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Helgoländer Meeresuntersuchungen

, Volume 40, Issue 3, pp 321–326 | Cite as

Flow-carried and active swimming migration of the glass eel(Anguilla anguilla) in the tidal area of a small estuary on the French Atlantic coast

  • Didier Gascuel
Article

Abstract

The study of the migration dynamics of glass eels(Anguilla anguilla) in a small estuary of the French Atlantic coast shows a two-stage sequence: (1) From November to March, the glass eels migrate upstream by using the tidal currents. The estuarine hydrology leads to a natural trapping of migrants in a typical area where the current speed slows down. The location of this zone depends on hydraulic conditions. The greater the tide is the farther upstream this area will be. This phenomenon leads to an increasing catchability of elvers. (2) From April onwards, when the water temperature reaches 10–12 °C, the glass eels swim actively upstream in the estuary. Then, fish concentrate just below the first dam. This behaviour shift shows the beginning of the colonization process of the whole riverine system.

Keywords

Migration Waste Water Tidal Current Current Speed Colonization Process 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Literature cited

  1. Bertignac, M., 1984. Etude d'une passe à civelles et des manoeuvres d'ouvrages à la mer. Rapport contrat Parc Naturel Régional du Marais Poitevin. Laboratoire de Biologie Halieutique de l'ENSA de Rennes, 80 pp.Google Scholar
  2. Cantrelle, I., 1981. Etude de la migration et de la pêche des civelles (Anguilla anguilla L.) dans l'estuaire de la Gironde. Thèse, Univ. Paris, 237 pp.Google Scholar
  3. Creutzberg, F., 1958. Use of tidal streams by migrating elvers (Anguilla vulgaris Turt.). — Nature, Lond.22, 857–858.Google Scholar
  4. Deelder, C. L., 1958. On the behaviour of elvers (Anguilla vulgaris Turt.) migrating from the sea into freshwater. — J. Cons. perm. int. Explor. Mer24, 135–146.Google Scholar
  5. Elie, P., 1979. Contribution à l'étude des montées de civelles d'Anguilla anguilla L. dans l'estuaire de la Loire: Pêche, écologie, écophysiologie et élevage. Thèse, Univ. Rennes, 381 pp.Google Scholar
  6. Gascuel, D., 1986. La civelle d'anguille dans l'estuaire de la Sèvre Niortaise: biologie, écologie, exploitation. Rapport contrat Parc Naturel Régional du Marais Poitevin. Laboratoire de Biologie Halieutique de l'ENSA de Rennes, 220 pp.Google Scholar
  7. McCleave, J. D. & Kleckner, R. C., 1982. Selective tidal stream transport in the estuarine migration of glass eels of American eel(Anguilla rostrata). — J. Cons. perm. int. Explor. Mer40, 262–271.Google Scholar
  8. Tesch, F. W., 1977. The eel. Chapman & Hall, London, 434 pp.Google Scholar

Copyright information

© Biologische Anstalt Helgoland 1986

Authors and Affiliations

  • Didier Gascuel
    • 1
  1. 1.Laboratoire de Biologie Halieutique de l'ENSAR — ERA/IFREMERRennes CedexFrance

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