STARRY RAY Amblyraja radiata
Publication of Advice: 7. June 2024. Published by Marine and Freshwater Research Institute.
Advice
MFRI advises in accordance with the MSY approach that catches in the fishing year 2024/2025 should be no more than 818 tonnes.
Stock development
Fishing pressure is below Flim and above FMSY. Stock biomass is above Blim and Btrigger.
Starry ray. Catches, changes in relative biomass (B/BMSY) and relative fishing mortality (F/FMSY). Shaded areas represent 95% CI.
Basis of the assessment and reference points
Basis of the advice | MSY approach |
Management plan | There is no management plan for this stock |
Assessment type | Surplus production model (SPiCT) |
Input data | Catch and standardized CPUE |
Approach | Reference point | Value | Basis |
|---|---|---|---|
MSY approach | MSY Btrigger | 0.5 | A fraction of BMSY where production is 50% of MSY |
FMSY | 1.0 | Fishing mortality values expressed relative to FMSY | |
Precautionary approach | Blim | 0.3 | A fraction of BMSY where production is 50% of MSY |
Flim | 1.7 | Fishing mortality which results in median SSB at Blim |
Prospects
Starry ray. Assumptions made for the interim year and in the forecast.
Variable | Value | Notes |
|---|---|---|
Projected catch (2024) | 254 | Short term forecatch under Fsq; in tonnes |
Stock size B2025/BMSY (2025) | 1 | Short-term forecast at status quo F (Fsq); in tonnes |
Fishing mortality F2023/FMSY (2024) | 0.83 | Status quo F: F2023/FMSY |
Starry ray. Projection of biomass (tonnes) based on the MSY approach.
Basis | Catch (2024/2025) | Fishing mortality (2025) | Stock size (2026) | % biomass change | % advice change |
|---|---|---|---|---|---|
MSY approach: FMSY | 818 | 0.83 | 1.06 | 1 | 0 |
Quality of the assessment
The basis for the assessment was changed in 2023. The assessment is now based on a surplus production model (SPiCT). The input data for the assessment model are total catch and standardized survey indices (IS-SMB). The IS-SMB covers the main fishing grounds of starry ray.
Starry ray Current assessment (red line) compared with previous estimate 2023.
Advice, tac and catch
Starry ray. Recommended TAC, national TAC, and catch (tonnes).
Fishing year | Recommended TAC | National TAC | Total catch |
|---|---|---|---|
2020/2021 | 988 | 899 | |
2021/2022 | 921 | 484 | |
2022/2023 | 1,105 | 287 | |
2023/2024 | 822 | ||
2024/2025 | 818 |
References and further reading
Pedersen, M. W., & Berg, C. W. (2017). A stochastic surplus production model in continuous time. Fish and Fisheries, 18(2), 226-243.
ICES. 2022. ICES technical guidance for harvest control rules and stock assessments for stocks in categories 2 and 3. In Report of ICES Advisory Committee, 2022. ICES Advice 2022, Section 16.4.11. https://doi.org/10.17895/ices.advice.19801564
MFRI Assessment Reports 2024. Starry ray. Marine and Freshwater Research Institute, 7 June 2024.