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folder.gif Long Term Resource Monitoring Program
Fisheries Data - Graphical Fish Database Browser
About the LTRMP Fish ComponentHelp using Fish Database Browser


Query for Proportional Stock Density

Choose Gear:

Choose Species:

Year Range:   to

*Note for more information on specific gears, click on link.

Proportional Stock Density (PSD) is a measure of species size structure. The metric is a ratio (expressed as percentage) between the number of quality-sized individuals or larger individuals and stock-sized individuals. Stock and quality size designations vary by species. PSDs are presented for 14 commercially and recreationally exploited species and are portrayed as time series.

About the LTRMP Fish Component | Help Page | Catch Per Unit of Effort | Proportional Stock Density
Frequency of Occurrence | Species List | Community Composition | Species Richness

Photographs taken by David Ostendorf

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URL: http://www.umesc.usgs.gov/data_library/fisheries/graphical/psds.shtml
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Page Last Modified: October 2, 2007