Rose vs. Rho: a comparison of two approaches to address retrospective patterns in stock assessments

Legault, Christopher M

doi:10.1093/icesjms/fsaa184

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The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

i

Rose vs. Rho: a comparison of two approaches to address retrospective patterns in stock assessments

2020
By Legault, Christopher M
Source: ICES Journal of Marine Science, Volume 77, Issue 7-8, December 2020, Pages 3016–3030

[PDF-1.39 MB]

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Details:

Journal Title:

ICES Journal of Marine Science
Personal Author:

Legault, Christopher M
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; NEFSC (Northeast Fisheries Science Center)

NMFS (National Marine Fisheries Service) ; NEFSC (Northeast Fisheries Science Center) Less -
Description:

Two approaches to address retrospective patterns in stock assessments are compared. The Rose approach is an ensemble of models that all remove the retrospective pattern through changes in data, parameter values, or model assumptions. It is time intensive and can result in a wide range of historical abundance trends. The Rho approach modifies the terminal year estimates of a single model that exhibits a retrospective pattern. It is fast and easy to apply but results in a discontinuous time series. Neither approach identifies the source of the retrospective pattern. The pros and cons of these two approaches are compared in terms of catch advice and stock status using four examples with varying strength and direction of retrospective patterns. The choice of which approach to use could be based on time and expertise available to conduct and maintain an assessment, with Rose preferred if a lot of both are available while Rho preferred otherwise. If the Rho approach is used, managers should consider adjusting their control rule or risk buffer to account for the difference between Rose and Rho results shown here.
Keywords:

[+]

Fishery Management Fish Stock Assessment Aquatic Science Ecology Ecology, Evolution, Behavior And Systematics Ensemble Modelling Mohn’s Rho Oceanography Retrospective Analysis Stock Assessment
Source:

ICES Journal of Marine Science, Volume 77, Issue 7-8, December 2020, Pages 3016–3030
DOI:

https://doi.org/10.1093/icesjms/fsaa184
Document Type:

Journal Article
Rights Information:

Public Domain
Compliance:

Submitted
Main Document Checksum:

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urn:sha256:cf4378a305e11a2da4aa9ed28ef6918b5e2ec66d60aed528fd6b8e4c52be0b21
Download URL:

https://repository.library.noaa.gov/view/noaa/47885/noaa_47885_DS1.pdf
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