evolutionarily significant unit(redirected from Evolutionary Significant Units)
evolutionarily significant unit[‚ev·ə‚lü·shə¦ner·ə·lē sig¦nif·i·kənt ′yü·nət]
A distinct local population within a species that has very different behavioral and phenological traits and thus harbors enough genetic uniqueness to warrant its own management and conservation agenda. Abbreviated ESU.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.