Known-Biomass Production Model (KBPM) R package knobi version 1.0.0 Application of a Known Biomass Production Model (KBPM): (1) the fitting of KBPM to each stock; (2) the estimation of the effects of environmental variability; (3) the retrospective analysis to identify regime shifts; (4) the estimation of forecasts. For more details see Schaefer (1954) <https://www.iattc.org/GetAttachment/62d510ee-13d0-40f2-847b-0fde415476b8/Vol-1-No-2-1954-SCHAEFER,-MILNER-B-_Some-aspects-of-the-dynamics-of-populations-important-to-the-management-of-the-commercial-marine-fisheries.pdf>, Pella and Tomlinson (1969) <https://www.iattc.org/GetAttachment/9865079c-6ee7-40e2-9e30-c4523ff81ddf/Vol-13-No-3-1969-PELLA,-JEROME-J-,-and-PATRICK-K-TOMLINSON_A-generalized-stock-production-model.pdf> and MacCall (2002) <doi:10.1577/1548-8675(2002)022%3C0272:UOKBPM%3E2.0.CO;2>. Software Depends: R (>= 3.5.0) Imports: corrplot, ggplot2, gridExtra, grDevices, optimx, plot3D, stats, dplyr, tidyr Suggests: knitr, rmarkdown, icesSAG Anxo Paz <anxo.paz@hotmail.com> Comprehensive R Archive Network (CRAN) Anxo Paz [aut, cre], Marta Cousido Rocha [aut, ths], Santiago Cervino Lopez [aut, ths], Maria Grazia Peninno [aut] GPL-2 2026-05-14 application/tgz https://CRAN.R-project.org/package=knobi doi:10.32614/CRAN.package.knobi