Publications by L Kell
ICES Assessment"
Introduction The Operating Model is based on the ICES stock assessment that was available at the start of the project (ICES 2022b). All coding is done using R (R Core Team 2021) and FLR (Kell et al. 2007) in Rmarkdown (Xie, Allaire, and Grolemund 2018), and summarised in as a vignette. The information (data, files, etc.) required to re-do the analy...
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MSE for Reference Case
Introduction The Operating Model is based on the ICES stock assessment. All coding is done using R (R Core Team 2021) and FLR (Kell et al. 2007) in Rmarkdown (Xie, Allaire, and Grolemund 2018), and summarised in as vignettes. The information (data, files, etc.) required to re-do the analysis, is available at ???, including the ICES assessment data ...
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Operating Model Conditioning
setwd("~/Desktop/gitTest/erp_mac/rmd") Introduction The Operating Model is based on the ICES stock assessment, where natural mortality is split into predation (M2) and background (M1) mortality, based on hypotheses from the Ecosystem Models. The assessment is then refitted, and a stock recruitment relationship estimated using priors from FishLife ...
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Blim
E. Adding Flexibility in Rebuilding Plans Calculating Tmax The NS1 guidelines provide guidance on determining the minimum (Tmin), maximum (Tmax), and target (Ttarget) time to rebuild a stock to a level that supports MSY (Bmsy). In the past, Councils have had difficulties calculating Tmax based on the original data-intensive method (i.e., Tmin + one...
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Adapt & Learn
16 October, 2023 Sea Urchin Management Plan Empirical Control Rule: Diver survey, catch, effort and length data Sea Urchin Management Plan Implementation Review: Periodically assess stock relative to reference points; requires time series and priors Currently data is limited but will get better, i.e. field sampling, tagging, lab based studies ...
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Adapt and Learn
28 September, 2023 Adaptive Management In natural resource management the importance of adopting adaptive management to reduce the risk of failing to achieve management objectives due to uncertainty has long been recognised (Walters and Hilborn 1978). Adaptive management involves learning by doing so that policies evolve as new observations and i...
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mvln
21 September, 2023 Blue Shark Example Blue Shark Example All code available as a vignette e.g. MCMC v MVLN Generic Method Provision of Advice What are the expectations? How to include uncertainties model selectivity combine fisheries derive \(MSY\) Stock specific modifications Length of projections Model v estimation error, i.e. Grid v MVL...
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BSH-MVLN
Historical Status Figure 1. Historical trends in \(SSB/B_{MSY}\) with marginal plot of current status, ribbons show inter-quartiles and \(90_{th}\) percentile, relative to median. Figure 2. Historical trends in \(F/F_{MSY}\) with marginal plot of current status, ribbons show inter-quartiles and \(90_{th}\) percentile, relative to median. Current...
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BH Projections
Figure 1. Historical trends in \(SSB/B_{MSY}\) with marginal plot of current status, ribbons show inter-quartiles and \(90_{th}\) percentile, relative to median. Figure 2. Historical trends in \(F/F_{MSY}\) with marginal plot of current status, ribbons show inter-quartiles and \(90_{th}\) percentile, relative to median. Figure 3. Historical and f...
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NEA Mackerel DD
Error in get_dropbox() : object 'info' not found Figure 1 Mass-at-age Figure 2 M-at-age Figure 3 Maturity-at-age ...
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