Mechanisms contributing to the competitive success of the invasive fruit fly Bactrocera invadens over the indigenous mango fruit fly, Ceratitis cosyra: the role of temperature and resource pre-emption

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dc.contributor.authorOgol, C.K.P.O.
dc.contributor.authorRwomushana, I.
dc.contributor.authorEkesi, S.
dc.contributor.authorGordon, I.
dc.date.accessioned2014-06-03T08:19:03Z
dc.date.available2014-06-03T08:19:03Z
dc.date.issued2009-10
dc.descriptionDOI: 10.1111/j.1570-7458.2009.00897.xen_US
dc.description.abstractWe investigated the influence of temperature and infestation sequence on interspecific competition between two fruit flies: an invasive (Bactrocera invadens Drew, Tsuruta & White, (B) and a native (Ceratitis cosyra Walker, C) (both Diptera: Tephritidae) species. Mango fruits [Mangifera indica L. (Anacardiaceae)] were co-infested with larvae at different constant temperatures (15, 20, 25, and 30 °C) and relative humidity of 50 ± 8%, using different infestation sequences at each temperature (BC together; BC/CB 1, 2, and 3 days apart). There were significant effects of competition in most experimental treatments, resulting in reduced larval survival, pupal mass, and adult emergence for both species. At most of the infestation/temperature combinations, C. cosyra was clearly the inferior competitor. The only exception was at 20 °C when the outcome depended on the sequence of infestation: no C. cosyra survived when the sequence was BC, but more C. cosyra than B. invadens survived when it was CB. At 15 °C, all C. cosyra larvae died, while the development of B. invadens was prolonged and adult emergence reduced. We conclude that resource pre-emption and fluctuations in temperature in mango agroecosystems help to explain observed shifts in dominance between B. invadens and C. cosyra on mango in many parts of Africa. The small window of competitive superiority for C. cosyra at 20 °C and CB infestation sequence, together with other factors such as fecundity and alternative hosts, may allow for co-existence in some environments.en_US
dc.identifier.citationEntomologia Experimentalis et Applicata Volume 133, Issue 1, pages 27–37, October 2009en_US
dc.identifier.issn0013-8703
dc.identifier.other1570-7458
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/9746
dc.language.isoenen_US
dc.publisherWileyen_US
dc.subjectnative speciesen_US
dc.subjectcompetitionen_US
dc.subjectdisplacementen_US
dc.subjectinfestation sequenceen_US
dc.subjectDipteraen_US
dc.subjectTephritidaeen_US
dc.subjectmangoen_US
dc.subjectMangiferaen_US
dc.titleMechanisms contributing to the competitive success of the invasive fruit fly Bactrocera invadens over the indigenous mango fruit fly, Ceratitis cosyra: the role of temperature and resource pre-emptionen_US
dc.typeArticleen_US
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