Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/68312
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Type: Journal article
Title: Decoding fingerprints: elemental composition of vertebrae correlates to age-related habitat use in two morphologically similar sharks
Author: Tillett, B.
Meekan, M.
Parry, D.
Munksgaard, N.
Field, I.
Thorburn, D.
Bradshaw, C.
Citation: Marine Ecology-Progress Series, 2011; 434:133-143
Publisher: Inter-research
Issue Date: 2011
ISSN: 0171-8630
1616-1599
Statement of
Responsibility: 
Bree J. Tillett, Mark G. Meekan, David Parry, Niels Munksgaard, Iain C. Field, Dean Thorburn and Corey J. A. Bradshaw
Abstract: We compare vertebral microchemistry with previously described age-related movement patterns of bull sharks Carcharhinus leucas and pig-eye sharks C. amboinensis within coastal waters of north Australia. Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) quantified the chemical signatures of nursery habitats within the vertebrae of juvenile and adult sharks. We examined evidence for adults returning to these habitats by applying LA-ICP-MS along a growth axis of their vertebrae. We transposed chemical signatures with growth increments in adult vertebrae to correlate with age estimates. Unique elemental signatures were identified in each of the freshwater nurseries, but we did not find them in adult vertebrae. Age-specific changes in vertebral microchemistry in mature female bull sharks correlate with periodic returns every 1 to 2 yr to less saline environments to pup. We were unable to discriminate among natal habitats of pig-eye sharks using elemental fingerprints, and age-specific changes in vertebral microchemistry were also absent. We conclude that changes in vertebral microchemistry correlate with known habitat use patterns of the bull and pig-eye sharks, showing the potential of vertebral microchemistry to discern movement patterns in sharks.
Rights: Copyright © 2011 Inter-Research.
RMID: 0020112344
DOI: 10.3354/meps09222
Appears in Collections:Earth and Environmental Sciences publications
Environment Institute Leaders publications

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