Spawner Trend Browser

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Number of Populations

Major Population Group
Trend: End Year: Target Reference:  Wild Only
 No Jacks
Population Ordering:    Pop Bar Width
Trend: End Year: Target Reference:  Wild Only
 No Jacks
   Scale Maximum

The Delisting Abundance Threshold Low Recovery (DATLR) value presented to delisting are the Minimum Abundance values identified in recovery plans as likely to occur during the Federal Register Notices. In a special case For Mid Columbia Steelhead Populations recovery plans called out Minimum Abundance values using the TRT viability curves had a value of approximately 100 for the lowest abundance relative to the 100 Extinction risk curve, unless specified in the recovery plan as a different value.

NOAA Salmonid Population Summary (SPS) Database Some abundance estimates were taken from the NOAA Salmonid Population Summary (SPS) Database, obtained from the Northwest Fisheries Science Center (NWFSC) maintains the Salmon Population Summary (SPS) database, providing access to demographic data compiled for ESA-listed salmonid populations as part of the NWFSC's technical recovery planning efforts. The database contains data on spawning abundance, age structure of wild spawners, fraction of natural spawners that are of wild origin, and the reduction in spawning abundance due to harvest. The data correspond to the populations identified by the NMFS Technical Recovery Teams, and are used in part to assess population and ESU-level recovery criteria for many listed ESUs. Data may be downloaded at the NWFSC SPS Website.
Currently using Status Review 2015 downloaded 4/25/2016.

SPS Attribution and Disclaimer:
Due to the wide variety of data sources the go into the Salmonid Population Summary (SPS) database, the NOAA Northwest Fisheries Science Center (NWFSC) does not guarantee the accuracy of any of the data in the SPS database. In particular, neither the U.S. Government, nor any agency or employee thereof, makes any warranties, expressed or implied, with respect to the accuracy of the data, including but not limited to the implied warranties or merchantability and fitness for any particular purpose. In no event shall the U.S. Government, nor any agency or employee thereof, be liable for any direct, indirect, or consequential damage flowing from the use of the data in the SPS database.

Coordinated Assessments (CAX) Database Most recent abundance estimates were taken from the PNAMP Coordinated Assessments Database (CAX), obtained from the Streamnet website.
Currently using 1/22/2018 version downloaded 2/5/2018.

CAX Attribution and Disclaimer:
Data provided in the CAX DES is from the co-managers. CAX data submission do not guarantee that the information meets the VSP method requirements to be used by NOAA but is the best available science from the provider. Ongoing QA/QC may be necessary to ensure CA data has all co-manager buy in to be official data. The SPS data may be the system of record of data if the co-managers have not bought off on CA data. By 2018 it will be believed that the CAX with be the system of record for indicator data sets moving forward.

Co-manager Direct DES submission:
The following data was provided directly from the sponsor. In most cases the data format matches the DES format, however it was not submitted to the DES for regional publication. Official publication of the Data in the CAX is pending, however until available this is the only available source.

Other data sets:
These data sets are from co-manager reports. Citations are provided in comments. Because this data is not in the DES format it is unclear if the values presented equate to official indicator status. Report documentation may provide additional data on the status of methods and confidence of the data. These data will be considered preliminary, but the “best available science absent CAX or SPS data submissions.

a NOAA ESA Recovery and Delisting Disclaimer:
Based on TRT Rule set it is not necessary to achieve minimum abundance viability thresholds for every population.

The SPS Trend Browser is still in development and we welcome your feedback. Please send comments to:
Brian Maschhoff.

Support for development was provided by the Bonneville Power Administration.

Bonneville Power Administration Salmonetics Hinrichsen Environmental

Browser Requirements

  1. A reasonably recent browser (Chrome, IE, Firefox, Opera, Safari)
  2. At least 1280 horizontal pixels in browser window. Decrease magnification if necessary

How to Interpret

  • Mean spawner abundances for each population, relative to (i.e. divided by) the selected abundance target, for the most recent time span (e.g. 2009-2013) are shown via the horizontal black bar.
  • The change in abundance from one time span to the next is depicted with the inner arrows (green for increasing, red for decreasing) where the position of the arrow tail indicates the mean relative abundance for the earlier time span and the arrow head the later time span. This is shown in the figure below for a Bear Valley Creek Chinook trend. The upper chart displays the time series of abundance estimates. The 5-year geometric mean abundance for each of two sequential five year time span (2004-2008 and 2009-2013) are indicated with the gray horizontal lines.

    The black line denotes a running 5-year geometric mean, and thus the mean for a five year time span is equal to the value for the fifth year of the span. The mean abundance values and the abundance target are mapped to the trend chart as shown with the red arrows.
  • Displayed to the right of each trend are the actual spawner abundance and target values (the latter in parentheses).

Usage Hints

  • The populations are sorted alphabetically by ESU (DPS), then by Major Population Group (MPG), and finally by relative abundance. With the Reorder option checked, populations are reordered upon changing the Trend or Target options. To maintain the current order, uncheck.
  • The left and right arrows on the x-axis scale at bottom increase or decrease the plotted range (starting at zero).