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Showing items 1 through 9 of 3.
  1. Library Resource
    Journal Articles & Books
    December, 2001
    Indonesia, India, Madagascar, Colombia

    Las presentes directrices han sido elaboradas para asistir a los políticos, planificadores, técnicos y otros agentes implicados, en la decisión de adoptar una política de TGR, y en el caso de que se adopte, en la formulación de un programa efectivo. Un programa de estas características es el que tiene como resultado un proceso de transferencia de las funciones de la agencia de riego a las Asociaciones de Usuarios apropiado, satisfactorio y sostenible, que fomente un desarrollo equitativo en las áreas rurales.

  2. Library Resource
    Journal Articles & Books
    December, 2001
    United States of America, Sweden, Germany, Denmark, Italy, Australia, United Kingdom, Netherlands, Finland, Norway, Poland

    The main goal of biomanipulation by fish reduction is not a change in the fish community but a change in the aquatic ecosystem. Fish reduction is a method to push the system in another state, usually a shift from algae domination to macrophyte domination. Intensive fish removal is done by one of the following methods: seining (the Netherlands, Germany, UK), trawling (Sweden, Finland), use of rotenone (Norway, USA, Poland) and stocking of piscivorous fish (USA, Germany). If circumstances allow it (reservoir, ponds) draining is combined with seining (the Netherlands, UK, Poland).

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