2017 I NDUSTRY - SCIENCE S URVEY OF H ERRING IN 6 A N Steven - - PowerPoint PPT Presentation

2017 INDUSTRY-SCIENCE SURVEY OF HERRING IN 6AN

Steven Mackinson1, Martin Pastoors2, Susan Lusseau3, Eric Armstrong3, Steven O’Connell, Dick de Haan4, Dirk Burgraaf4, Alexander McClean5, Bruce Langlands5, Andrew Scott, Alex Wiseman1.

1 Scottish Pelagic Fishermen’s Association, Scotland 2 Pelagic Freezer Trawler Association, Netherlands 3 Marine Scotland, Scotland 4 Wageningen Marine Research, Netherlands 5 Scottish Fishermen’s Federation, Scotland

Sunbeam (James Duthie), Wiron 5&6 (Jan Melis/ Adrie Hoek), Lunar Bow (AJ Buchan & Alex Buchan) Dirk Dirk (Jaco van Duijvenvoorde), Antares (Lowrie Irvine)

Pla lan

Aim To improve the knowledge base for the spawning components of herring in VIa North and 6a South-7b,c, and submit it to ICES to assist in assessing the herring stocks and contribute to establishing a rebuilding plan. In 2017, three SPFA vessels, and three PFA vessels will participate in the survey work. Survey Objectives

• Collect acoustic data and information on the size and

age of herring to allow estimation of the abundance

• f spawning components of herring in VIa North
• Collect morphometric and genetic data to

distinguish whether the 6aN stocks are different from the stocks in 6aS, 7b,c.

Acoustic Survey desig ign

Area 4: Hebrides Area 3: N. Minch Area 2: East of Cape Wrath

Timing and area coverage

Sun 20-Aug Mon 21-Aug Tue 22-Aug Wed 23-Aug Thu 24-Aug Fri 25-Aug Sat 26-Aug Sun 27-Aug Mon 28-Aug Tue 29-Aug Wed 30-Aug Thu 31-Aug Fri 01-Sep Sat 02-Sep Sun 03-Sep Mon 04-Sep Tue 05-Sep Wed 06-Sep Thu 07-Sep Fri 08-Sep Sat 09-Sep Sun 10-Sep Mon 11-Sep Tue 12-Sep

Area 1 Dirk Dirk (Catch sampling) Antares (Biol / Gen / Morphometrics) Area 2 Sunbeam (Acoustics)

?

Dirk Dirk (Biol / Gen / Morphometrics)

C

Wirons (Acoustics)

C

Antares (Biol / Gen / Morphometrics) Area 3 Sunbeam (Acoustics)

F F F F F F

Lunar Bow (Acoustics)

C F

Dirk Dirk (Biol / Gen / Morphometrics)

F

Antares (Biol / Gen / Morphometrics)

F

Area 4 Sunbeam (Acoustics)

C

Dirk Dirk (Biol / Gen / Morphometrics)

C

Antares (Biol / Gen / Morphometrics)

Sunbeam: 20 Aug to 13 Sep

Lunar Bow: 27 Aug to 7 Sep

Dirk Dirk: 26 Aug- 5 sept

Antares: 4 - 9 Sept

Wiron 5&6: 31 Aug- 6 sept

A brief snippet…

https://m.facebook.com/story.php?story_fbid=1418028631 565529&id=156581724376899

full details BBC Scotland ‘Landward’, Friday 6th October

Data overview

Area Hauls Biological samples Morhometric samples Genetic samples Hauls with spawners 2 2 170 93 93 3 25 1180 360 701 11 4 6 184 120 120 Grand Total 33 1534 573 914 11

Area 1 – 9 hauls

Report card

Good ✓Calibration ✓Each acoustic survey completed 2x ✓ Samples of spawning fish collected for genetics ✓Enough biological samples ✓(nearly) Every commercial haul sampled ✓Modified nets ✓Flexibility to adapt to conditions Could do better

• Sample size
• Clarity on objectives
• Vessels suited to task
• Notify creel fishermen
• Timing and continuity

– intel from what is happening in the North Sea

Proposed survey in 2017, 6aS, 7bc Mike O’Malley 1 industry vessel - Calibration in Killybegs 10 day survey Transect spacing: 7.5nmi (3nmi in Donegal Bay and zig/zag in Lough Swilly Transect length: 1740nmi Timing: ~ November 10th

Questions?

• For any questions, remarks or suggestions, please contact:
• Steven Mackinson (steve.mackinson@scottishpelagic.co.uk)
• Martin Pastoors (mpastoors@pelagicfish.eu)

Next

• De-briefing and Data collation meeting 30 Oct-1 Nov
• 6aS, 7bc survey - November