Tri-Trophic Impacts of Bt-Transgenic Maize on Parasitoid Size and Fluctuating Asymmetry in Native vs. Novel Host-Parasitoid Interactions in East Africa

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dc.contributor.authorNdolo, Dennis O.
dc.contributor.authorSonga, Josephine M.
dc.contributor.authorLövei, Gábor L.
dc.date.accessioned2022-05-02T17:47:28Z
dc.date.available2022-05-02T17:47:28Z
dc.date.issued2018
dc.description.abstractEnvironmental stress can affect trait size and cause an increase in the fluctuating asymmetry (FA) of bilateral morphological traits in many animals. For insect parasitoids, feeding of hosts on transgenic maize, expressing a Bacillus thuringiensis toxin gene is a potential environmental stressor. We compared the size of antennae, forewings, and tibia, as well as their FA values, in two parasitoids developed on two East African host species feeding on non-transgenic vs. transgenic maize. The two lepidopteran stem-borer hosts were the native Sesamia calamistis Hampson (Lepidoptera: Noctuidae) and a recent invader, Chilo partellus Swinhoe (Lepidoptera: Crambidae). The two braconid parasitoids were the native, gregarious larval endoparasitoid Cotesia sesamiae and the recently introduced Cotesia flavipes. Both parasitoids attacked both hosts, creating evolutionarily old vs. novel interactions. Transient feeding of hosts on transgenic maize had various effects on FA, depending on trait as well as the host and parasitoid species. These effects were usually stronger in evolutionarily novel host–parasitoid associations than in the older, native ones. These parameters have capacity to more sensitively indicate the effects of potential stressors and merit further consideration.en_US
dc.identifier.citationNdolo, D. O., Songa, J. M., & Lövei, G. L. (2018). Tri-Trophic Impacts of Bt-Transgenic Maize on Parasitoid Size and Fluctuating Asymmetry in Native vs. Novel Host-Parasitoid Interactions in East Africa. Insects, 9(2), 38. doi:10.3390/insects9020038en_US
dc.identifier.other10.3390/insects9020038
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/3132
dc.language.isoenen_US
dc.publisherInsectsen_US
dc.subjectGM plantsen_US
dc.subjectBiosafetyen_US
dc.subjectNatural enemiesen_US
dc.subjectMorphological traitsen_US
dc.subjectEnvironmental stressen_US
dc.subjectStem borersen_US
dc.subjectEcosystem servicesen_US
dc.titleTri-Trophic Impacts of Bt-Transgenic Maize on Parasitoid Size and Fluctuating Asymmetry in Native vs. Novel Host-Parasitoid Interactions in East Africaen_US
dc.typeArticleen_US
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