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Information in Support of a Five-Year Status Review of Eulachon (Thaleichthys pacificus) Listed under the Endangered Species Act: Southern Distinct Population Segment
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2022
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[PDF-7.85 MB]
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Description:This current report provides an updated synthesis of information that has become available since the 2016 review, focusing on: 1) new information relevant to the Southern DPS’s boundaries; 2) trends and status in abundance, productivity, spatial structure, and diversity; and 3) newly available information on selected threats to the Southern DPS. The information in this report will be incorporated into WCR’s review, and WCR will make final determinations about any proposed changes in listing status, taking into account not only biological information but also ongoing or planned protective efforts. Newly available data pertinent to the Southern DPS’s spatial delineation are: 1) studies by Benson et al. (2019) that attempted to distinguish between eulachon populations based on differences in otolith microchemistry, 2) studies by Spangler (2020) that showed that some eulachon may be spawning in estuarine habitats and at higher salinities than previously believed, and 3) the genetic population structure studies of Sutherland et al. (2021).
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Rights Information:Public Domain
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Compliance:Submitted
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