Wing length and host location in tsetse (Glossina spp.) : implications for control using stationary baits

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dc.contributor.authorHargrove, John W.en_ZA
dc.contributor.authorEnglish, Sineaden_ZA
dc.contributor.authorTorr, Stephen J.en_ZA
dc.contributor.authorLord, Jenniferen_ZA
dc.contributor.authorHaines, Lee Rafuseen_ZA
dc.contributor.authorVan Schalkwyk, Carien_ZA
dc.contributor.authorPatterson, Jamesen_ZA
dc.contributor.authorVale, Glynen_ZA
dc.date.accessioned2019-01-15T13:41:43Z
dc.date.available2019-01-15T13:41:43Z
dc.date.issued2019-01-11
dc.date.updated2019-01-15T11:49:58Z
dc.descriptionCITATION: Hargrove, J., et al. 2019. Wing length and host location in tsetse (Glossina spp.) : implications for control using stationary baits. Parasites & Vectors, 12:24, doi:10.1186/s13071-018-3274-x.
dc.descriptionThe original publication is available at https://parasitesandvectors.biomedcentral.com
dc.description.abstractBackground: It has been suggested that attempts to eradicate populations of tsetse (Glossina spp.) using stationary targets might fail because smaller, less mobile individuals are unlikely to be killed by the targets. If true, tsetse caught in stationary traps should be larger than those from mobile baits, which require less mobility on the part of the flies. Results: Sampling tsetse in the Zambezi Valley of Zimbabwe, we found that the number of tsetse caught from stationary traps, as a percent of total numbers from traps plus a mobile vehicle, was ~5% for male G. morsitans morsitans (mean wing length 5.830 mm; 95% CI: 5.800–5.859 mm) and ~10% for females (6.334 mm; 95% CI: 6.329– 6.338 mm); for G. pallidipes the figures were ~50% for males (6.830 mm; 95% CI: 6.821–6.838 mm) and ~75% for females (7.303 mm, 95% CI: 7.302–7.305 mm). As expected, flies of the smaller species (and the smaller sex) were less likely to be captured using stationary, rather than mobile sampling devices. For flies of a given sex and species the situation was more complex. Multivariable analysis showed that, for females of both species, wing lengths changed with ovarian age and the month, year and method of capture. For G. pallidipes, there were statistically significant interactions between ovarian age and capture month, year and method. For G. m. morsitans, there was only a significant interaction between ovarian age and capture month. The effect of capture method was, however, small in absolute terms: for G. pallidipes and G. m. morsitans flies caught on the mobile vehicle had wings only 0.24 and 0.48% shorter, respectively, than flies caught in stationary traps. In summary, wing length in field samples of tsetse varies with ovarian age, capture month and year and, weakly, with capture method. Suggestions that a target-based operation against G. f. fuscipes in Kenya caused a shift towards a smaller, less mobile population of tsetse, unavailable to the targets, failed to account for factors other than capture method. Conclusions: The results are consistent with the successful use of targets to eradicate populations of tsetse in Zimbabwe. Until further, more nuanced, studies are conducted, it is premature to conclude that targets alone could not, similarly, be used to eradicate G. f. fuscipes populations in Kenya.en_ZA
dc.description.urihttps://parasitesandvectors.biomedcentral.com/articles/10.1186/s13071-018-3274-x
dc.description.versionPublisher's version
dc.format.extent13 pages
dc.identifier.citationHargrove, J., et al. 2019. Wing length and host location in tsetse (Glossina spp.) : implications for control using stationary baits. Parasites & Vectors, 12:24, doi:10.1186/s13071-018-3274-x
dc.identifier.issn1756-3305 (online)
dc.identifier.otherdoi:10.1186/s13071-018-3274-x
dc.identifier.urihttp://hdl.handle.net/10019.1/105329
dc.language.isoen_ZAen_ZA
dc.publisherBMC (part of Springer Nature)
dc.rights.holderAuthors retain copyright
dc.subjectStationary and mobile baitsen_ZA
dc.subjectTsetse-flies -- Controlen_ZA
dc.subjectTsetse-flies -- Physiologyen_ZA
dc.subjectBait markersen_ZA
dc.titleWing length and host location in tsetse (Glossina spp.) : implications for control using stationary baitsen_ZA
dc.typeArticleen_ZA
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