Definition: Capable of the biological process in which new individuals are produced by either a single cell or a group of cells, in the absence of any sexual process.
Definition: Estonian Academy of Sciences, Vörtsjärv Limnological Station, Estonia. URL for main institutional website: http://www.akadeemia.ee/et/akadeemia/kontakt/
Definition: Zoological Institute, Russian Academy of Sciences (ZISP). St. Petersburg, Russia. URL for main institutional website: http://www.zin.ru/index_e.htm