Pre-patch experience affects the egg distribution pattern in a polyembryonic parasitoid of moth egg batches

Citation
Ts. Hoffmeister et al., Pre-patch experience affects the egg distribution pattern in a polyembryonic parasitoid of moth egg batches, ETHOLOGY, 106(2), 2000, pp. 145-157
Citations number
46
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Animal Sciences","Neurosciences & Behavoir
Journal title
ETHOLOGY
ISSN journal
0179-1613 → ACNP
Volume
106
Issue
2
Year of publication
2000
Pages
145 - 157
Database
ISI
SICI code
0179-1613(200002)106:2<145:PEATED>2.0.ZU;2-E
Abstract
According to foraging theory, female parasitoids should alter their host ch oice in response to cues that indicate a limitation of resources. We tested whether females of the polyembryonic parasitoid Ageniaspis fuscicollis (Hy menoptera: Encyrtidae), which attack egg batches of small ermine moths (Lep idoptera: Yponomeutidae), would alter their host acceptance pattern in resp onse to different pre-patch experience. We kept females of the parasitoid p rior to a patch visit under different conditions, which should indicate dif ferent levels of competition for hosts. With increased competition as pre-p atch experience, females laid more eggs per host egg and self-superparasiti zed more often, and the resultant egg distributions showed a trend from mor e regular distributions to increasingly Poisson and aggregated distribution s. Consequently, females with a pre-patch experience that would indicate lo w competition for hosts had the most even egg distributions. We conclude th at pre-patch experience of competitors may lead to a significant change of mutual interference patterns in egg-laying A. fuscicollis wasps.