Marine_Scotland_FishDAC_1736 eng dataset Scottish Government (Marine Scotland) +44 (0)300 244 4000 marinescotland@gov.scot pointOfContact 2016-05-05 MEDIN Discovery Metadata Version 2.3.7 urn:ogc:def:crs:EPSG::4326 OGP 0201C- West coast lochs- small pelagics acoustic survey-Clupea cruise 0201C Herring, sprat,west coast, lochs,acoustic survey, Clupea 2016-05-04 publication Marine_Scotland_FishDAC_1736 Daily folders (10) of Simrad format (.ek5 format). CTD data for 24 vertical dips. Continual AGDS data for 38 and 120Khz frequencies. Objectives: To sample fish and benthos in designated sealochs using the BT154 trawl and 2.8m beam trawl. To carry out detailed acoustic surveys in lochs using Reson 6012 multibeam and Roxann. To carry out grab sampling for benthic organisms and ground truthing Roxann. To carry out plankton and CTD sampling at selected stations within the lochs. 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 Water column temperature and salinity Zooplankton 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 -6 -5 57 57.5 ICES Rectangles 1910-01-01 creation 43E4 SeaDataNet vertical extent keywords 2010-01-01 revision The entire body of water between the bed and the atmosphere. 2001-01-26 2001-02-08 https://www.bodc.ac.uk/data/information_and_inventories/cruise_inventory/search/ Reference info #0 Electronic - 1GB - Daily folders (10) of Simrad format (.ek5 format). CTD data for 24 vertical dips. Continual AGDS data for 38 and 120Khz frequencies. dataset Where possible hauls were of 30 minutes duration. In total seven Pelagic, nine demersal and eight beamtrawlswere carried out. Fortygrab stations were undertaken for sediment analysis andground truthing RoxAnn, 24 CTD stations and seven plankton stations were also sampled. The thermosal inograph was run continuosly throughout the working day. The size range of the most commonly occurring species (herring sprat, whiting, pout and poor cod) are shown for each loch in graphs 1-5. Euphausids were also present in large concentrations, primarily associated with sprat in 60-80 m depth. Haddock were caught in significant numbers in only one haul in Loch Hourn, ranging in size from 14-22 cm, and averaging 18 cm. A detailed species list for each loch is shown in Tables 1 and 2. Samples of herring were retained for DNA analysis. Herring were also examined for sex, maturity and lcthyophonus infection. Female herring accounted for 45% ofthe catch. All herring were stage 1 maturity and no lcthyophonus was found. Stomach samples from herring, whiting and saithe were taken and preserved for analysis. It is interesting to note that saithe captured near a fish farm contained only fish pellets in their stomachs. All hauls were sampled according to standing instructions and otiliths taken where necessary. Gear The PT154 net was used very successfully as both a pelagic trawl and a demersal trawl capable of fishing for Nephrops. The net was modified by replacing the two wing weights with a fully rubbered chainground gear of equivalent weight. The footrope was attached to this additional ground gear by adjustable strops every metre. Evenwhen fished hard on the seabed the gear remained stable, successfully capturing Nephrops norvegicus down to 12 mm carapace length and Calocaris macandreae . Creels in the sealochs are still a major problem when trawling, however before the trip began every effort was made to contact as many fishermen as possible who creeled in the lochs prior to commencingwork. This enabled trawling to be conducted in areas that would otherwise have been avoided due to the risk of creel damage. Gaining a knowledge of the shooting patterns employed bythe fishermen made asignificant difference to the success ofthe tripand this type of cooperation should be encouraged.