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    • Otolith output - Project to study alternative life history types of fall Chinook based on otoliths

    Metadata Updated: May 24, 2025

    This project describes ongoing work by scientists in FE Ecosystem Analysis and EFS Environmental Chemistry programs to identify natal and rearing locations, reconstruct life history strategy, and evaluate juvenile performance of adult Snake River fall Chinook salmon. Due to dramatic declines in its abundance, Snake River fall Chinook salmon was listed as threatened under the Endangered Species Act. Management of Snake River fall Chinook salmon has been hindered by a great deal of uncertainty regarding key aspects of the population. In particular, the existence of an overwintering behavior in a portion of the population has complicated estimates of survival through the hydropower system. Further, differential detectability of redds has limited the ability to accurately develop run reconstructions. Effective management of Snake River fall Chinook salmon will require an understanding of the details of their early life-history, including where juveniles hatch and rear, the proportion of juveniles that exhibit the yearling strategy, when they initiate downstream migration, and estuarine residence time. In this project we investigate early life history movement and performance of Snake River fall Chinook salmon by using microchemistry and microstructure of otoliths sampled from juveniles and adults. Results from this study are intended to help inform recovery planning including future habitat restoration and conservation efforts in the Snake River Basin and Columbia River. Images, increment measurements, and microchemistry trajectories.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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    Dates

    Metadata Date May 15, 2025
    Metadata Created Date October 19, 2024
    Metadata Updated Date May 24, 2025
    Reference Date(s) January 1, 2010 (creation), July 20, 2016 (publication)
    Frequency Of Update

    Metadata Source

    Harvested from NMFS NWFSC

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date May 15, 2025
    Metadata Created Date October 19, 2024
    Metadata Updated Date May 24, 2025
    Reference Date(s) January 1, 2010 (creation), July 20, 2016 (publication)
    Responsible Party (Point of Contact, Custodian)
    Contact Email
    Guid gov.noaa.nmfs.inport:18138
    Access Constraints Cite As: Northwest Fisheries Science Center, [Date of Access]: Otolith output - Project to study alternative life history types of fall Chinook based on otoliths [Data Date Range], https://www.fisheries.noaa.gov/inport/item/18138., Access Constraints: NA
    Bbox East Long -118.2183
    Bbox North Lat 46.6063
    Bbox South Lat 46.5963
    Bbox West Long -118.2283
    Coupled Resource
    Frequency Of Update
    Harvest Object Id a02ca389-2768-4e55-afe6-5378eb43429b
    Harvest Source Id ba43549f-8268-499d-bec8-91b164cb168f
    Harvest Source Title NMFS NWFSC
    Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
    Lineage Excel macro
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-118.2283, 46.5963], [-118.2183, 46.5963], [-118.2183, 46.6063], [-118.2283, 46.6063], [-118.2283, 46.5963]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2010-10-01

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