scape (version 1.0-8)

x.cod: Cod Assessment

Description

Stock assessment data and model fit for cod (Gadus morhua) in Icelandic waters, using a Coleraine statistical catch-at-age model. This is a single-sex model with 10 age classes, the catch data starting in 1971 and ending in 2003. The model was fitted to three data components: survey abundance index, commercial catch at age, and survey catch at age.

Usage

x.cod

format

List of class scape containing: ll{ N predicted numbers at age B predicted biomass, recruitment, and observed landings (year things) Sel predicted selectivity and observed maturity (age things) Dev predicted recruitment deviates from the stock-recruitment curve Survey survey abundance index and fit CAc commercial C@A (catch at age) and fit CAs survey C@A and fit }

source

Marine Research Institute. 2003. State of marine stocks in Icelandic waters 2002/2003. Available at http://www.hafro.is/Astand/2003/astand-allt-03.pdf.

Details

A maturity vector of zeros and ones was used to predict the biomass of age 4 and older, the quantity of main interest for the management of this stock. Estimated parameters: R0, Rinit, uinit, Sleft[commercial], Sfull[c], Sleft[survey], Sfull[s], q, and 41 recruitment deviates.

References

Hilborn, R., M. Maunder, A. Parma, B. Ernst, J. Payne, and P. Starr. 2003. Coleraine: A generalized age-structured stock assessment model. User's manual version 2.0. University of Washington Report SAFS-UW-0116. Available at http://fish.washington.edu/research/coleraine/coleraine.pdf. Magnusson, A. 2003. Coleraine assessment of the Icelandic cod stock. Report for the Icelandic Marine Research Institute. Available from the author.

See Also

importCol, x.ling, x.oreo, x.sbw. scape-package gives an overview of the package.

Examples

plotB(x.cod)
plotCA(x.cod, "c")
plotCA(x.cod, "s")
plotIndex(x.cod, "s")
plotN(x.cod)
plotSel(x.cod)