Do Sicydium punctatum adults move in the Caribbean estuaries? 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 bariumxalcium 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.archives-ouvertes.fr/hal-01557306
Contributor : Hélène Tabouret <>
Submitted on : Thursday, July 6, 2017 - 9:44:16 AM
Last modification on : Tuesday, May 14, 2019 - 10:06:01 AM

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  • HAL Id : hal-01557306, version 1

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Hélène Tabouret, D. Monti, J. Martin, Sylvain Bérail, Christophe Pécheyran, et al.. Do Sicydium punctatum adults move in the Caribbean estuaries? New insight from Strontium isotopes. Vie et Milieu, Laboratoire Arago, 2015, 65 (2), pp.85-89. ⟨hal-01557306⟩

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