Benchmark workshop on Pandalus stocks (WKPRAWN) ...
Benchmark results Northern shrimp ( Pandalus borealis ) in divisions 3.a and 4.a East (Skagerrak and Kattegat and northern North Sea in the Norwegian Deep) An ensemble model was developed to incorporate uncertainty in natural mortality (SS3 model). A distribution of possible natural mortalities at a...
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| Format: | Report |
| Language: | English |
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ICES Scientific Reports
2024
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| Online Access: | https://dx.doi.org/10.17895/ices.pub.19714204.v1 https://ices-library.figshare.com/articles/report/Benchmark_workshop_on_Pandalus_stocks_WKPRAWN_/19714204/1 |
| Summary: | Benchmark results Northern shrimp ( Pandalus borealis ) in divisions 3.a and 4.a East (Skagerrak and Kattegat and northern North Sea in the Norwegian Deep) An ensemble model was developed to incorporate uncertainty in natural mortality (SS3 model). A distribution of possible natural mortalities at age was constructed based on a suite of M life history and other type models. Three M scenarios were developed: a low, median and high M. An objective weighting approach was used based on model performance statistics and diagnostics to develop the final assessment. The reference points were estimated using a shortcut MSE approach testing a range of fishing mortalities and biomass thresholds in relation to virgin stock size (B0). Northern shrimp ( Pandalus borealis) in subareas 1 and 2 (Northeast Arctic) For the Barents Sea stock, the accepted assessment model fell on SPiCT. The commercial CPUE used in the assessment was thoroughly investigated and standardized using a non-spatial model. A spatio-temporal modelling ... |
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