scape (version 1.0-9)

x.oreo: Oreo Assessment

Description

Stock assessment data and model fit for smooth oreo (Pseudocyttus maculatus) in New Zealand waters, using a Coleraine statistical catch-at-age model. This is a two-sex model with 80 age classes and 44 length classes, the catch data starting in 1979 and ending in 2001. The model was fitted to seven data components: pre-GPS commercial abundance index, post-GPS commercial abundance index, survey abundance index, commercial catch at length, survey catch at length, female length at age, and male length at age.

Usage

x.oreo

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) CPUE commercial abundance index and fit Survey survey abundance index and fit CLc commercial C@L (catch at length) and fit CLs survey C@L and fit LA observed L@A (length at age) }

source

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.

Details

Since relatively few smooth oreo individuals have been aged, this assessment admits uncertainty about the von Bertalanffy growth curve, which is estimated for each sex. The acoustic survey abundance estimate is considered absolute, so q[survey] is fixed at 1. Estimated parameters: R0, Sfull[commercial], Sfull[survey], q[pre-GPS], q[post-GPS], L80female, L80male, Kfemale, Kmale, CVfemale, and CVmale.

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. Stock assessment of Chatham Rise smooth oreo (SSO4). Deepwater Working Group Doc. 16. Report for the New Zealand Ministry of Fisheries. Available from the author.

See Also

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

Examples

plotB(x.oreo)
plotCL(x.oreo, "c")
plotCL(x.oreo, "s")
plotIndex(x.oreo, "c")
plotIndex(x.oreo, "s")
plotLA(x.oreo)
plotN(x.oreo)
plotSel(x.oreo)