scape (version 2.2-0)

x.ling: Ling Assessment

Description

Stock assessment data and model fit for ling (Genypterus blacodes) in New Zealand waters, using a Coleraine statistical catch-at-age model.

This is a two-sex model with 30 age classes and 29 length classes, the catch data starting in 1973 and ending in 2000. The model was fitted to five data components: longline abundance index, survey abundance index, survey catch at age, longline catch at length, and trawl catch at length.

Usage

x.ling

Format

List of class scape containing:

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

CPUE

commercial abundance index and fit

Survey

survey abundance index and fit

CAs

survey C@A (catch at age) and fit

CLc

commercial C@L (catch at length) and fit

Source

Annala, J. H., Sullivan, K. J., O'Brien, C. J., and Smith, N. W. M., eds. (2001) Report from the Fishery Assessment Plenary: Stock assessments and yield estimates. Wellington: NIWA. Available from NIWA library, Wellington. Magnusson, A. (2001) SeaFIC assessment of Chatham Rise ling (LIN 3 and 4). Middle Depths Working Group Doc. 11. Report for the New Zealand Ministry of Fisheries. Available at http://www.hafro.is/~arnima/pdf/2001-ling.pdf.

Details

Hilborn et al. (2003) give a general description of the Coleraine generalized model.

Estimated parameters: R0, Rinit, Sleft[trawl], Sfemale[t], Smale[t], Sright[t], Sleft[longline], Sfemale[l], Smale[l], Sright[l], Sleft[survey], Sfemale[s], Smale[s], Sright[s], q[l], q[s], and 29 recruitment deviates.

References

Hilborn, R., Maunder, M., Parma, A., Ernst, B., Payne, J., and Starr, P. (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/pdf/coleraine.pdf.

See Also

importCol was used to import the fitted model.

x.cod, x.ling, x.oreo, and x.sbw are fitted scape models to explore.

scape-package gives an overview of the package.

Examples

plotB(x.ling)
plotCA(x.ling, "s")
plotCL(x.ling, "c", series="1")
plotCL(x.ling, "c", series="2")
plotIndex(x.ling, "c")
plotIndex(x.ling, "s")
plotN(x.ling)
plotSel(x.ling)