Spatial variation of otolith elemental signatures among juvenile gray snapper (Lutjanus griseus) inhabiting southern Florida waters

Autor: Monica R. Lara, David L. Jones, Zhongxing Chen, Cynthia M. Jones, John T. Lamkin
Rok vydání: 2007
Předmět:
Zdroj: Marine Biology. 153:235-248
ISSN: 1432-1793
0025-3162
DOI: 10.1007/s00227-007-0799-5
Popis: Juvenile gray snapper, Lutjanus griseus, are believed to use bays and estuaries in southern Florida as nurseries before moving out to the adjoining reef tract as adults. Using high-resolution sector Weld-inductively cou- pled plasma-mass spectrometry (SF-ICP-MS), the elemen- tal chemistry of the otoliths of juveniles from Wve nursery regions was resolved by establishing elemental "signa- tures" for each region. In this study we simultaneously ana- lyzed 32 elements including a suite of rare earth elements. A stepwise variable selection procedure retained a subset of eight elements that contributed substantially to separating otolith samples, including two rare earth elements; this is one of the Wrst studies in which rare earth elements in oto- liths have contributed to separation of Wsh stocks. The clas- siWcation success rate in assigning Wshes to the correct region of origin was 82%. Resolution of sites less than 10 km apart suggested high site Wdelity in juvenile gray snapper and little mixing of water masses between sites. The juvenile nursery signatures will be used to determine the relative contribution of diVerent nurseries to the adult population on an adjoining reef tract.
Databáze: OpenAIRE
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