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Published (Version of Record)CC BY-NC-ND V4.0, Open Access
Journal article
Determination of population age structure from the survivorship of individuals of unknown ages in unicorns and platypuses
Australian journal of zoology, Vol.73(3)
2025
Appears in Open Access via Read & Publish Agreements
Abstract
Population age structure is an important parameter for wildlife population modelling. However, for many species it is not possible to accurately assess the age of adult individuals. We present a hypothetical example to illustrate a previously described method of determining population age structure from the survivorship of individuals of unknown ages that to our knowledge is unused in the fields of zoology and ecology. We then apply this method to data collected over 10 years for a population of wild platypuses (Ornithorhynchus anatinus), a species whose adult individuals cannot be accurately aged and for which only limited data on life history characteristics are available. Our results show a lower mortality rate over the first years of life of platypuses than the one previous study available for comparison, and suggested a Type I or Type III survivorship curve.
Details
- Title
- Determination of population age structure from the survivorship of individuals of unknown ages in unicorns and platypuses
- Authors/Creators
- J. W. MacgregorP. A. FlemingO. WadeR. DonaldsonK. S. Warren
- Publication Details
- Australian journal of zoology, Vol.73(3)
- Publisher
- CSIRO PUBLISHING
- Number of pages
- 10
- Identifiers
- 991005761533607891
- Copyright
- © 2025 The Author(s) (or their employer(s))
- Murdoch Affiliation
- Centre for Terrestrial Ecosystem Science and Sustainability; School of Environmental and Conservation Sciences; School of Veterinary Medicine
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.35 Zoology & Animal Ecology
- 3.35.721 Rodent Ecology
- Web Of Science research areas
- Zoology
- ESI research areas
- Plant & Animal Science