x.sbw {scape} | R Documentation |
Stock assessment data and model fit for southern blue whiting (Micromesistius australis) in New Zealand waters, using a Coleraine statistical catch-at-age model.
This is a single-sex model with 11 age classes, the catch data starting in 1979 and ending in 2002. The model was fitted to two data components: survey abundance index and commercial catch at age.
x.sbw
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 |
Survey | survey abundance index and fit |
CAc | commercial C@A (catch at age) and fit |
The survey abundance index was preprocessed so that it contains only age 4 and older.
Estimated parameters: R0, Rinit, Rplus, Sleft[commercial], Sfull[c], q, and 33 recruitment deviates.
The list was imported from the file ‘scape/example/sbw.res’ using
importCol
.
The functions ll
(package gdata) and head
are
recommended for browsing model results, e.g. ll(x.sbw);
ll(x.sbw$N); head(x.sbw$N)
.
Annala, J.H., K.J. Sullivan, C.J. O'Brien, N.W.M. Smith, and S.M. Grayling (eds.) 2003. Report from the Fishery Assessment Plenary: Stock assessments and yield estimates. Wellington: Ministry of Fisheries. Available from NIWA library, Wellington.
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. and R. Hilborn. 2004. What is it in fisheries data that tells us about population abundance? Poster presented at the 4th World Fisheries Congress, Vancouver, BC. Available from the author.
importCol
, x.cod
, x.ling
,
x.oreo
.
scape-package
gives an overview of the package.
plotB(x.sbw) plotCA(x.sbw, "c") plotIndex(x.sbw, "s") plotN(x.sbw) plotSel(x.sbw)