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before then, there were abundant shellfish, crustaceans, chironomidae and oligochaeta, as well as zooplankton (concentration 1.87 g/l in 1985), especially in the western part.
antes de eso, se observaron abundantes mariscos, crustáceos, chironomidae y oligoquetos, así como zooplancton (concentración de 1,87 g/l en 1985), sobre todo en la parte occidental.