Do Sicydium punctatum adults move in the caribbean estuaries ? New insight from strontium isotopes

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Producteur
Contributeur(s) MONTI D.,MARTIN J.,BERAIL S.,PECHEYRAN C.,KEITH P.,BAREILLE G.
Éditeur(s) Vie et milieu - Life and environment
Identifiant documentaire 29-1935
Identifiant OAI oai:base-documentaire.pole-tropical.org:1935
Auteur(s): TABOURLET H.
Mots clés MIGRATION ANIMALE STRONTIUM COURS D'EAU
Date de publication 01/01/2015
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Date de dépôt légal
Langue eng
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Guadeloupe

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Description
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:Ca otolith). In our study, varying as well as non-varying Ba:Ca otolith individuals exhibited unchanged 87Sr:86Sr otolith throughout the adult phase with values typical of stream water flowing through volcanic substrate (0.7053 ± 0.0003). These results unambiguously discard the Ba:Ca otolith 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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