An updated statistical catch-at-length assessment for Eastern Atlantic bluefin tuna

Butterworth and Rademeyer (2013) provided an initial Statistical Catch-at-Length (SCAL) assessment of the eastern populations of North Atlantic bluefin tuna. The primary purpose in fitting to length- rather than to age distribution data was to avoid the need to make use of the somewhat coarse cohort...

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Bibliographic Details
Main Authors: Doug Butterworth, Rebecca A Rademeyer
Format: Report
Language:unknown
Published: 2022
Subjects:
Biological Mathematics
Applied Statistics
Biostatistics
statistical catch-at-length (SCAL) assessment
East Atlantic Ocean
bluefin tuna population
population dynamics (ecology)
fisheries stock assessment
Butterworth
North Atlantic
Online Access:https://doi.org/10.25375/uct.19114640.v1
https://figshare.com/articles/report/An_updated_statistical_catch-at-length_assessment_for_Eastern_Atlantic_bluefin_tuna/19114640
Description
Summary:Butterworth and Rademeyer (2013) provided an initial Statistical Catch-at-Length (SCAL) assessment of the eastern populations of North Atlantic bluefin tuna. The primary purpose in fitting to length- rather than to age distribution data was to avoid the need to make use of the somewhat coarse cohort-slicing method to provide the latter. Here these analyses are updated using comparable inputs to those agreed for the initial 2014 updated VPA assessments. The results suggest a spawning biomass time series similar to that estimated by VPA over the 1975 to 2005 period, but lower after and appreciably higher before this period.

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