Ichthyological collections and current fish management plans used as tools for the study of alterations of fish populations in Lombardy. New local fish management plans and unpublished observations provide new data regarding changes in fish populations in Lombardy of the last decade. The endemic goby Knipowitschia punctatissima was found in the area of the province of Mantova, Cremona and Lodi. Aspius aspius and Misgurnus anguillicaudatus are two recently introduced non-native species that invaded all southern provinces of the region. The Museum of Natural History of Pavia preserves specimens of Lepomis gibbosus, Micropterus salmoides and Sander lucioperca collected in Lombardy in the early twentieth century; these specimens could be used to obtain accurate information about the introductions of alien species that occurred in that age.
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