Marine_Scotland_FishDAC_1729 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 1006H HERAS West coast herring acoustic survey. MFV Enterprise 1006H, west coast herring, acoustic survey Enterprise 2016-04-08 publication Marine_Scotland_FishDAC_1729 Daily folders (17) of Simrad format (.raw) acoustic data. 17 Echoview format (EV) format analysis files. Excel biological data for 33 pelagic hauls. Objectives 1. To conduct an acoustic survey to estimate the abundance and distribution of herring in the north western North Sea and west of Scotland (ICES area VIa(N) as part of the ICES International North Sea Herring Acoustic Survey. 2. To obtain samples of herring for biological analysis, including age, length, weight, sex, maturity and ichthyophonus infection. 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 Scottish Government (Marine Scotland) +44 (0)300 244 4000 Mailpoint 11, Area 1B South, Victoria Quay Edinburgh EH6 6QQ United Kingdom marinescotland@gov.scot originator Not Planned Marine Environmental Data and Information Network Acoustics Biota composition Fish SeaDataNet Agreed Parameter Groups 2010-10-23 revision Acoustic backscatter in the water column Fish abundance in water bodies Fish biomass in water bodies Fish morphology, age and physiology 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 -10 -4 55.5 60 ICES Rectangles 1910-01-01 creation 40E0 ICES Rectangles 1910-01-01 creation 41E0 ICES Rectangles 1910-01-01 creation 42E0 ICES Rectangles 1910-01-01 creation 43E0 ICES Rectangles 1910-01-01 creation 44E0 ICES Rectangles 1910-01-01 creation 45E0 ICES Rectangles 1910-01-01 creation 40E1 ICES Rectangles 1910-01-01 creation 41E1 ICES Rectangles 1910-01-01 creation 42E1 ICES Rectangles 1910-01-01 creation 43E1 ICES Rectangles 1910-01-01 creation 44E1 ICES Rectangles 1910-01-01 creation 45E1 ICES Rectangles 1910-01-01 creation 46E1 ICES Rectangles 1910-01-01 creation 40E2 ICES Rectangles 1910-01-01 creation 41E2 ICES Rectangles 1910-01-01 creation 42E2 ICES Rectangles 1910-01-01 creation 43E2 ICES Rectangles 1910-01-01 creation 44E2 ICES Rectangles 1910-01-01 creation 45E2 ICES Rectangles 1910-01-01 creation 46E2 ICES Rectangles 1910-01-01 creation 41E3 ICES Rectangles 1910-01-01 creation 42E3 ICES Rectangles 1910-01-01 creation 43E3 ICES Rectangles 1910-01-01 creation 44E3 ICES Rectangles 1910-01-01 creation 45E3 ICES Rectangles 1910-01-01 creation 46E3 ICES Rectangles 1910-01-01 creation 47E3 ICES Rectangles 1910-01-01 creation 44E4 ICES Rectangles 1910-01-01 creation 45E4 ICES Rectangles 1910-01-01 creation 46E4 ICES Rectangles 1910-01-01 creation 47E4 ICES Rectangles 1910-01-01 creation 46E5 ICES Rectangles 1910-01-01 creation 47E5 ICES Rectangles 1910-01-01 creation 48E5 SeaDataNet vertical extent keywords 2010-01-01 revision The entire body of water between the bed and the atmosphere. 2006-07-03 2006-07-20 https://www.bodc.ac.uk/data/information_and_inventories/cruise_inventory/search/ Reference info #0 Electronic - 19.6GB - Daily folders (17) of Simrad format (.raw) acoustic data. 17 Echoview format (EV) format analysis files. Excel biological data for 33 pelagic hauls. dataset The survey was carried out using a Simrad EK60 38 kHz sounder echo-integrator Further data analysis was carried out using SonarData Echoview and Marine Laboratory Analysis systems. Data from the echo integrator were summed over quarter hour periods (2.5 n.mi. at 10 knots). The survey was generally restricted to hours of daylight between 0300h and 2300h UTC. A total of 2020 nautical miles of track were recorded. Echo integrator data were collected from 10 metres below the surface (transducer at 5.5 m depth) to 0.5 m above the seabed. Data were processed on a daily basis, then archived as Echoview files (*.raw,*.evi) and stored on DVD and external hard drive. Biological data - fishing trawls 33 trawl hauls were carried out opportunistically during the survey on the denser echo traces. All trawls were carried out using a PT160 pelagic trawl with a 20 mm cod end liner. A scanning netsonde was mounted on the headline. Each haul was sampled for length, age, maturity and weight of individual herring. Up to 686 fish were measured at 0.5 cm intervals from each haul. Otoliths were collected with 1 per 0.5 cm class below 23 cm, 3 per 0.5 cm class from 23 to 27 cm and 10 per 0.5 cm class for 27.5 cm and above. Fish weights were collected at sea for all fish aged. An eight stage maturity scale was used. Immature fish were defined as stages 1 & 2.