Depletion Corrected Average Catch
Version 2.1.1 (October 2012)
The Depletion-Corrected Average Catch is a method for estimating sustainable yields for data-poor fisheries. Based on the idea that the average catch has been sustainable if abundance has not changed, DCAC makes a correction to that average if abundance has increased or decreased (which may be the subject of an educated guess based on subjective impressions). The magnitude of the correction depends on the approximate natural mortality rate, which should be about 0.2 or smaller to apply this model. Uncertainty is recognized in all of the parameters in the model, and is reflected in the output probability distribution.
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Alverson, D., and W.
Pereyra. 1969. Demersal fish explorations in the northeastern Pacific
Ocean – an evaluation of exploratory fishing methods and
analytical approaches to stock size and yield forecasts. J. Fish Res.
Board Can. 26:1985-2001.
Deriso, R. 1982. Relationship of fishing mortality to natural mortality and growth at the level of maximum sustainable yield. Can. J. Fish. Aquat. Sci. 39:1054-1-58.
Gulland, J. 1970. Preface. In: J. Gulland (ed.) The fish resources of the oceans. FAO Fish. Tech. Pap. 97, p.1-4.
He, X., D, Pearson, E. Dick, J. Field, S. Ralston, and A. MacCall. 2007. Status of the widow rockfish resource in 2007, an update. Pacific Fishery Management Council, Portland OR.
MacCall, A. 2007. Depletion-adjusted average catch. pp. 27-31 In: Rosenberg, A., Agnew, D., Babcock, E., Mogensen, C., O’Boyle, R., Powers, J., Stefansson, G., Swasey, J. 2007. Setting annual catch limits for U.S. fisheries: An expert working group report. Lenfest Ocean Program, 1025 F Street NW, Suite 900, Washington, D.C.
and S. Martell. 2004. Fisheries ecology and management. Princeton
University Press. 399 p.
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DCAC Version 2.1 (February 2011)
Adds alternative probability distributions of input parameters
Recognizes imprecision in catches and in the relative stock size at peak productivity
A file including individual parameter draws as well as resulting DCAC values is now available for diagnostic purposes.
DCAC Version 1.2 (January 2009)
Technical correction to GUI to support folders with spaces in name.
DCAC Version 1.1 (January 2009)
First general availability release
Improved support for Windows Vista
DCAC Versions 220.127.116.11 through 18.104.22.168 were Beta version with various technical improvements.
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Older Version Changes
website last modified May 16, 2016