The influence of elemental chemistry on the widths of otolith increments in the neon damselfish (Pomacentrus coelestis)

Kingsford, Michael J., Patterson, Heather M., and Flood, Matthew J. (2008) The influence of elemental chemistry on the widths of otolith increments in the neon damselfish (Pomacentrus coelestis). Fishery Bulletin, 106 (2). pp. 135-142.

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We examined the potential for water chemistry to affect the width of daily increments in reef fish otoliths using both mensurative and manipulative methods. We found significant differences in the widths of increments in otoliths of the neon damselfish (Pomacentrus coelestis) collected in different habitats at One Tree Island on the Great Barrier Reef. We then used manipulative experiments to determine if natural water masses (ocean water vs. lagoon plume) could produce different incremental widths in otoliths in the absence of potentially confounding factors. Fish exposed to ocean water had significantly wider otolith increments for two of the three experiments. Elemental analyses indicated that Ba/Ca ratios were significantly correlated with increment widths for two of the three experiments and Sr/Ca ratios did not correlate with increment width for any experimental period. Variation in crystal-lattice orientation did not explain differences in increment width between treatments. Differences in water chemistry can affect increment widths in otoliths of reef fishes, potentially confounding patterns previously attributed to growth rate or condition alone.

Item ID: 6340
Item Type: Article (Research - C1)
ISSN: 1937-4518
Keywords: AAC; otolith; One Tree Island; Sr; Ca; marine sciences
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Originally published in the Fishery Bulletin (2008, Vol.106, No.2)

Date Deposited: 08 Mar 2010 00:00
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 100%
SEO Codes: 96 ENVIRONMENT > 9611 Physical and Chemical Conditions of Water > 961104 Physical and Chemical Conditions of Water in Marine Environments @ 100%
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