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The discrimination of roach Rutilus rutilus (Linnaeus, 1758) populations in different parts of a river system. An investigation using biochemical markers

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Abstract

Roach populations from different parts of the network of the French Upper Rhone and from Lake Geneva were examined. Several populations were discriminated by the electrophoresis of 16 enzymes coded for by 28 gene loci.

90% of the overall genetic variation was due to intrapopulation variation. Some affinity was found between the populations of Lake Geneva and the Rhone immediately downstream, but the stocks of the Rhone farther down proved to be clearly distinct from these (genetic distance D = 0.048) and probably included several independently reproducing populations. One of these populations was only found in the channel, others inhabited a side arm (D between them = 0.035) or succeeded each other in it, presumably in connection with spawning migrations.

Résumé

Plusieurs organes de gardons provenant du Lac Léman et de diverses parties du réseau fluvial du Rhône ont été traités par électrophorèse. Seize systèmes enzymatiques ont été analysés, codés par 28 loci.

La variabilité génétique du gardon est dominée a 90% par la variabilité intrapopulation. Cependant, l'examen du dendrogramme des afiinités génétiques fait apparaître un premier groupe populationnel dans le Léman et une partie du Rhône en aval, séparé des autres par une distance (D = 0,048). Le reste est un groupe hétérogène, comprenant plusieurs populations dont il est probable qu'elles se reproduisent indépendamment les unes des autres, certaines typiques du chenal, d'autres d'un bras mort (D = 0,035 entre elles), d'autres enfin dont on peut penser qu'elles se succèdent dans le bras mort a l'époque de la reproduction.

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Authors and Affiliations

  1. Laboratoire de Biologie Animale et Ecologie, Université Claude Bernard Lyon-I, 43 boulevard du 11 novembre, F-69622, Villeurbanne Cedex, France (U.R.A. CNRS 367 Ecologie des Eaux Douces)

    Yvette Bouvet, Kadarwan Soewardi & Eric Pattee

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  1. Yvette Bouvet
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  2. Kadarwan Soewardi
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  3. Eric Pattee
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Bouvet, Y., Soewardi, K. & Pattee, E. The discrimination of roach Rutilus rutilus (Linnaeus, 1758) populations in different parts of a river system. An investigation using biochemical markers. Hydrobiologia 209, 161–167 (1991). https://doi.org/10.1007/BF00006928

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  • DOI: https://doi.org/10.1007/BF00006928

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