Marine Scotland

Jointly Surveying Marine Protected Areas

October 20, 2017 by No Comments

Figure 1: Location of Marine Protected Areas to be visited by 1517S survey.

Duration: 20 October – 9 November 2017

Fishing Gear

  • TV drop frame and wiring harness
  • TV sledge and wiring harness
  • Valeport mini-CTD
  • 0.25m2 USNEL BSL Box core
  • 0.1m mini Hamon grab
  • 0.1m Day Grab (backup)
  • 0.1m Van Veen Grab (backup)

Background

Marine Scotland Science (MSS) and the Joint Nature Conservation Committee (JNCC) will undertake an offshore seabed survey in the Northeast Faroe-Shetland Channel (NEF hereafter), Scottish Nature Conservation Marine Protected Areas (NCMPA) and the Wyville Thomson Ridge (WTR) on the Marine Research Vessel (MRV) Scotia (Figure 1).  Habitats within the NEF MPA vary down the slope with the descent into deeper (arctic) water.  In particular the FSC survey will focus on deep-sea sponge aggregations that are expected to be found between depths of 400 and 600 m.  The MPA represents the variation in sand, mud and gravel habitat types present, and the animal communities they support.

Objectives

Figure 2: Sampling boxes A, B and C with chariot tow start and end points for North-east Faroe-Shetland Channel NCMPA.

  1. Conduct a Type 1 (Henry and Roberts, 2014) monitoring survey of the NEF NCMPA focusing sampling within boxes positioned to allow for sampling to occur across the range of depths, biological zones and proposed management measures at the site. This will include visual (camera) and physical (box corer or grab)sampling (Figures 2 and 3). Visual data will be collected from areas understood to contain deep-sea sponge aggregations within the site boundary (Box A) and from adjacent areas outside the site (Boxes B and C) along the same depth contours. Physical samples will be obtained for further for further characterisation of the wider seabed within the site (Box D). Environmental data will be collected during visual sampling.

    Figure 3. Physical sampling stations (60) generated for NEF NCMPA in Box D (purple). Note 30 of these stations are considered core with a further 30 contingency only.

  2. Conduct a Type 1 monitoring survey of the WTR (Figures 4 and 5) focusing on sampling within boxes A, B and C which are positioned to allow for sampling to occur across the range of depths, biological zones and proposed management measures at the site. The focus will be on visual (camera) methods only. Environmental data will be collected during visual sampling.

Narrative

After completion of safety drills and exercises, there will be shakedown deployments of the chariot, box corer and Harmon grabs.  Thereafter, Scotia will proceed north towards the NEF area.

In boxes A-C four long (~3km) chariot tows (Figure 2) will be used to characterise the epifaunal communities present within the boxes and 16 short (200m) drop-frame camera transect stations (not illustrated) will facilitate collection of high definition video and still images. In box D 60 stations have been generated of which a core 30 will be prioritised for physical sampling.  Initially the vessel will sample with chariot and box core/Harmon grab in alternate 12 hour shifts until all chariot runs are completed.  Thereafter, sampling may concentrate on the dropframe runs until these are completed with the remainder of the time used for remaining box core/Harmon grab deployments.  Where time permits sampling of suitable sponge aggregations may be undertaken in boxes B or C using box core or Harmon grab.

Figure 4. WTR sampling box A and drop-frame stations.

Upon completion of work at NEF the vessel will proceed to WTR and visually sample in box A using the drop frame using a systematic grid approach (Figure 4). Sampling will also focus on the area within and adjacent to a proposed static gear closure to determine the distribution and extent of Vulnerable Marine Ecosystems (VMEs), including sponges and corals (Figure 5).

Figure 5. WTR sampling boxes B and C along with existing data and drop-frame stations.

Tables 1-3 show positional information for the visual aspects of the survey. Positions of physical sampling stations and all contingency stations will be available to MRV Scotia.

For the purposes of this survey the NEF will be prioritised over the WTR and visual sampling will be prioritised over physical sampling.

Contingency plans in NEF to undertake further physical sampling in box D where moderate conditions preclude camera work. In WTR contingency for moderate weather is sampling with Harmon grab at a predefined location to the west of the site.  In both cases contingency includes transit to already identified inshore survey locations in the event of prolonged unworkable conditions.

A full and detailed survey plan and scientific rationale will be presented at the pre-brief meeting, before the beginning of the survey.

Table 1: NEF Chariot tows and positions.

Stn CodeDeploymentRecovery
Box ADeg
NEF_Tow_A016157.268N037.968W6158.047N034.842W
NEF_Tow_A026156.861N027.718W6157.465N023.990W
NEF_Tow_A03620.908N017.895W621.251N014.178W
NEF_Tow_A04620.183N010.523W620.686N06.927W
Box B
NEF_Tow_B016143.293N113.743W6144.086N110.655W
NEF_Tow_B026143.705N13.603W6144.801N10.763W
NEF_Tow_B036147.890N059.275W6149.142N056.121W
NEF_Tow_B046150.701N048.649W6151.817N046.022W
Box C
NEF_Tow_C01624.079N06.789E624.841N09.945E
NEF_Tow_C02622.049N017.017E622.325N020.493E
NEF_Tow_C03626.553N026.445E626.877N030.181E
NEF_Tow_C04626.225N038.439E626.706N042.059E

 

Table 2: NEF Dropframe stations and positions.

Stn CodeDegDecMinNDegDecMinE/W
Box A
NEF_A016157.710N036.368W
NEF_A02621.068N016.077W
NEF_A03620.519N08.663W
NEF_A046157.172N025.510W
NEF_A056156.608N040.328W
NEF_A066159.047N031.353W
NEF_A076159.852N027.042W
NEF_A08620.499N022.013W
NEF_A096154.385N038.684W
NEF_A106156.026N033.050W
NEF_A116158.003N019.744W
NEF_A12621.060N03.211W
NEF_A136158.959N016.145W
NEF_A146159.802N012.673W
NEF_A15621.962N010.896W
NEF_A16622.562N05.434W
Box B
NEF_B016143.728N112.023W
NEF_B026148.573N057.578W
NEF_B036144.251N12.313W
NEF_B046151.322N047.316W
NEF_B056141.637N115.627W
NEF_B066144.859N17.086W
NEF_B076146.564N12.587W
NEF_B086150.693N052.610W
NEF_B096152.391N050.681W
NEF_B106154.081N047.600W
NEF_B116149.452N050.586W
NEF_B126148.159N053.629W
NEF_B136146.275N057.249W
NEF_B146142.370N15.195W
NEF_B156141.350N19.640W
NEF_B166139.564N112.565W
Box C
NEF_C01624.459N08.347E
NEF_C02626.794N028.457E
NEF_C03622.157N018.821E
NEF_C04626.421N040.138E
NEF_C05623.373N02.688E
NEF_C06625.709N014.410E
NEF_C07626.291N021.398E
NEF_C08627.232N035.057E
NEF_C09628.661N043.077E
NEF_C106210.457N047.875E
NEF_C11622.230N06.594E
NEF_C12623.161N013.272E
NEF_C13623.936N019.982E
NEF_C14624.489N026.802E
NEF_C15625.032N033.664E
NEF_C16627.788N046.596E

 

Table 3 WTR Dropframe Station

Stn CodeDegDecMinDegDecMin
Box A
WTR_A001604.519N726.152W
WTR_A002602.628N724.087W
WTR_A003606.359N723.906W
WTR_A004600.736N722.026W
WTR_A005604.467N721.841W
WTR_A006602.575N719.780W
WTR_A007606.306N719.591W
WTR_A008600.682N717.723W
WTR_A009604.413N717.531W
WTR_A010602.519N715.474W
WTR_A011606.250N715.277W
WTR_A012600.625N713.421W
WTR_A013604.356N713.220W
WTR_A014608.086N713.019W
WTR_A0155958.730N711.372W
WTR_A016602.461N711.168W
WTR_A017606.192N710.963W
WTR_A018600.566N79.119W
WTR_A019604.297N78.910W
WTR_A020608.027N78.701W
WTR_A0215958.670N77.074W
WTR_A022602.401N76.862W
WTR_A023606.131N76.649W
WTR_A024600.505N74.817W
WTR_A025604.235N74.601W
WTR_A026607.966N74.383W
WTR_A0275958.608N72.777W
WTR_A028602.338N72.556W
WTR_A029606.069N72.335W
WTR_A030600.441N70.516W
WTR_A031604.171N70.291W
WTR_A0325958.543N658.480W
WTR_A033602.273N658.251W
WTR_A034606.004N658.022W
WTR_A035600.375N656.215W
WTR_A036604.105N655.982W
WTR_A037602.206N653.946W
WTR_A038605.936N653.709W
WTR_A039600.307N651.914W
WTR_A040604.036N651.673W
WTR_A0415958.406N649.886W
WTR_A042602.136N649.642W
WTR_A043600.236N647.614W
WTR_A044603.966N647.365W
WTR_A0455958.335N645.590W
WTR_A046602.064N645.338W
WTR_A0475956.433N643.570W
WTR_A048600.163N643.314W
WTR_A049603.892N643.057W
WTR_A0505958.261N641.295W
WTR_A051601.990N641.034W
WTR_A0525956.358N639.279W
WTR_A053600.087N639.015W
WTR_A0545954.455N637.267W
WTR_A0555958.184N636.999W
WTR_A056601.914N636.731W
WTR_A0575956.280N634.988W
WTR_A058600.010N634.715W
WTR_A0595954.376N632.980W
WTR_A0605958.105N632.704W
WTR_A061601.835N632.428W
WTR_A0625956.201N630.697W
WTR_A0635959.930N630.417W
WTR_A0645954.295N628.693W
WTR_A0655958.024N628.410W
WTR_A066601.753N628.125W
WTR_A0675952.390N626.693W
WTR_A0685956.119N626.406W
WTR_A0695959.847N626.118W
WTR_A0705954.212N624.407W
WTR_A0715957.941N624.116W
WTR_A0725952.305N622.411W
WTR_A0735956.034N622.117W
WTR_A0745959.763N621.820W
WTR_A0755950.398N620.420W
WTR_A0765954.127N620.121W
WTR_A0775957.855N619.822W
WTR_A0785948.490N618.432W
WTR_A0795952.219N618.130W
WTR_A0805955.947N617.827W
WTR_A0815959.676N617.523W
WTR_A0825950.310N616.142W
WTR_A0835954.039N615.836W
WTR_A0845957.767N615.529W
WTR_A0855952.130N613.849W
WTR_A0865955.858N613.538W
WTR_A0875950.220N611.865W
WTR_A0885953.949N611.551W
WTR_A0895952.039N69.568W
WTR_A0905950.128N67.589W
WTR_A0915951.945N65.288W
Box B
WTR_B0015952.515N556.750W
WTR_B0025952.323N557.857W
WTR_B0035951.811N557.503W
Box C
WTR_C0015951.935N554.408W
WTR_C0025951.864N558.711W
WTR_C0035952.608N555.580W
WTR_C0045952.029N555.759W
WTR_C0055952.989N558.700W

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