LING Molva molva

Advice 2024/2025

6 479

tonnes

Advice 2023/2024

6 566

tonnes

Advice change

-1 %

Publication of Advice: 7 June 2024. Published by Marine and Freshwater Research Institute.


Advice

MFRI and ICES advise that when the Icelandic management plan is applied, catches in the fishing year 2024/2025 should be no more than 6 479 tonnes.

Stock development

Fishing pressure is above FMGT but below Flim, and Fpa. Spawning-stock size is above MGT Btrigger, Bpa, and Blim.

Ling. Catch by gear types, recruitment (age 2), fishing mortality (ages 8–11), and spawning stock biomass (SSB). Shaded areas and error bars show 95% confidence intervals.

Basis of the assessment and reference points

Basis of the advice

Management plan

Management plan

TAC set using the ICES advice rule with a fishing mortality FMGT = 0.23 applied to ages 7 to 10, modified by the ratio SSBy/MGT B~trigger~ when SSBy < MGT B~trigger~. The expected range of realized fishing mortalities (F) following the management plan (FMGT) is between 0.15 and 0.31.

Assessment type

Statistical catch at age model (SAM)

Input data

Age and length data from commercial catches and surveys (IS-SMB, IS-SMH and IS-SMN) and total catches.

Approach

Reference point

Value

Basis

MSY approach

FMSY

Leads to long-term MSY, based on stochastic simulations (EqSim).

MSY Btrigger

Based on Bpa

Management plan

MGT Btrigger

From the management plan

FMGT

From the management plan

Precautionary approach

Blim

9 000

Lowest SSB (2016) where large recruitment was observed

Bpa

11 100

Blim x e^1.645 * 0.2^

Flim

0.95

Fishing mortality that in stochastic equilibrium will result in median SSB at Blim

Fpa

0.62

Fp05, maximum F at which the probability of SSB falling below Blim is <5%

Prospects

Ling. Assumptions made for the interim year and in the forecast.

Variable

Value

Notes

Catch (2024)

6 732

Results from Fages–5-10 (2024); in tonnes.

SSB (2025)

28 271

Short-term forecast; in tonnes

Recruitment age 2 (2025)

3 327

Estimated by the model; in thousands

Recruitment age 2 (2026)

3 327

Averaged from the past 10 years of the assessment; in thousands

Fages­8-11 (2024)

0.31

Assuming status quo F (average over the last three years) for 1 January–31 August 2024 and FMGT for 1 September–31 December 2024; tonnes

Ling Projection of SSB (tonnes) on catch according to management plans.

Basis

Catch (2024/2025)

Fishing mortality (2024/2025)

SSB (2026)

% SSB change1)

Advice change2)

Management plan

6 479

0.3

26 622

-6

-1

1) SSB in 2026 relative to SSB in 2025

2) Advice value for 2024/2025 relative to advice value for 2023/2024 (6566 t)

Quality of the assessment

In the evaluation of the management plan (MP) for tusk in Icelandic waters (ICES, 2022a), the basis for assessment was revised and the adopted harvest control rule (HCR) was considered in accordance with the precautionary approach and consistent with the ICES MSY framework. The results of the assessment in 2024 are in line with those in 2023.

Ling. Current assessment (red line) compared with previous estimates 2020–2023.

Advice, TAC and catch

Ling. Recommended TAC, national TAC, and catches (tonnes).

Fishing year

Recommended TAC

National TAC

Catches Iceland

Catches other nations

Total catch

2010/2011

7  500

7  500

9  327

9  327

2011/2012

8  800

9  000

10  072

0

10  072

2012/2013

12  000

12  000

11  125

44

11  140

2013/2014

14  000

14  000

11  794

1  763

12  982

2014/2015

14  300

14  300

11  684

1  974

13  658

2015/2016

16  200

16  200

9  773

1  456

11  229

2016/2017

9  343

9  343

7  291

1  135

8  426

2017/2018

8  5981)

8  598

7  017

1  309

8  326

2018/2019

6  2551)

6  255

6  927

1  101

8  028

2019/2020

6  5991)

6  599

5  972

1  183

7  155

2020/2021

5  7001)

5  700

6  201

1  012

7  213

2021/2022

4  7351)

4  735

5  814

885

6  699

2022/2023

6  0982)

6  098

7  511

926

8  437

2023/2024

6  5662)

6  566

2024/2025

6  4792)

1) 18 % harvest control rule

2) FMGT = 0.3

References and further reading

ICES. 2022. Workshop on the evaluation of assessments and management plans for ling, tusk, plaice and Atlantic wolffish in Icelandic waters (WKICEMP). ICES Scientific Reports. 4:37. 271 pp. http://doi.org/10.17895/ices.pub.19663971

MFRI Assessment Reports 2024. Ling. Marine and Freshwater Research Institute, 7 June 2024.