Advice and Scenarios Database



Spurdog (Squalus acanthias) in subareas 1-10, 12 and 14 (the Northeast Atlantic and adjacent waters)
StockCode (Assessment Component)
dgs.27.nea
Assessment Year
2026
Stock Category
1
Purpose
Advice
Published
Stock Assessment Key
25850
Link to Advice Sheet
https://doi.org/10.17895/ices.advice.30932039






Catch scenarios


Basis
Total Catch
Harvest rate * (ages 5-30)
Btot
% Btot change**
% Advice change ***
Probability of SSB (2028) below Blim ^
2027 2017 2028 2028 2027 2028
(t) (ratio) (t) (%) (%) (%)
ICES Basis Advice
MSY approach, HR = HR MSY 20124 0.043 716919 1.47 -10.9 1
Other scenarios
HR = 0 0 0 737196 4.3 -100 1
HR = HRsq 5484 0.0106 731663 3.6 -76 1
HR = HRpa 31337 0.067 705611 -0.129 39 1




Symbol Footnotes
* Harvest rates differ slightly between years and from their respective reference points owing to differences in age structure over time.
** Total biomass for 2028 or 2029 relative to the total biomass for 2027.
*** Advice value for 2027 and 2028 relative to advice value for 2026 (22 594 tonnes).
^ The probability of SSB being below Blim in 2029. This is calculated by applying ±3 SD (~99.7% confidence interval), which were used to represent uncertainty around Blim. All catch options remain above this precautionary threshold, indicating a less than 1% probability of the stock falling below B lim.