Are wing size, wing shape and asymmetry related to field fitness of Trichogramma egg parasitoids?

Kolliker-Ott, Ursula M., Blows, Mark W. and Hoffmann, Ary A. (2003) Are wing size, wing shape and asymmetry related to field fitness of Trichogramma egg parasitoids?. Oikos, 100 3: 563-573. doi:10.1034/j.1600-0706.2003.12063.x

Author Kolliker-Ott, Ursula M.
Blows, Mark W.
Hoffmann, Ary A.
Title Are wing size, wing shape and asymmetry related to field fitness of Trichogramma egg parasitoids?
Journal name Oikos   Check publisher's open access policy
ISSN 0030-1299
Publication date 2003-01-01
Year available 2003
Sub-type Article (original research)
DOI 10.1034/j.1600-0706.2003.12063.x
Open Access Status
Volume 100
Issue 3
Start page 563
End page 573
Total pages 11
Place of publication Copenhagen
Publisher Blackwell Munksgaard
Language eng
Subject C1
270799 Ecology and Evolution not elsewhere classified
779999 Other
Abstract The effects of wing shape, wing size, and fluctuating asymmetry in these measures oil the field fitness of T. nr. brassicae and T. pretiosum were investigated. Trichogramma wasps mass-reared on eggs of the factitious host Sitotroga cerealella were released in tomato paddocks and those females ovipositing on Helicoverpo spp. eggs were recaptured. Comparisons of the recaptured group with a sample from the release population were used to assess fitness. Wing data were obtained by positioning landmarks on mounted forewings. Size was then measured as the centroid size computed from landmark distances, while Procrustes analysis followed by principal component analysis was used to assess wing shape. Similar findings were obtained for both Trichogramma species: fitness of wasps was strongly related to wing size and some shape dimensions, but not to the asymmetries of these measures. Wasps which performed well in the field had larger wings and a different wing shape compared to wasps from the mass reared population. Both size and the shape dimensions were linearly associated with fitness although there was also some evidence for non-linear selection on shape. The results suggest that wing shape and wing size are reliable predictors of field fitness for these Trichogramma wasps.
Keyword Ecology
Mass-reared Trichogramma
Fluctuating Asymmetry
Developmental Stability
Conservation Biology
Quality Assessment
Nr. Brassicae
Q-Index Code C1
Institutional Status UQ
Additional Notes DOI: 10.1034/j.1600-0706.2003.12063.x

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Created: Wed, 15 Aug 2007, 05:05:40 EST