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Length-weight relationship and seasonal effects of the Summer Monsoon on condition factor of Terapon jarbua (Forsskål, 1775) from the wider Gulf of Aden including Socotra Island

Authors

  • E. Lavergne,

    1. Senckenberg Forschungsinstitut und Naturmuseum, Sektion Ichthyologie, Frankfurt am Main, Germany
    2. Biodiversität und Klima Forschungszentrum (BiK-F), Frankfurt am Main, Germany
    3. Université de Bretagne Occidentale, UMR 6539, CNRS/IRD/UBO, Laboratoire des Sciences de l’Environnement Marin LEMAR, Institut Universitaire Européen de la Mer, Plouzané, France
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  • U. Zajonz,

    1. Senckenberg Forschungsinstitut und Naturmuseum, Sektion Ichthyologie, Frankfurt am Main, Germany
    2. Biodiversität und Klima Forschungszentrum (BiK-F), Frankfurt am Main, Germany
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  • L. Sellin

    1. Université de Bretagne Occidentale, UMR 6539, CNRS/IRD/UBO, Laboratoire des Sciences de l’Environnement Marin LEMAR, Institut Universitaire Européen de la Mer, Plouzané, France
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Author’s address: Edouard Lavergne, LEMAR, Rue Dumont d’Urville,
F-29280 Plouzané, France.
E-mail: edouard.lavergne@gmail.com

Summary

The present study investigates the length-weight relationship and condition factor of populations of the Indo-Pacific fish Terapon jarbua (Forsskål, 1775) collected in the wider Gulf of Aden, notably from Socotra Island and the Hadramout coast of Yemen. This region displays a monsoon climate, with wide seasonal variations affecting estuarine habitats. A total of 620 specimens collected in estuaries and at sea were measured and weighed during field surveys carried out in 2007 and 2008 during pre- and post- South-Western monsoon periods. The length-weight relationship of the studied populations of Terapon jarbua was determined as W = 0.0288 × SL2.99, with r2 = 0.96 and consistent with existing data on the species from other regions. Significant seasonal differences were found in Fulton’s condition factor of Terapon jarbua.

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