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Demersal Trawling with the Scotia

Marine Scotland Blog - 13 hours 25 min ago

MRV Scotia Programme
Survey: 0320S
Duration: 16 February – 9 March 2020

Objectives:
  1. Demersal trawling survey of the grounds off the north and west of Scotland in ICES Subarea 6a.
  2. Obtain temperature and salinity data from the surface and seabed at each trawling station.
  3. Collect additional biological data in connection with the EU Data Collection Framework (DCF).
  4. Retrieval and re-deployment of COMPASS moorings located at discrete sites within the survey area.
Procedures:

General: A training haul will be undertaken during the passage north to ensure all fishing gear/sensors are working effectively. Scotia will then commence fishing operations the next morning on predefined stations off the north Scottish coast and west of 4’W with weather conditions thereafter determining the route taken on the survey.

Trawling: This is a random-stratified survey design with trawl stations being distributed within 10 predefined strata that cover ICES subarea 6A (see figure 1). A total of 62 primary and 45 secondary stations have been generated. The intention is for the 62 trawls to be undertaken on suitable ground as near to the primary station as is practicable.

Hauls will be of 30 minutes duration unless circumstances dictate otherwise. Where possible, fishing operations will be restricted to daylight hours. In addition to the routine sampling, biological data and samples will be collected for target species in line with the EU data regulation and other external projects.

Hydrography: A Conductivity, Temperature and Depth (CTD) cast will be taken at each trawl station, weather permitting. Top and bottom temperatures will be reported and in addition, a calibration sample will be retained from the surface.

Compass Moorings: Six acoustic moorings were deployed at sites within the 0320S survey area during the second half of 2019. Two days have been allocated from this survey in order to retrieve and redeploy these.

An acoustic release system will be deployed from the vessel to trigger each mooring; this allows the mooring to surface, where it can be retrieved then re-deployed again.

Figure 2 0320S

Figure 2: 0320S – Location of Compass moorings

Figure 1 0320S

Figure 1. 0320S (SCOWCGFS-Q1) – 2020 ICES Subarea 6a Survey Strata showing primary (bold face) and secondary trawling stations (red dot – plain face).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Further Information:

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Smartfish H2020 collaborations

Marine Scotland Blog - Fri, 2020-02-14 16:31

The third annual meeting of the EU H2020 SmartFish project has concluded in Aberdeen.

As highlighted in an earlier blog, SmartFish is an important collaborative four-year project on fishing technology, led by SINTEF (Norway) and featuring key contributions from Marine Scotland Science. The third annual project meeting was held 11-13 February in the Sir Ian Wood Building, Robert Gordon University, Aberdeen, and was attended by 41 scientists from six countries.

The three days of the meeting were organised thematically, with day one focussing on summaries of project progress, day two continuing with this but adding a vital session on Intellectual Property Rights (essential in a multinational project), and day three featuring further round-ups and planning for the next year of work.

Continued involvement in EU projects of this kind remains very important for Marine Scotland Science, and the welcoming address by Dr Coby Needle, Chief Fisheries Advisor for Scotland, emphasised this.

Reflecting on the meeting he said:

“We extended a warm welcome to our visitors to Aberdeen, on the coldest week of the winter so far, and I was very happy to be able to say that we are continuing to work with European partners on work of critical value to the people of Scotland.

“The principles of innovation underpinning the project remain core to us, and we will remain part of all EU Horizon 2020 projects under the same conditions as pertained prior to the UK leaving the EU. This particular project is led by Norway, a non-EU country, and of the 41 participants in the meeting, 29 were from non-EU countries. Fish aren’t constrained by geographical boundaries, and important fisheries science such as this should be similarly unfettered.

“Our hosts at the Robert Gordon University were very accommodating and helpful, and I am pleased to say that our overseas visitors appreciated both the excellent meeting facilities and location, and the warm Aberdonian welcome – despite some chilly weather.”

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Vacancy: Shellfish Stock Assessment Modeller, closing date 10 March

Marine Scotland Blog - Fri, 2020-02-14 14:00

Salary: £29759 – £34087
Location: Aberdeen
Hours: Around 37.00 per week
Closing Date: 10 March 2020 at midnight
Reference: IRC82515E

 

We are currently seeking applications for a Shellfish Stock Assessment Modeller within Marine Scotland based in Aberdeen. This is a 24 month fixed term and pensionable appointment and new entrants will normally start on the minimum of the pay range. Candidates with a disability who meet the essential criteria below will be invited to the assessments.

The post of Shellfish Stock Assessment Modeller in the Stock Assessment and Modelling Group will play a key role in supporting the advice provided by Marine Scotland Science (MSS) to the Scottish Government. The post holder will be responsible for developing approaches (for data compilation and stock assessment) to be used in support of advice on sustainable shellfish fisheries management.

The Stock Assessment and Modelling Group is part of the wider Fisheries Assessment and Advice Programme within the Coastal and Offshore Fisheries Network of Marine Scotland Science, based at the Marine Laboratory, Aberdeen. This post will report to the Stock Assessment and Modelling Group leader.

 

Qualifications Required: 

For jobs in Band B & C you must hold a minimum of 3 Highers or equivalent.

Other qualifications equivalent to these may also be acceptable, if you are in any doubt please contact to discuss.

Please note: If you fail to demonstrate how you meet the minimum qualifications as stated above, your application will be automatically sifted out.

 

Essential Criteria:

1. Evidence of strong numeric ability with experience of applying mathematical models to environmental, biological or fishery systems.
2. Good computational skills with proven ability to programme in a high level language (such as R), particularly with respect to data manipulation and analysis.
3. Excellent communication skills with experience of preparing reports.
4. Strong planning and organisational skills, able to manage their own workload and prioritise effectively, dealing with competing demands.

 

Further Information:

For further information on this vacancy please download and review the “Person Specification and Further Information for Job Applicants“. To apply, you must fully complete and submit an online application via this website before the closing date. To learn more about this opportunity, please contact Helen Dobby who can be reached at Helen.Dobby@gov.scot or 01312443001.

If you experience any difficulties accessing our website or completing the online application form, please contact the recruitment team via recruitment@gov.scot.

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Vacancy: Senior Marine Ornithologist, closing date 10 March

Marine Scotland Blog - Fri, 2020-02-14 10:00

Salary: £37418 – £45241
Location: Aberdeen/Edinburgh
Hours: Around 37.00 per week
Closing Date: 10 March 2020 at midnight
Reference: IRC81300E

We are currently seeking applications for a Senior Marine Ornithologist within Marine Scotland based in Aberdeen or Edinburgh. This is a permanent and pensionable appointment and new entrants will normally start on the minimum of the pay range. Candidates with a disability who meet the essential criteria below will be invited to the assessments.

The post-holder will work in the Renewable Energy Environmental Advice (REEA) group at Marine Scotland Science (MSS) to contribute to achieving Scottish Government goals for marine renewable energy and for protecting the marine environment.

The post provides specialist advice on marine birds to Marine Scotland Licensing Operations Team (MS-LOT) to support the assessment of environmental impacts of marine renewable and construction developments, and the provision of advice to Marine Scotland’s Policy and Planning Division (MPPD) in support of renewable energy policy, marine environment policy and on Marine Protected Areas (including Special Protection Areas). The advice provided is placed into the context of the interactions of marine bird populations and licenced marine activities, and the legislation and regulatory processes that are relevant to marine birds in Scotland.

The successful candidate will be expected to work independently, coordinate their work programme with the existing B3 Senior Ornithologist and other staff within REEA, and gain input from more senior staff where appropriate e.g. when critical issues have been identified and for QA.

To underpin the advice provided, they must ensure that they are familiar with the best available science through maintaining a working knowledge of best practice and detailed knowledge of marine bird ecology.

Qualifications Required:

Post-graduate degree in a relevant biology subject or equivalent experience such as successfully delivering similar duties to those required of the Senior Marine Ornithologist post holder, or relevant research on seabirds.

Other qualifications equivalent to these may also be acceptable, if you are in any doubt please contact to discuss.

Please note: If you fail to demonstrate how you meet the minimum qualifications as stated above, your application will be automatically sifted out.

Essential Criteria:

1. A good understanding of seabird biology and regulation, legislation and research relating to marine birds in Scottish and European waters. Including a good understanding of ornithology assessment tools used in environmental assessments for collision risk modelling, displacement assessment, and population viability analyses.
2. Demonstrable data analysis and statistical skills, using specialist statistical software, such as R or Matlab.
3. The ability to work independently with good organisational skills and the ability to prioritise workload.
4. Excellent written and oral communication skills, including the ability to explain scientific concepts to varied audiences, maintain good working relationships and proactively support colleagues.

Further Information:

For further information on this vacancy please download and review the “Person Specification and Further Information for Job Applicants“. To apply, you must fully complete and submit an online application via this website before the closing date. To learn more about this opportunity, please contact Jared Wilson who can be reached on jared.wilson@gov.scot.

If you experience any difficulties accessing our website or completing the online application form, please contact HR Resourcing on 0131 244 8500 or via recruitment@gov.scot.

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Vacancy: Marine Mammal Biologist, closing date 5 March

Marine Scotland Blog - Thu, 2020-02-13 09:00

Salary: £29759 – £34087
Location: Aberdeen
Hours: Around 37.00 per week
Closing Date: 5 March 2020 at midnight
Reference: IRC81419E

We are currently seeking applications for a Marine Mammal Biologist within the Directorate for Marine Scotland Science (MSS) based in Aberdeen. This is a 12 month fixed term and pensionable appointment and new entrants will normally start on the minimum of the pay range. Candidates with a disability who meet the essential criteria below will be invited to the assessments.

The post-holder will work alongside the REEA staff at MSS to contribute to achieving Scottish Government goals for marine renewable energy and for protecting the marine environment. This will be achieved through contributing to the provision of advice to MS-LOT on interactions between marine mammals and the emerging marine renewable energy industries, and to MSPPD on marine mammal conservation issues. The post will also contribute to ongoing marine mammal research projects that involve the collection, processing and analyses of acoustic data. These activities will be placed into the context of the interactions of marine mammal populations and anthropogenic activities, and of the legislation that is relevant to marine mammals in Scotland.

To underpin advice, the post-holder will help to ensure that the best available science is incorporated into MSS activities and outputs. This will include the evaluation of the applicability of new methodologies relevant to marine mammals, and contributing to the commissioning and management of external research contracts.

The post-holder will need to be able to maintain and develop productive networks with relevant staff in external organisations, including SNH, JNCC, and academia. These networks will enable the post-holder to understand major developments in the scientific field, but there will also be a requirement to ensure that they continue to develop their skills and knowledge through understanding the relevant literature and continuous professional development. This will be a varied and interesting post in a highly applied scientific field, which will be suited to someone who enjoys a high level of autonomy and has the ability to successfully handle competing priorities.

 

Qualifications Required:

For jobs in Band B & C you must hold a minimum of 3 Highers or equivalent.

Other qualifications equivalent to these may also be acceptable, if you are in any doubt please contact to discuss.

Please note: If you fail to demonstrate how you meet the minimum qualifications as stated above, your application will be automatically sifted out.

 

Essential Criteria:

1. A good understanding of marine mammal biology.
2. Demonstrable data analysis and statistical skills, using specialist statistical software, such as R or Matlab.
3. The ability to work independently with good organisational skills and effectively manage projects.
4. Demonstrable experience of collecting, processing, analysing, and reporting on marine mammal passive acoustic or distribution, abundance of behavioural data.

 

Further Information:

For further information on this vacancy please download and review the “Person Specification“. To apply, you must fully complete and submit an online application via this website before the closing date. To learn more about this opportunity, please contact Ross Culloch by email or at 0131 244 3749.

If you experience any difficulties accessing our website or completing the online application form, please contact Emma Crawford on 0131 244 5656 or via recruitment@gov.scot.

The post Vacancy: Marine Mammal Biologist, closing date 5 March appeared first on Marine Scotland.

Testing technology in the fishing sector

Marine Scotland Blog - Wed, 2020-02-12 09:42

An international research project that is developing, testing and promoting new technology systems in the fishing sector is being trialled in Scottish waters by Marine Scotland scientists.

Now in its third year, the Smartfish H2020 project, which is funded through the EU’s Horizon 2020 fund and coordinated by the Norwegian research institute SINTEF Ocean, will be testing automated technologies that recognise, identify and counts fish in video footage from cameras on fishing boats.

Smartfish H2020 partners will discuss priorities for the third year of work, including how Marine Scotland plans on testing the technology in Scotland over the next two years, at a meeting in Aberdeen February 11 – 13.

Alongside this work to recognise, identify and count fish in video footage from cameras, Marine Scotland scientists have also been investigating the effects of light on the behaviour of different species of fish.

The Computer Vision System automatically identifying some whiting as they pass along a conveyor belt.

By steering them into different parts of the net, the fish may encounter other measures like ‘square mesh panels’ or sorting grids which can help smaller fish or less desirable species to escape.

Dr Coby Needle, Chief Fisheries Advisor for Scotland said:

“Over the last ten years Marine Scotland has been a leader in the field of using machine learning to recognise, identify and count fish in video footage from cameras.

“Using computers to automate the process in this way is a great step forward as it is quite a time consuming task for staff to go through and review videos manually.

“By using cameras we have to send fewer staff to sea on fishing vessels, which saves money and exposes them to less risk.”

Smartfish H2020

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International Day of Women and Girls in Science

Marine Scotland Blog - Tue, 2020-02-11 09:00

International Day of Women and Girls in Science is an opportunity for us to put the spotlight on some of the great work that’s going on in Marine Scotland Science.

This year’s big day also marks the first since we were awarded the Bronze Award by the Athena SWAN Charter as part of our work to tackle gender inequalities in science and engineering.

The Award recognises work undertaken to address gender equality in Higher Education and Research Institutes.

Dr Carey Fraser who leads on diversity and inclusion within Marine Scotland Science said:

“It is clear that more diverse teams perform better and produce better science. The science in Marine Scotland provides key evidence, information and functions for Scottish Government.

“There is an incredibly wide range of scientific work here that requires many STEM disciplines to sample, analyse and research our seas and rivers, and the habitats, animals and plants within them. We need a diverse range of skills and people to work on research vessel surveys, at rivers, and in our laboratories, to carry out the detailed biological, chemical, physical and mathematical analysis of samples and data that provides information of international significance with direct impact on marine management in Scotland and globally.”Berit Rabe_Scotia trip

Dr Berit Rabe is a physical oceanographer who has been working in Marine Scotland for around nine and a half years.

She works with oceanographic field data and hydrodynamic model outputs to understand the dynamics and circulations of sea lochs and the coastal regions around Scotland and to investigate sea lice dispersal.  She said:

“One of my proudest moments was becoming the designated female Scientist in Charge (SiC) for the December hydrographic research cruise to the northern North Sea and the Faroe-Shetland-Channel. This involves organising logistics before and after the cruise, ensuring we are achieving our scientific objectives, and leading the scientists at sea. I’ve enjoyed this role so much I’ve now been SiC taken on this role six times.

“It’s also been really incredible to be part of the team that achieved the Athena SWAN Bronze Award. Before the Athena SWAN Working Group was established there was no clear official route for staff to take on the role as SiC or gain experience to help them progress. Now I am helping to implement a process for training and progression that is assisting junior staff members, regardless of gender, to gain the experience they need to progress in their scientific discipline.”

Dr Faye Jackson has been working for Marine Scotland Science for nearly two years after being based at the Freshwater Fisheries Laboratory in Pitlochry during her PhD.

Her work is focused on understanding and predicting river temperature to identify where our famous salmon rivers are at risk due to climate change and developing tools and advice to support management decisions.  She said:

“Working at the Freshwater Fisheries Lab is a really interesting job, I’m constantly learning and looking for ways to take what can be a complicated story and distil it down to something that is accessible to people. It involves such a broad range of skills – analysing complicated data, making maps and making visual summaries which can then help river managers and others make decisions.  One of the benefits of being a scientist in the Scottish Government is getting to work on large scale projects that do have a genuine impact and have wider policy implications. With increases in river temperatures as a result of climate change, work which can underpin evidence-based management of the freshwater environment and protect iconic fish like salmon is even more crucial.”

More reading:

Dr Jessica Craig – Fisheries Population Modeller
Dr Berit Rabe – Physical Oceanographer
Pam Walsham -Senior Environmental Chemist 
Dr Faye Jackson – Salmon Assessment Modeller
Dr Rebecca Langton – Species Distribution Modeller

The post International Day of Women and Girls in Science appeared first on Marine Scotland.

Peterhead Fish Market

Marine Scotland Photos - Wed, 2020-02-05 15:36

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Peterhead Fish Market

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Assessing Plankton in the UK

Marine Scotland Blog - Mon, 2020-02-03 09:00

Two scientists from Marine Scotland Science (MSS), Dr Eileen Bresnan and Dr Margarita Machairopoulou, have been involved in the first ever assessment of the status of the plankton community in UK waters.

Led by the University of Plymouth, scientists from all around the UK joined together to share their datasets and knowledge to fill in some of the scientific gaps and understand change in pelagic habitats. The collective expertise of the group was critical in producing and interpreting the results.

Key to this assessment is the development of a new plankton lifeform indicator tool which enables assessment of pelagic habitat plankton diversity, regardless of sampling methods. There are thousands of phytoplankton and zooplankton species in UK waters – for this analysis they are collated into functional groups, called lifeforms, that perform similar functions in the ecosystem or have similar biochemical characteristics and lifecycles. Examples of lifeforms are: diatoms/dinoflagellates (silicate/flagellated microalgae) and holoplankton/meroplankton (animals that spend whole/part of their lifecycle in the water column).

This map shows the location of the different plankton monitoring programmes that were included in the assessment. Data from the MSS Scottish Coastal Observatory (SCObs) stations has made a key contribution to this study, particularly in the data poor areas on the west coast of Scotland. The SCObs monitoring sites at Stonehaven and Loch Ewe represent two of the three monitoring sites in the UK (L4 off Plymouth) where coastal zooplankton are monitored.

The main findings from the ICEGRAPH Project include:
  1. That the plankton community in UK waters has exhibited profound changes in distribution and abundance. For example, meroplankton (plankton who spend only part of their life cycle in the water column e.g. the larvae of star fish, sea urchins) are showing an increasing trend in abundance in both coastal and offshore areas around the UK. While diatoms (a type of microscopic algae) are increasing only in the northern North Sea (including areas around Orkney and Shetland), as well as the south east of England. However, some life forms e.g. dinoflagellates (another type of microscopic algae) show different trends between coastal (increasing) and offshore (decreasing) areas.
  2. These changes in the plankton community can impact energy flow in the marine food web to higher trophic levels (e.g. shifts in the balance between the abundances of small and large copepods (small crustaceans) can potentially alter the quality of food available to fish). The impacts of these changes on commercial fish stocks require investigation.
  3. Some of these changes have been linked to sea surface temperature (SST), which has warmed around the UK. SST has been used as a proxy for climate change as other physical/biological factors such as water column stability/ prey availability which can influence plankton abundances are also influenced by warming temperatures.

 

Further Information:
  •  The ICEGRAPH Project is funded by the European Maritime and Fisheries Fund (EMFF) and the Marine Management Organisation (MMO).
  • Plankton are organisms that live and drift in the water column. Phytoplankton are microscopic single celled algae. They occupy the base of the marine food web using the energy from sunlight to produce carbohydrates and releasing oxygen via the process called photosynthesis. Phytoplankton are ecologically important. They are a major food source for zooplankton, act as a carbon sink by taking up CO2 dissolved in the water and producing 50% of the earth’s oxygen. Zooplankton are animals with sizes that range from microscopic (e.g. star fish larvae) to visible with the naked eye (e.g. jellyfish). They feed on phytoplankton and some on other zooplankton. Zooplankton, in turn, are preyed on by fish larvae some of which have a high commercial importance such as cod and herring. Thus energy from phytoplankton is passed up the food web.
  • The water above the seabed is called the pelagic habitat. It is really important to be able to assess the status of the plankton in the pelagic habitat as it allows the detection of change that could potentially impact higher trophic levels and negatively impact the marine ecosystem.
  • Scottish Coastal Observatory (SCObs) topic sheet
  • SCObs report
  • North Atlantic Fisheries College
  • Orkney Harbour Authority
  • Improving Confidence Evaluating GES for Regional Assessments of Pelagic Habitats (ICEGRAPH)

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Recent Decrease in Ocean Salinity in the North Atlantic Waters off Scotland

Marine Scotland Blog - Fri, 2020-01-31 11:52

Research published in Nature Communications this week has investigated the recent, large reduction in salinity measurements in the North Atlantic Ocean. Evidence of this surface salinity change includes the time series collected by Marine Scotland Science in the Faroe-Shetland Channel.

Scientists observed the freshening event over a large region of the North Atlantic, extending from waters to the west of the UK to Iceland in 2016. For some of the observational time series, the measured salinities were the lowest since records began in the late 19th century. In the Faroe-Shetland Channel, lower salinities were observed during the Great Salinity Anomaly in the 1970s, which was caused by increased freshwater transport through Fram Strait (the passage between Greenland and Svalbard) and winds driving increased freshwater transport from the Greenland shelves.

Observed salinities in the North Atlantic Water in the Faroe-Shetland Channel, collected by Marine Scotland Science. The colour of the bars corresponds to the standardised anomaly relative to the 1981-2010 average (as mean) and standard deviation. The observed salinity is plotted as a bar from the 1981-2010 average salinity (35.387).

The recent salinity change has a different mechanism and was caused by abnormal wind patterns driving Arctic freshwater from the Labrador Current (close to the Canadian continental shelf) into the North Atlantic Current. This current transports waters from the North American region of the Atlantic Ocean towards the UK coast. It is an important influence on environmental conditions in the waters off the Scottish West Coast. This work shows that understanding changes in the circulation further westward in the subpolar North Atlantic provide important context for conditions in our region.

The Great Salinity Anomaly of the 1970s impacted the ecosystem productivity in our region. Some of the authors of this study are currently considering the impact of this recent freshening event on the biological productivity.

Caption for Main Feature Image: Map showing the average surface circulation in the North Atlantic Ocean, arrows show surface current vectors (coloured by strength). The schematic representation of the major currents is overlain in red (in deep water) and yellow (continental shelf). North Atlantic Current (NAC), East Reykjanes Ridge Current (ERRC) East Greenland Current (EGC), West Greenland Current (WGC), Labrador Current (LC) and Mann Eddy (ME). From Holliday et al., 2020.

Further Information

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Survey of Scallop Stocks around Shetland Islands

Marine Scotland Blog - Mon, 2020-01-27 14:30

MRV Alba na Mara Programme
Survey: 0220A
Duration: 25 January – 9 February 2020
Fishing Gear: Scallop dredges

Objectives:

1. To carry out a survey of scallop stocks around the Shetland Islands.

2. To age, measure and assess shell damage on all scallops caught.

3. To collect information on by-catch of other commercial fish and shellfish species.

4. To identify, quantify numbers, and damage assess of starfish species in all dredge tows.

5. To collect whole scallops for heavy metal testing as part of the OSPAR assessment of hazardous substances in the marine environment.

 

Procedure:

Figure 1

The survey will depart Fraserburgh on 25 January and, after vessel drills, make passage for Shetland.

Scallop dredge hauls will be made at sites used on previous surveys as shown Figure 1. Hauls will be of 30 minutes duration. From each haul, all of the scallops will be measured to the half centimeter below and aged. Numbers and size distribution of commercial fish and shellfish species will be recorded along with scallop shell damage and starfish numbers and species.

The survey will end in Fraserburgh on 9 February when staff and gear will stay on board to carry out survey 0320A.

 

Further Information:

The post Survey of Scallop Stocks around Shetland Islands appeared first on Marine Scotland.

Demersal Trawling Survey in North Sea

Marine Scotland Blog - Mon, 2020-01-27 11:00

MRV Scotia Programme
Survey
: 0220S
Duration: 24 January – 13 February 2020
Fishing Gear: GOV Trawl (BT 137) with ground gear A & B; MIK Net (Round Frame with IK depressor); MIKeyM net (attached onto the MIK net on selected stations)

 

Objective:

1. To complete an internationally coordinated demersal trawling survey in the North Sea in ICES area IV.
2. To undertake MIK sampling for pre-metamorphosed herring and sprat larvae during the hours of darkness within the trawl survey area. MIKeyM samples will also be collected from the MIK deployments.
3. To obtain temperature and salinity data from the surface and seabed at each trawling station using a SEABIRD 19+ CTD.
4. To collect samples of surface and near seabed water for nutrient analysis (nitrates, silicates and phosphates).
5. To collect additional biological data in connection with the EU Data Collection Framework (DCF).
6. To collect electronic monitoring footage of selected species of known length on the conveyor belt.

 

Trawling:

Hauls of 30 minutes duration will be made using the GOV trawl. Wherever possible, fishing will be carried out during daylight hours as defined below:

 

Daylight period – GMT South of 57 30’N North of 57 30’N 24-31 January 0747 – 1635 0815 – 1545 1-10 February 0729 – 1658 0749 – 1636 11-13 February 0708 – 1720 0723 -1705

 

For each degree of longitude west, four minutes will be added to the time; for each degree of longitude east, four minutes will be subtracted.

 

The survey area is outlined in the attached chart (see Figure 1) but the exact fishing position will be decided in collaboration with the fishing master. The Scanmar system will be used throughout the survey to monitor headline height, wing spread, door spread and distance covered during each haul. A bottom contact sensor (BCS) will be attached to the ground-gear and the data collected will be downloaded after each haul.

 

Catches will be processed as per the most recent version of the IBTS sampling manual (ICES SISP 10 –IBTS IX) with additional biological data collected for species as determined.

 

MIK Sampling

Pre-metamorphosed herring larvae will be sampled during the hours of darkness with the MIK mid-water trawl (Round frame). A minimum of two double oblique tows is planned for every square within the assigned survey area. The vertical profile of the tow will be monitored using the Scanmar system. During this survey the small 20 mm round frame net (MIKeyM net) will also be deployed on all MIK stations for the purpose of collecting pelagic fish eggs from the survey area.

 

Hydrography

Surface and bottom temperatures and salinities will be taken at all trawl stations.

Figure 1: Scottish survey area for 0220S. Dashed line at 57.5 degrees north indicates dividing line between groundgear types (A south of line, B north of line).

 

Additional Information:

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Marine Scotland aerial operations - Inverness, November 2019

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MPV Jura in Aberdeen - January 2020

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