Marine_Scotland_FishDAC_1717 eng dataset Scottish Government (Marine Scotland) +44 (0)300 244 4000 marinescotland@gov.scot pointOfContact 2019-10-22 MEDIN Discovery Metadata Version 2.3.7 urn:ogc:def:crs:EPSG::4326 OGP CLYDAS - 1615A - Clyde Herring Acoustic Survey 2015 - Clyde - Alba Na Mara Clyde, Herring Acoustic Survey, Alba, Alba Na Mara 2016-04-04 publication Marine_Scotland_FishDAC_1717 Daily folders (9) of Simrad format (.raw) acoustic data. 9 Echoview format (EV) format analysis files. Excel biological data for 9 pelagic hauls. Continual Thermosalinograph data. Continual AGDS data. Cetacean recording and sighting data is held by Aberdeen University. Objectives: To conduct an acoustic survey designed to survey both the open and enclosed areas of the Clyde to ultimately provide an estimate of the abundance and distribution of herring and sprat To obtain samples of herring and sprat for biological analysis, including age, length, weight, sex, maturity and ichthyophonus infection. All other species caught will be measured for length and weight to establish a length weight relationship. Data will be gathered on cetaceans using a towed passive acoustic array. 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 Marine Scotland Science 375 Victoria Road Aberdeen AB11 9DB United Kingdom marinescotland@gov.scot originator Not Planned Marine Environmental Data and Information Network Cetacean abundance Cetacean behaviour Fish abundance in water bodies Fish biomass in water bodies Fish morphology, age and physiology SeaDataNet Parameter Discovery Vocabulary 2018-12-12 revision Acoustics Biota composition SeaDataNet Agreed Parameter Groups 2017-05-03 revision Open Government License (http://www.nationalarchives.gov.uk/doc/open-government-licence/) otherRestrictions no limitations to public access 55000.00 eng oceans -6 -4 55 56.5 ICES Rectangles 1910-01-01 creation 39E4 ICES Rectangles 1910-01-01 creation 40E4 ICES Rectangles 1910-01-01 creation 41E4 ICES Rectangles 1910-01-01 creation 39E5 ICES Rectangles 1910-01-01 creation 40E5 ICES Rectangles 1910-01-01 creation 41E5 SeaDataNet vertical extent keywords 2010-01-01 revision The entire body of water between the bed and the atmosphere. 2015-10-24 2015-11-07 https://www.bodc.ac.uk/data/information_and_inventories/cruise_inventory/search/ Reference info #0 Electronic - 7GB - Daily folders (9) of Simrad format (.raw) acoustic data. 9 Echoview format (EV) format analysis files. Excel biological data for 9 pelagic hauls. Continual Thermosalinograph data. Continual AGDS data. Cetacean recording and sighting data is held by Aberdeen University, Database - - Marine Scotland FSS database dataset Procedure The survey will be carried out within an area bounded by approx. 55°N to 56°N and 04° 40’ W to 05° 40’ W. Echo-integration will be carried out at 38, 120 and 200 kHz. Data gathered in the hours of darkness will not be used for stock assessment. Trawling operations will be carried out as and when marks are identified. Otoliths will be collected from a sub-sample of the herring and sprat to determine age. The maturity state and. presence of Icthyophonus infection will also be recorded. The track will be similar to that carried out on previous surveys (Figure 1). A passive acoustic array will be towed during the survey, to detect the presence of cetaceans throughout the survey area. Thermosalinograph data will be gathered throughout the survey. The survey will involve following a pre-set survey pattern, at a steaming speed of eight knots.