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Upper Midwest Environmental Sciences Center
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Fisheries Data - Graphical Fish Database Browser
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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.

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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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URL: http://www.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