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2010
It is built from checkable properties of the record itself: whether the article has a DOI, how many independent sources confirmed its data, whether the required fields are filled in, and how recent the latest confirmation is. Disagreement between sources and a missing identifier lower it. A value of 80 or above means the record was published without further checking; 60 to 79 means it is published at reduced confidence, with a manual check advisable. A record verified by an editor by hand is never pushed below 90 by a recalculation. This scores our data about the article, not the article itself.
In 1998–2009, studies of ichthyofauna were conducted at 36 stations in the Balkhash basin. At present, the ichthyofauna of small waterbodies in the basin is represented by 11 indigenous and 16 alien fish species. Higher species diversity of alien species was registered in waterbodies subjected to strong anthropogenic impact.