Fitting the Gompertz function to dose-response data of larval tick populations

We are excited to announce that the repository will soon undergo an upgrade, featuring a new look and feel along with several enhanced features to improve your experience. Please be on the lookout for further updates and announcements regarding the launch date. We appreciate your support and look forward to unveiling the improved platform soon.

Show simple item record

dc.contributor.author Spickett, Arthur M.
dc.contributor.author Van Ark, H.
dc.contributor.editor Verwoerd, Daniel Wynand
dc.date.accessioned 2014-09-01T11:13:03Z
dc.date.available 2014-09-01T11:13:03Z
dc.date.created 2013
dc.date.issued 1990
dc.description The articles have been scanned in colour with a HP Scanjet 5590; 600dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format. en
dc.description.abstract Samples of 6, 1st generation larval populations of Boophilus decoloratus, originating from field collected females, were subjected to increasing doses of the organophosphate acaricide, Dioxathion. The dose-response relationship for 3 populations showed random heterogeneity, where systematic deviations from the linear probit lines were observed for the other 3 populations. Logistic and Gompertz regressions were also fitted for all 6 populations. Probit regressions fitted best for 2 populations exhibiting heterogeneous responses. The logistic regression fitted best for 1 population with heterogeneous responses and 1 population with systematic deviating responses. The Gompertz regression fitted best for the 2 remaining populations exhibiting systematic deviating responses. The Gompertz function may be useful in describing the dose-response relationship obtained for certain acaricidal toxicity tests. en
dc.description.librarian mn2014
dc.identifier.citation Spickett, AM & Van Ark, H 1990, 'Fitting the Gompertz function to dose-response data of larval tick populations’, Onderstepoort Journal of Veterinary Research, vol. 57, no. 2, pp. 115-118. en
dc.identifier.issn 0330-2465
dc.identifier.uri http://hdl.handle.net/2263/41877
dc.language.iso en en
dc.publisher Published by the Government Printer, Pretoria. en
dc.rights ©South Africa. Dept. of Agricultural Technical Services. ©University of Pretoria. Dept. of Library Services (digital). en
dc.subject Veterinary medicine en
dc.subject.lcsh Veterinary medicine -- South Africa
dc.title Fitting the Gompertz function to dose-response data of larval tick populations en
dc.type Article en


Files in this item

This item appears in the following Collection(s)

Show simple item record