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Upper Midwest Environmental Sciences Center
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


*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.

Graphical Fish Database Browser Home | About the LTRMP Fish Component | Help Page
Catch Per Unit of Effort | Proportional Stock Density | Frequency of Occurrence
Species List | Community Composition | Species Richness | Sampling Allocations
Total Catches | LTRMP Hydrographs

Photographs taken by David Ostendorf

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Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://umesc.usgs.gov/data_library/fisheries/graphical/psds.shtml
Page Contact Information: Contacting the Upper Midwest Environmental Sciences Center
Page Last Modified: August 21, 2009