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Life history and dynamics of a platypus (Ornithorhynchus anatinus) population: four decades of mark-recapture surveys

Scientific reports, 2015-11, Vol.5 (1), p.16073-16073, Article 16073 [Peer Reviewed Journal]

Copyright Nature Publishing Group Nov 2015 ;Copyright © 2015, Macmillan Publishers Limited 2015 Macmillan Publishers Limited ;ISSN: 2045-2322 ;EISSN: 2045-2322 ;DOI: 10.1038/srep16073 ;PMID: 26536832

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  • Title:
    Life history and dynamics of a platypus (Ornithorhynchus anatinus) population: four decades of mark-recapture surveys
  • Author: Bino, Gilad ; Grant, Tom R ; Kingsford, Richard T
  • Subjects: Age differences ; Animals ; Australia ; Dispersal ; Females ; Growth rate ; Juveniles ; Life Cycle Stages - physiology ; Life history ; Longevity ; Longevity - physiology ; Males ; Platypus - growth & development ; Platypus - physiology ; Population ; Population Dynamics ; Population growth ; Population viability ; Risk assessment ; Rivers ; Seasons ; Sensitivity analysis ; Species extinction ; Surveys and Questionnaires ; Survival
  • Is Part Of: Scientific reports, 2015-11, Vol.5 (1), p.16073-16073, Article 16073
  • Description: Knowledge of the life-history and population dynamics of Australia's iconic and evolutionarily distinct platypus (Ornithorhynchus anatinus) remains poor. We marked-recaptured 812 unique platypuses (total 1,622 captures), over four decades (1973-2014) in the Shoalhaven River, Australia. Strong sex-age differences were observed in life-history, including morphology and longevity. Apparent survival of adult females (Φ = 0.76) were higher than adult males (Φ = 0.57), as in juveniles: females Φ = 0.27, males Φ = 0.13. Females were highly likely to remain in the same pool (adult: P = 0.85, juvenile: P = 0.88), while residency rates were lower for males (adult: P = 0.74, juvenile: P = 0.46). We combined survival, movement and life-histories to develop population viability models and test the impact of a range of life-history parameters. While using estimated apparent survival produced unviable populations (mean population growth rate r = -0.23, extinction within 20 years), considering residency rates to adjust survival estimates, indicated more stable populations (r = 0.004, p = 0.04 of 100-year extinction). Further sensitivity analyses highlighted adult female survival and overall success of dispersal as most affecting viability. Findings provide robust life-history and viability estimates for a difficult study species. These could support developing large-scale population dynamics models required to underpin a much needed national risk assessment for the platypus, already declining in parts of its current distribution.
  • Publisher: England: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 2045-2322
    EISSN: 2045-2322
    DOI: 10.1038/srep16073
    PMID: 26536832
  • Source: PubMed (Medline)
    MEDLINE
    ProQuest Central
    DOAJ Directory of Open Access Journals
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