP
  • invasive species
  • PCR
  • <i>Adalia bipunctata<...

  • <i>Adalia decempuncta...

  • COI

  • gut contents

  • <i>Harmonia axyridis<...

  • IGP

  • invasive species

  • PCR

Résumé
1. The harlequin ladybird, <i>Harmonia axyridis</i>, is an invasive alien species that arrived in Britain in 2003 and has spread across most of the country. <br> 2. This spread has been accompanied by a decline in some native coccinellid species, in particular, the two spot ladybird <i>Adalia bipunctata</i> and the ten spot ladybird <i>Adalia decempunctata</i>. One reason for this decline could be intraguild predation (IGP) of the <i>Adalia</i> species by <i>H. axyridis</i>. <br> 3. A DNA-based approach was used to look for evidence of coccinellid IGP in the wild. <i>Adalia bipunctata</i>- and <i>A. decempunctata</i>-specific Polymerase chain reaction primers were developed to analyse the gut contents of field collected <i>H. axyridis</i> larvae for the presence of <i>Adalia</i> DNA. <i>Harmonia axyridis</i> larvae (156) were collected from lime trees at four sites in eastern England over 3 years. <br> 4.  <i>Adalia bipunctata</i> DNA was detected in 7.7% and <i>A. decempunctata</i> DNA in 4.5% of <i>H. axyridis</i> larvae. DNA from both <i>Adalia</i> species was detected in two larvae. <br> 5. This is the first demonstration of specific IGP interactions between <i>H. axyridis</i> and other coccinellid species in wild populations in Britain.
Identifiants
https://libra.unine.ch/handle/123456789/8256
_
10.1111/j.1752-4598.2012.00184.x
Type de publication
journal article
Dossier(s) à télécharger
 main article: Thomas_A.-Predation_of_native-20140908.pdf (780.39 KB)
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