Marine_Scotland_FishDAC_1719 eng dataset Scottish Government (Marine Scotland) +44 (0)300 244 4000 marinescotland@gov.scot pointOfContact 2016-05-03 MEDIN Discovery Metadata Version 2.3.7 urn:ogc:def:crs:EPSG::4326 OGP 1513S Mackerel acoustic survey- Scotia cruise 1513S mackerel, acoustic survey, 1513S 2016-04-04 publication Marine_Scotland_FishDAC_1719 Daily folders (5) of Simrad format (.raw) acoustic data. Objectives To estimate mackerel density and abundance. To study distribution of cetaceans and their relationship to mackerel shoals Specific Objectives: Obtain echosounder recordings of mackerel schools and map their distribution Obtain biological samples of mackerel from schools (trawl and rod and line) Calibrate Sv and TS gains on the Simrad EK60 Deploy a camera system with additional sensors into the mackerel schools to observe behaviour Observe marine mammal distribution and activity during daylight hours Obtain towed hydrophone recordings of mammal vocalisation during survey transects. Scottish Government (Marine Scotland) +44 (0)300 244 4000 Mailpoint 11, Area 1B South, Victoria Quay Edinburgh EH6 6QQ United Kingdom marinescotland@gov.scot pointOfContact Scottish Government (Marine Scotland) +44 (0)300 244 4000 Mailpoint 11, Area 1B South, Victoria Quay Edinburgh EH6 6QQ United Kingdom marinescotland@gov.scot custodian Scottish Government (Marine Scotland) +44 (0)300 244 4000 Mailpoint 11, Area 1B South, Victoria Quay Edinburgh EH6 6QQ United Kingdom marinescotland@gov.scot distributor Aberdeen University +44 1224 272 000 King's College Aberdeen AB24 3FX United Kingdom s.piertney@abdn.ac.uk originator Not Planned Marine Environmental Data and Information Network Acoustics Biota composition Underwater photography SeaDataNet Agreed Parameter Groups 2010-10-23 revision Acoustic backscatter in the water column Cetacean abundance Cetacean behaviour Fish abundance in water bodies Fish biomass in water bodies Fish morphology, age and physiology Seabed photography Water column photography BODC Parameter Discovery Vocabulary 2011-03-25 revision Open Government License (http://www.nationalarchives.gov.uk/doc/open-government-licence/) otherRestrictions no limitations to public access 55000.00 eng oceans -3 0 59.5 61 ICES Rectangles 1910-01-01 creation 48E7 ICES Rectangles 1910-01-01 creation 49E7 ICES Rectangles 1910-01-01 creation 48E8 ICES Rectangles 1910-01-01 creation 49E8 ICES Rectangles 1910-01-01 creation 50E8 ICES Rectangles 1910-01-01 creation 48E9 ICES Rectangles 1910-01-01 creation 49E9 ICES Rectangles 1910-01-01 creation 50E9 SeaDataNet vertical extent keywords 2010-01-01 revision The entire body of water between the bed and the atmosphere. 2013-11-07 2013-11-13 https://www.bodc.ac.uk/data/information_and_inventories/cruise_inventory/search/ Reference info #0 Electronic - 6.5GB - Daily folders (5) of Simrad format (.raw) acoustic data. dataset Acoustic data will be collected at four frequencies (18, 38, 120 and 200 kHz) on a 24 hour basis While transecting a towed hydrophone array will be deployed over the stern of the vessel. It will be recovered prior to any fishing operations. Fish shoals seen on the echosounder will be identified using a pelagic trawl (PT160). Trawling operations will be carried out up to twice per day at anytime between 0900 and 2100. The vessels netsonde systems will be required to monitor catch density and position of shoals in the water column during trawling. The same schools will be targeted for rod and line fishing to obtain a comparison between trawled and line caught sampling methods. Biological sampling of all species caught will be carried out as per standard sampling protocol. A vertical CTD dip will be carried out immediately following a pelagic trawl, this will require the vessel to use its DP system to remain on station. Deployment of the fishing rod mounted camera/sensor system will be done either in DP or with vessel drifting depending on the conditions. The ships thermosalinograph will be run continuously to obtain sea surface temperature and salinity throughout the survey area.