ASPIC Software

for fishery surplus-production modeling

Last update: November 20, 2011

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ASPIC news

As of November 20, 2011, ASPIC version 5.47 is available. This should provide an increase in speed for most users. In addition, a new Quick Start Guide replaces the Quick Reference. The Quick Start Guide is intended to make it easier for new users to get started with ASPIC.

ASPIC synopsis

ASPIC is a computer program for fisheries stock assessment work. Building on earlier work by Graham, Schaefer, Pella, Tomlinson, Fletcher, and others, ASPIC program implements methods described in Prager (1994) and Prager et al. (1996) to fit a nonequilibrium surplus-production model to data on fish catch and relative abundance.

Features of ASPIC include:

Fits logistic (Schaefer) and generalized (Pella–Tomlinson) surplus-production models
Observation-error estimator assuming lognormal errors
No assumption that observed yields are equilibrium yields
Up to 10 simultaneous or sequential data series
Bootstrap confidence intervals on estimates
Requires time series of removals and either standardized fishing effort or relative abundance

ASPIC and related programs are available free of charge, but with no warranty of any kind. Because of licensing restrictions on some subroutines, only compiled versions for Windows are available here. If you require source code (e.g., to run ASPIC on a different operating system), please contact the author.

ASPIC downloads

Current Version. Download ASPIC here as a Windows installer. To install, just run the installer. The installation will include these items:

ASPIC itself (command-line and drag-and-drop versions)
ASPICP, a projection program for ASPIC (command-line and drag-and-drop versions)
AGRAPH, a graphics program for ASPIC
Several sets of sample input and output files
ASPIC User's Guide and onscreen Quick-Reference (PDF)

Please note: Reported bugs are fixed promptly. For best results, please use the current version of ASPIC.

Related files and programs

ASPIC User's Guide	When you download ASPIC, a copy of the user’s guide is included. It also can be downloaded alone.
PrintFile	Some ASPIC users find this freeware utility handy for printing ASPIC output files, which are 120 characters wide. PrintFile was written by Peter Lerup of Malmo, Sweden.
ConTEXT	For editing ASPIC input files, an editor that can mark and move rectangular blocks is useful. ConTEXT, a freeware programmer's editor, offers that ability. ConTEXT was written by Eden Kirin of Zagreb, Croatia.