{"id":9766,"date":"2019-06-20T08:30:51","date_gmt":"2019-06-20T07:30:51","guid":{"rendered":"https:\/\/blogs.gov.scot\/marine-scotland\/?p=9766"},"modified":"2019-06-18T13:21:16","modified_gmt":"2019-06-18T12:21:16","slug":"bowling-for-prey-species","status":"publish","type":"post","link":"https:\/\/blogs.gov.scot\/marine-scotland\/2019\/06\/20\/bowling-for-prey-species\/","title":{"rendered":"BOWLing for Prey Species"},"content":{"rendered":"<h4><strong>MRV Alba na Mara<\/strong><\/h4>\n<p><strong>Survey<\/strong>: 0919A Programme<\/p>\n<p><strong>Duration<\/strong>: 8-12 June 2019<\/p>\n<h4><strong>Equipment: <\/strong><\/h4>\n<ul>\n<li>Pelagic net PT 154;<\/li>\n<li>\u201cBongo\u201d net plankton sampling equipment;<\/li>\n<li>Seabird SBE19 CTD;<\/li>\n<li>Water sampling mini-rosette;<\/li>\n<li>Sandeel dredge;<\/li>\n<li>Day grab and grab table; and<\/li>\n<li>EK 60 sounder.<\/li>\n<\/ul>\n<h4><strong>Location Names:<\/strong><\/h4>\n<ul>\n<li>Beatrice Offshore Wind farm Limited\u00a0 (BOWL);<\/li>\n<li>Moray East Offshore Wind farm (MEOW); and<\/li>\n<li>Moray West Offshore Wind farm (MWOW).<\/li>\n<\/ul>\n<h4><strong>Objectives:<\/strong><\/h4>\n<h4><strong>Primary Objectives:<\/strong><\/h4>\n<ol>\n<li>Study the distribution of prey species (fish schools, zooplankton patches) across the Smith Bank in relation to data available from BOWL post-construction digital aerial surveys and University of Aberdeen Passive Acoustic Monitoring (PAM) surveys of top predators.<\/li>\n<li>Compare the distribution of schooling sandeels in summer with data on their presence in the sediment from the BOWL\/MEOW winter sandeel monitoring<\/li>\n<\/ol>\n<h4><strong>Secondary Objectives:<\/strong><\/h4>\n<ol>\n<li>Collect hydrographic data to further validate the Scottish Shelf Model (SSM) and incorporate its outputs into assessment of drivers of predator distribution.<\/li>\n<\/ol>\n<h4><strong>Primary Objective:<\/strong><\/h4>\n<p>Alba na Mara will conduct acoustic surveys using the EK60 sounder along key transects that are concurrently being surveyed using HiDef digital aerial surveys and PAM deployments.\u00a0 The time period of this survey covers a similar period as the BOWL post-construction digital aerial surveys (May to July 2019), when sandeels are in the water column during daylight to feed.\u00a0 Acoustic surveys will be made within five pre-selected aerial survey transects (see Figure 2) passing between wind farm turbine rows.<\/p>\n<p>Acoustic data will be collected for all available frequencies.\u00a0 Concurrent visual surveys collect data at different levels of the trophic web using a multi-disciplinary approach.<\/p>\n<p>Line-transect surveys will be conducted at an average speed of 8 knots. Two replicates of the line transects will be carried out within each 500m wide aerial survey transect (Figure 2).<\/p>\n<p>Pelagic sampling for sandeels using the PT 154 net will be conducted early on in the day to capture the change of light.\u00a0 A sandeel dredge will be deployed as a back-up should the pelagic net not catch any samples. Due to the light periods relevant to sandeel capture this survey will operate a working timetable of 06:00 to 18:00.<\/p>\n<p>Shooting positions will be chosen along the survey transects but not necessarily in the same orientation as these.\u00a0 The shooting and hauling position of the trawls will be recorded. The trawl duration will be of 30 minutes.<\/p>\n<p>Plankton sampling will be done using the \u201cbongo\u201d net dual sampler using nets of 200 and 68\u00b5m mesh size. Collected samples will be preserved in a number of ways: 70% alcohol, 4% formaldehyde and vital stain neutral red. Positions for these have been planned as stratified random positions along the transect lines, Figure 3 shows these positions.<\/p>\n<h4><strong>Survey Activities During Turbine Piling Activities<\/strong><\/h4>\n<p>The Alba na Mara will survey around any turbine piling activities should these start at the MEOW site. Alba na Mara will collect biological samples at a predetermined safety distance from the piling activities. Daily contact with the MEOW operation team will ensure that the Alba can sample soon after piling events are completed.<\/p>\n<h4><strong>Secondary Objective:<\/strong><\/h4>\n<p>1)\u00a0\u00a0\u00a0 A grid of hydrographic sampling stations will be sampled during the survey to collect data for the SSM. At each station a CTD together with a water sampler will be deployed. The plankton sampling net will also be deployed at these locations. See Figure 3.<\/p>\n<p>CTD profiles will be collected throughout each transect at stratified random positions to provide information on the local sound speed varying with depths, temperature and salinity. Water sampling will be performed at the same time using the mini-rosette in conjunction with the CTD.<\/p>\n<p>Should the CTD not work in conjunction with the mini-rosette reversible bottles will be used for collecting water samples.<\/p>\n<h4><strong>Figure 1: Survey Location and Wind Farm Development Sites<\/strong><\/h4>\n<p><a href=\"https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-1-Survey-location-and-wind-farm-development-sites.jpg\"><img decoding=\"async\" class=\"alignnone size-full wp-image-9814 lazyload\" data-src=\"https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-1-Survey-location-and-wind-farm-development-sites.jpg\" alt=\"Survey location and wind farm development sites\" width=\"429\" height=\"304\" data-srcset=\"https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-1-Survey-location-and-wind-farm-development-sites.jpg 429w, https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-1-Survey-location-and-wind-farm-development-sites-300x213.jpg 300w\" data-sizes=\"(max-width: 429px) 100vw, 429px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 429px; --smush-placeholder-aspect-ratio: 429\/304;\" \/><\/a><\/p>\n<p>The locations of waypoints for start\/end of transects, hydrographic sampling points and map of general area to be studies can be seen in Figure 2 and 3 and the geographic positions of these in tables 1 and 2.<\/p>\n<h4><strong>Figure 2: Proposed Transects for Fisheries Acoustic Surveys<\/strong><\/h4>\n<p><a href=\"https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-2-Proposed-transects-for-fisheries-acoustic-surveys.jpg\"><img decoding=\"async\" class=\"alignnone wp-image-9816 lazyload\" data-src=\"https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-2-Proposed-transects-for-fisheries-acoustic-surveys.jpg\" alt=\"Proposed transects for fisheries acoustic surveys\" width=\"480\" height=\"439\" data-srcset=\"https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-2-Proposed-transects-for-fisheries-acoustic-surveys.jpg 940w, https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-2-Proposed-transects-for-fisheries-acoustic-surveys-300x274.jpg 300w, https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-2-Proposed-transects-for-fisheries-acoustic-surveys-768x702.jpg 768w, https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-2-Proposed-transects-for-fisheries-acoustic-surveys-560x512.jpg 560w, https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-2-Proposed-transects-for-fisheries-acoustic-surveys-460x420.jpg 460w\" data-sizes=\"(max-width: 480px) 100vw, 480px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 480px; --smush-placeholder-aspect-ratio: 480\/439;\" \/><\/a><\/p>\n<h4><strong>Table 1: Proposed Way Points for Fisheries Acoustic Survey Transects<\/strong><\/h4>\n<p><a href=\"https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Table-1-Proposed-way-points-for-fisheries-acoustic-survey-transects.jpg\"><img decoding=\"async\" class=\"alignnone size-full wp-image-9817 lazyload\" data-src=\"https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Table-1-Proposed-way-points-for-fisheries-acoustic-survey-transects.jpg\" alt=\"Proposed way points for fisheries acoustic survey transects\" width=\"638\" height=\"444\" data-srcset=\"https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Table-1-Proposed-way-points-for-fisheries-acoustic-survey-transects.jpg 638w, https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Table-1-Proposed-way-points-for-fisheries-acoustic-survey-transects-300x209.jpg 300w, https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Table-1-Proposed-way-points-for-fisheries-acoustic-survey-transects-604x420.jpg 604w\" data-sizes=\"(max-width: 638px) 100vw, 638px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 638px; --smush-placeholder-aspect-ratio: 638\/444;\" \/><\/a><\/p>\n<h4><strong>Figure 3: Hydrographic and Plankton Sampling Positions<\/strong><\/h4>\n<p><a href=\"https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-3-Hydrographic-and-plankton-sampling-positions.jpg\"><img decoding=\"async\" class=\"alignnone wp-image-9818 lazyload\" data-src=\"https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-3-Hydrographic-and-plankton-sampling-positions.jpg\" alt=\"Hydrographic and plankton sampling positions\" width=\"486\" height=\"344\" data-srcset=\"https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-3-Hydrographic-and-plankton-sampling-positions.jpg 986w, https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-3-Hydrographic-and-plankton-sampling-positions-300x212.jpg 300w, https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-3-Hydrographic-and-plankton-sampling-positions-768x543.jpg 768w, https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-3-Hydrographic-and-plankton-sampling-positions-724x512.jpg 724w, https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Figure-3-Hydrographic-and-plankton-sampling-positions-594x420.jpg 594w\" data-sizes=\"(max-width: 486px) 100vw, 486px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 486px; --smush-placeholder-aspect-ratio: 486\/344;\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<h4><strong>Table 2: Hydrographic and Plankton Sampling Positions<\/strong><\/h4>\n<p><a href=\"https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Table-2-Hydrographic-and-plankton-sampling-positions.jpg\"><img decoding=\"async\" class=\"alignnone size-full wp-image-9819 lazyload\" data-src=\"https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Table-2-Hydrographic-and-plankton-sampling-positions.jpg\" alt=\"Hydrographic and plankton sampling positions\" width=\"486\" height=\"883\" data-srcset=\"https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Table-2-Hydrographic-and-plankton-sampling-positions.jpg 486w, https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Table-2-Hydrographic-and-plankton-sampling-positions-165x300.jpg 165w, https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Table-2-Hydrographic-and-plankton-sampling-positions-282x512.jpg 282w, https:\/\/blogs.gov.scot\/marine-scotland\/wp-content\/uploads\/sites\/23\/2019\/06\/0919A-Table-2-Hydrographic-and-plankton-sampling-positions-231x420.jpg 231w\" data-sizes=\"(max-width: 486px) 100vw, 486px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 486px; --smush-placeholder-aspect-ratio: 486\/883;\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MRV Alba na Mara Survey: 0919A Programme Duration: 8-12 June 2019 Equipment: Pelagic net PT 154; \u201cBongo\u201d net plankton sampling equipment; Seabird SBE19 CTD; Water sampling mini-rosette; Sandeel dredge; Day grab and grab table; and EK 60 sounder. Location Names: Beatrice Offshore Wind farm Limited\u00a0 (BOWL); Moray East Offshore Wind farm (MEOW); and Moray West&#8230;<\/p>\n","protected":false},"author":118,"featured_media":7016,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,14,15,131,20],"tags":[147,203,934,1003,87,1002,1001,99,156,106,212,240,465,161,998,127],"class_list":["post-9766","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fisheries","category-general","category-mss","category-marine-scotland-surveys","category-research-vessel-surveys","tag-alba-na-mara","tag-fisheries","tag-hydrography","tag-meow","tag-monitoring","tag-moray-east-offshore-wind-farm","tag-moray-west-offshore-wind-farm","tag-plankton-sampling","tag-research","tag-sampling","tag-sandeels","tag-science","tag-species","tag-survey","tag-windfarm","tag-zooplankton"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - 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