File:Margaritifera margaritifera, Aquarium Finisterrae, Galiza.jpg

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Nombre Científico: Margaritifera margaritifera Nombre vulgar: Mejillón de río autóctono o perla de agua dulce Ejemplar de la exposición "Fabricantes de perlas" del Aquarium Finisterrae: <a href="http://www.casaciencias.org/aquarium/fabricantes-de-perlas.html">www.casaciencias.org/aquarium/fabricantes-de-perlas.html</a>

Biología: Son bivalvos de hasta 20 cm y 100 años de vida. Su mecanismo de reproducción implica una fase parásita de las branquias de peces como el salmón o la trucha. Es la fase de gloquidio. Precisamente este sofisticado sistema de reproducción junto con la creciente contaminación de los ríos es el que hace que este en serio peligro de extinción ya que este sistema reproductivo está seriamente compromentido. Su forma de alimentarse es por filtración a través de su complejo braquial. Alimentación: En su dieta constan todo tipo de microorganismos planctónicos de agua dulce, especialmente de microalgas. No son selectivos. Distribución: Habitan en algunos lechos fluviales no contaminados españoles, especialmente en correntías no muy fuertes de las zonas más altas de los ríos. En Galicia se encuentran en rios como el Miño en su parte alta y afluentes, asi como en el Tambre el Mandeo o el Ulla.

>> <a href="http://maps.google.com/maps/ms?ie=UTF8&hl=es&msa=0&msid=110893356096158038672.000001130534e7fcc76b8&ll=24.846565,73.828125&spn=131.163282,239.414063&z=2&om=1">Ver mapamundi</a> de los Fabricantes de perlas.
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Source originally posted to Flickr as Margaritifera margaritifera
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This image, which was originally posted to Flickr, was uploaded to Commons using Flickr upload bot on 27 December 2009, 23:06 by Lmbuga. On that date, it was confirmed to be licensed under the terms of the license indicated.
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