Offspring genetic structure reveals mating and nest infestation behaviour of an invasive parasitic fly (Philornis downsi) of Galapagos birds

Dudaniec, Rachael Y., Gardner, Michael G. and Kleindorfer, Sonia (2010) Offspring genetic structure reveals mating and nest infestation behaviour of an invasive parasitic fly (Philornis downsi) of Galapagos birds. Biological Invasions, 12 3: 581-592. doi:10.1007/s10530-009-9464-x


Author Dudaniec, Rachael Y.
Gardner, Michael G.
Kleindorfer, Sonia
Title Offspring genetic structure reveals mating and nest infestation behaviour of an invasive parasitic fly (Philornis downsi) of Galapagos birds
Journal name Biological Invasions   Check publisher's open access policy
ISSN 1387-3547
1573-1464
Publication date 2010-03-01
Sub-type Article (original research)
DOI 10.1007/s10530-009-9464-x
Volume 12
Issue 3
Start page 581
End page 592
Total pages 12
Place of publication Dordrecht, The Netherlands
Publisher Springer Netherlands
Language eng
Formatted abstract
The natural reproductive behaviour of invasive insects is pivotal knowledge for managing species of ecological or economic concern. We use microsatellites to examine female multiple mating and multiple nest infestations in the introduced parasitic fly, Philornis downsi, which causes high mortality in endemic birds on the Galápagos Islands. We analyse larvae and pupae within 57 nests from Santa Cruz and Floreana Islands in both the highland and lowland habitats. Sib-ship reconstructions of offspring revealed that up to five females may infest a single nest, while multiple mating in females was frequent (65% of reconstructed maternal genotypes), with an average of 1.91 (±0.06 SE) males per female. Genetic relatedness (R) of offspring within nests was generally low, though lowland nests on Floreana had higher R than highland nests. Knowledge of the reproductive behaviour of P. downsi is necessary for modelling appropriate management strategies, in particular, the sterile insect technique, for which success is greatly influenced by female multiple mating.
Keyword Philornis downsi
Darwin's finches
Female multiple mating
Sterile insect technique
Ectoparasitism
Mediterranean Fruit-Fly
Finch Geospiza-Fuliginosa
Sterile Insect Technique
Darwins Finches
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Geography, Planning and Environmental Management Publications
ERA 2012 Admin Only
 
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