Otolith geochemistry does not reflect dispersal history of clownfish larvae

Berumen, M. L, Walsh, H.J., Raventos, N., Planes, S., Jones, G.P., Starczak, V., and Thorrold, S.R. (2010) Otolith geochemistry does not reflect dispersal history of clownfish larvae. Coral Reefs, 29 (4). pp. 883-891.

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Abstract

Natural geochemical signatures in calcified structures are commonly employed to retrospectively estimate dispersal pathways of larval fish and invertebrates. However, the accuracy of the approach is generally untested due to the absence of individuals with known dispersal histories. We used genetic parentage analysis (genotyping) to divide 110 new recruits of the orange clownfish, Amphiprion percula, from Kimbe Island, Papua New Guinea, into two groups: ‘‘self-recruiters’’ spawned by parents on Kimbe Island and ‘‘immigrants’’ that had dispersed from distant reefs ([10 km away). Analysis of daily increments in sagittal otoliths found no significant difference in PLDs or otolith growth rates between self-recruiting and immigrant larvae. We also quantified otolith Sr/Ca and Ba/Ca ratios during the larval phase using laser ablation inductively coupled plasma mass spectrometry. Again, we found no significant differences in larval profiles of either element between self-recruits and immigrants. Our results highlight the need for caution when interpreting otolith dispersal histories based on natural geochemical tags in the absence of water chemistry data or known-origin larvae with which to test the discriminatory ability of natural tags.

Item ID: 16941
Item Type: Article (Refereed Research - C1)
Keywords: Amphiprion percula; connectivity; natural markers; otolith chemistry; Papua New Guinea, pelagic larval duration
ISSN: 1432-0975
Date Deposited: 15 May 2011 04:43
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 50%
06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060308 Life Histories @ 20%
05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050202 Conservation and Biodiversity @ 30%
SEO Codes: 96 ENVIRONMENT > 9613 Remnant Vegetation and Protected Conservation Areas > 961303 Protected Conservation Areas in Marine Environments @ 40%
96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960507 Ecosystem Assessment and Management of Marine Environments @ 30%
96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960808 Marine Flora, Fauna and Biodiversity @ 30%
Citation Count from Web of Science Web of Science 2
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