evolutionarily significant unit

(redirected from Evolutionary Significant Units)

evolutionarily significant unit

[‚ev·ə‚lü·shə¦ner·ə·lē sig¦nif·i·kənt ′yü·nət]
(ecology)
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.
References in periodicals archive ?
Such populations are called 'evolutionary significant units' (ESU) (Ryder, 1986).
Comprehensive sampling at the adequate level (ideally comprising the entire distribution of the focal species), involving different habitats and coupled to morphological studies for detecting adaptive characteristics represent the more adequate condition for the identification of actual evolutionary significant units. In turn, this information is critical to guide management and conservation policies.
Steelhead (Oncorhynchus mykiss) Based on findings by the National Marine Fisheries Service, the FWS published a notice in the June 17 Federal Register formally listing several Evolutionary Significant Units (ESU) of this trout species for ESA protection.
Evolutionary significant units and the conservation of biological diversity under the Endangered Species Act.
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