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Do sicydium punctatum adults move in the Caribbean estuaires? New insight from strontium isotopes

Abstract : Strontium isotopic variations (87Sr:86Sr) were investigated in otoliths of an amphidromous goby, Sicydium punctatum, coming from a tropical insular river and showing contrasted depositional patterns of barium:calcium in otolith (Ba:Caotolith). In our study, varying as well as non-varying Ba:Caotolith individuals exhibited unchanged 87Sr:86Srotolith throughout the adult phase with values typical of stream water flowing through volcanic substrate (0.7053 ± 0.0003). These results unambiguously discard the Ba:Caotolith peaks as markers of migrations between freshwater and brackish estuarine water during the adult phase of the species and open on investigations of sources of variations on microhabitats or unknown physiological effects.
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https://hal.inrae.fr/hal-02601708
Contributor : Migration Irstea Publications <>
Submitted on : Saturday, May 16, 2020 - 6:56:44 AM
Last modification on : Thursday, March 25, 2021 - 2:56:03 PM

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  • HAL Id : hal-02601708, version 1
  • IRSTEA : PUB00044940

Citation

H. Tabouret, D. Monti, J. Martin, S. Berail, C. Pecheyran, et al.. Do sicydium punctatum adults move in the Caribbean estuaires? New insight from strontium isotopes. Vie et Milieu / Life & Environment, Observatoire Océanologique - Laboratoire Arago, 2015, 65 (2), pp.85-89. ⟨hal-02601708⟩

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