University of Otago TV Set

Effect of Investigator Disturbance on Hatching Success in Endangered Takahe

Ian Jamieson

The Takahe is a flightless New Zealand bird thought to be extinct until discovered in 1948. A management programme was introduced by the Department of Conservation to increase numbers. This lesson investigates whether nest monitoring affects nesting success.


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The data are presented in the Excel file TakaheDataAndVariables.xls.

The small samples and type of data make it necessary to use non parametric procedures for analyzing the data discussed in this study rather than a matched or paired data t-test. The non parametric tests are not in the New Zealand school syllabus but the discussion about the design of this study and interpretation of results contain worthwhile ideas.

If you have access to GenStat, you can go through the lesson Takahe-GenStat.pdf.

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Video content recorded and edited by Robert van der Vyver[1] and John Harraway[2].
Web site developed and maintained by Greg Trounson[2] and John Harraway
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1: Higher Education Development Unit, University of Otago
2: Department of Mathematics and Statistics, University of Otago