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Combined effects of extrinsic and intrinsic factors on otolith chemistry: implications for environmental reconstructions


Barnes, TC and Gillanders, BM, Combined effects of extrinsic and intrinsic factors on otolith chemistry: implications for environmental reconstructions, Canadian Journal of Fisheries and Aquatic Sciences, 70, (8) pp. 1159-1166. ISSN 0706-652X (2013) [Refereed Article]

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DOI: doi:10.1139/cjfas-2012-0442


Otolith chemistry is widely used to understand patterns of fish movement and habitat use, with significant progress made in understanding the influence of environmental factors on otolith elemental uptake. However, few studies consider the interactive effect that environmental and genetic influences have on otolith chemistry. This study assessed the influence of salinity, temperature, and genetics on the incorporation of three key elements (strontium (Sr), barium (Ba), and magnesium (Mg)) into the otoliths of two discrete stocks of mulloway (Argyrosomus japonicus) fingerlings reared in captivity. Elemental analysis via laser ablation inductively coupled plasma mass spectrometry found that stock (genetics) had a significant interactive effect on otolith Sr:Ca (salinity temperature stock) and Ba:Ca (salinity stock), but did not affect Mg:Ca incorporation. Mg:Ca showed a positive relationship with temperature for both stocks. The incorporation of some elements into the otoliths of fish is the result of complex interactions between extrinsic and intrinsic factors. These findings highlight the necessity to also consider stock along with environmental variables when using trace elemental signatures to reconstruct the environmental histories of fish.

Item Details

Item Type:Refereed Article
Keywords:otolith chemistry, environmental history, life history, mulloway
Research Division:Biological Sciences
Research Group:Biochemistry and cell biology
Research Field:Analytical biochemistry
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Environmental policy, legislation and standards
Objective Field:Environmental protection frameworks (incl. economic incentives)
UTAS Author:Barnes, TC (Dr Thomas Barnes)
ID Code:126458
Year Published:2013
Web of Science® Times Cited:3
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2018-06-13
Last Modified:2018-07-23

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