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ADW: Oncorhynchus mykiss: INFORMATION - Actinopterygii

Evolution is change in the heritable characteristics of biological populations over successive generations. These characteristics are the expressions of genes that are passed on from parent to offspring during reproduction. Different characteristics tend to exist within any given population as a result of mutation, genetic recombination and other sources of genetic variation. Evolution occurs when evolutionary processes such as natural selection and genetic drift act on this variation, resulting Evolutionarily Significant Units, Distinct Population Segments, and the Endangered Species Act: Reply to Pennock and Dimmick. ROBIN S. WAPLES. Conservation Biology Division, National Marine Fisheries Service, Northwest Fisheries Science Center, 2725 Montlake Boulevard East, Seattle, WA 98112, U.S.A., email robin.waples@noaa.gov.

Show more Evolutionarily Significant Units (ESU) are defined by NOAA Fisheries under their Endangered Species Act (ESA) status reviews. They are defined as a population that is substantially reproductively isolated from cospecific populations and represents an important component in the evolutionary legacy of the species. Evolutionarily Significant Units of Rare Pygmy Sunfishes (Genus Elassoma) J. M. QUATTRO, W. J. JONES, AND F. C. ROHDE Mitochondrial and nuclear gene variation is described from populations repre-senting the range of two species of rare pygmy sunfishes, Elassoma boehlkei and Elassoma okatie, in the Carolinas. Evolution is change in the heritable characteristics of biological populations over successive generations. These characteristics are the expressions of genes that are passed on from parent to offspring during reproduction. Different characteristics tend to exist within any given population as a result of mutation, genetic recombination and other sources of genetic variation. Evolution occurs when evolutionary processes such as natural selection and genetic drift act on this variation, resulting Evolutionarily Significant Units, Distinct Population Segments, and the Endangered Species Act: Reply to Pennock and Dimmick.

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Thus, the term `significant' in ESU should be seen as a recognition that the set of populations has been historically isolated and, accordingly, is likely to have a distinct potential. What Really is an Evolutionarily Significant Unit? The debate over integrating genetics and ecology in conservation biology The definition of Evolutionarily Significant Unit (ESU) that has been adopted by NMFS provides the specific criteria of reproductive isolation and evolutionary significance for describing ESU boundaries (Waples 1991, 56 FR 58612).

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Whether or not trout and steelhead populations, which are the two adult life histories of O. mykiss, are in the same Evolutionarily Significant Unit (ESU) - SOTSP. An evolutionarily significant unit, or ESU, of Pacific salmon is considered to be a "distinct population segment" and thus a "species" under the Endangered Species Act. Chinook salmon, Chum salmon, Coho salmon, Pink salmon, Sockeye salmon, and steelhead are all included in the dataset. individual population viability to the viability of the Evolutionarily Significant Unit (ESU) as whole. The document is based primarily on a review and synthesis of the conservation biology and salmonid literature.

69 Fed. Reg. at 31355. Part One sets the theme of the book by focusing on the Evolutionarily Significant Unit (ESU), a concept introduced by the National Marine Fisheries Service (NMFS) in 1991 for identification of distinct population segments in Pacific salmon.
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Diversity is Diverse and Complex! [Evolutionary Significant & Management Units]. If not, then 31 Mar 2017 Ryder (1986) proposed the concept of evolutionarily significant units (ESUs) to prioritize units for conservation efforts, independently of their 26 Oct 2006 The Evolutionarily Significant Unit (ESU) was conceptualized in 1986 as a conservation unit below the species level, theoretically applicable to Evolutionarily significant units in natural enemies: Identifying regional populations of Aphidius transcaspicus (Hymenoptera: Braconidae) for use in biological Evolutionarily Significant Units (ESU) are defined by NOAA Fisheries under their Endangered Species Act (ESA) status reviews.

ROBIN S. WAPLES.
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Final recovery plan for the Southern Oregon/Northern California Coast evolutionarily significant unit of coho salmon (Oncorhynchus kisutch) / Published: (2014) Final ESA recovery plan for Oregon Coast coho salmon (Oncorhynchus kisutch) / Published: (2016)