Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/68769
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Type: Journal article
Title: Nautilus at risk - estimating population size and demography of Nautilus pompilius
Author: Dunstan, A.
Bradshaw, C.
Marshall, N.
Citation: PLoS One, 2011; 6(2):1-9
Publisher: Public Library of Science
Issue Date: 2011
ISSN: 1932-6203
1932-6203
Statement of
Responsibility: 
Andrew Dunstan, Corey J. A. Bradshaw and Justin Marshall
Abstract: The low fecundity, late maturity, long gestation and long life span of Nautilus suggest that this species is vulnerable to over-exploitation. Demand from the ornamental shell trade has contributed to their rapid decline in localized populations. More data from wild populations are needed to design management plans which ensure Nautilus persistence. We used a variety of techniques including capture-mark-recapture, baited remote underwater video systems, ultrasonic telemetry and remotely operated vehicles to estimate population size, growth rates, distribution and demographic characteristics of an unexploited Nautilus pompilius population at Osprey Reef (Coral Sea, Australia). We estimated a small and dispersed population of between 844 and 4467 individuals (14.6–77.4 km−2) dominated by males (83:17 male:female) and comprised of few juveniles (<10%).These results provide the first Nautilid population and density estimates which are essential elements for long-term management of populations via sustainable catch models. Results from baited remote underwater video systems provide confidence for their more widespread use to assess efficiently the size and density of exploited and unexploited Nautilus populations worldwide.
Keywords: Animals; Models, Statistical; Immersion; Animal Migration; Conservation of Natural Resources; Population Density; Movement; Time Factors; Video Recording; Female; Male; Nautilus; Endangered Species
Rights: Copyright: © 2011 Dunstan et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
RMID: 0020110906
DOI: 10.1371/journal.pone.0016716
Grant ID: http://purl.org/au-research/grants/arc/LP0775179
Appears in Collections:Earth and Environmental Sciences publications
Environment Institute Leaders publications

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