Marine_Scotland_FishDAC_1266 eng dataset Marine Scotland +44 (0)1224 876 544 enquiries@marlab.ac.uk pointOfContact 2014-10-24 MEDIN Discovery Metadata Version 2.3.7 WGS84 OGP FishDAC - Deepwater Trawl Survey Data - Marine Scotland 1996-Present Deepwater trawl Surveys 1900-01-01 publication Marine_Scotland_FishDAC_1266 Exploratory deepwater trawl survey. Gear testing and survey development. Marine Scotland +44 (0)1224 876 544 Marine Scotland Science, Marine Laboratory, 375 Vcitoria Road Aberdeen AB11 9DB United Kingdom enquiries@marlab.ac.uk pointOfContact Marine Scotland +44 (0)1224 876 544 Marine Scotland Science, Marine Laboratory, 375 Vcitoria Road Aberdeen AB11 9DB United Kingdom enquiries@marlab.ac.uk originator Drewery, Jim Marine Scotland +44 (0)1224 876 544 Marine Scotland Science, Marine Laboratory, 375 Vcitoria Road Aberdeen AB11 9DB United Kingdom enquiries@marlab.ac.uk custodian Burns, Finlay Marine Scotland +44 (0)1224 876 544 Marine Scotland Science, Marine Laboratory, 375 Vcitoria Road Aberdeen AB11 9DB United Kingdom enquiries@marlab.ac.uk custodian Rasmussen, Jens Marine Scotland +44 (0)1224 876 544 Marine Scotland Science, Marine Laboratory, 375 Vcitoria Road Aberdeen AB11 9DB United Kingdom enquiries@marlab.ac.uk custodian Neat, Francis Marine Scotland +44 (0)1224 876 544 Marine Scotland Science, Marine Laboratory, 375 Vcitoria Road Aberdeen AB11 9DB United Kingdom enquiries@marlab.ac.uk custodian unknown Marine Environmental Data and Information Network Fish abundance in water bodies Fish morphology, age and physiology Fish reproduction Fish taxonomy-related counts BODC Parameter Discovery Vocabulary 2011-03-25 revision Open Government License (http://www.nationalarchives.gov.uk/doc/open-government-licence/) license 55000.00 eng biota environment oceans -10 -3 57 61 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 45E1 ICES Rectangles 1910-01-01 creation 46E1 ICES Rectangles 1910-01-01 creation 46E2 ICES Rectangles 1910-01-01 creation 47E2 ICES Rectangles 1910-01-01 creation 47E3 ICES Rectangles 1910-01-01 creation 48E3 ICES Rectangles 1910-01-01 creation 48E4 ICES Rectangles 1910-01-01 creation 49E4 ICES Rectangles 1910-01-01 creation 49E5 ICES Rectangles 1910-01-01 creation 50E6 SeaDataNet vertical extent keywords 2010-01-01 revision The water column zone of total darkness extending down to the abyssal sea floor. Typically between depths of approximately 4000 metres and 6000 metres. SeaDataNet vertical extent keywords 2010-01-01 revision The water column zone in which for clear water there is adequate light for photosynthesis. Typically from the surface down to a depth of approximately 200 metres. SeaDataNet vertical extent keywords 2010-01-01 revision The water column zone penetrated by light, but in insufficient quantities for photosynthesis. Typically between depths of approximately 200 metres and 1000 metres. 1996-01-01 2016-11-07 https://sites.google.com/site/mssmonitoring/home/coastal-sites/deepwater-trawl-surveys Reference info #0 download Database - 446 Trawl stations - Access Database Table - Providing positions, times, and deployment informaiton, Database - 11914 length-weight measurements - Access Database table - Length and weight for species, Database - 105930 length frequency recordings - Access database table - Number of fish by survey, trawl, species, sex, and length dataset The survey covers a core area of the continental slope from between 55 to 59 ° N with the slope stratified by depth at 500, 1000, 1500 and 1800 m. The reason for depth stratification is related to the strong bathymetric patterns in species distributions and abundance. Additional stations have also been trawled at intermediate depth strata, most notably at 750 m. The survey takes place in September and has a typical duration of 14 days that allows around 30 hauls to be completed. From 1998 through 2004 the survey was biannual but, from 2005-2009, the survey was annual and expanded its geographic scope to other areas, notably Rosemary bank. No survey was undertaken in 2010, but surveys were resumed in 2011. The main objective of the MSS deepwater survey is to sample the populations of fish on the slope to enable the generation of indices of abundance, size and diversity which can be compared over time and space. For each haul, all species are identified, a total weight taken and sample measured to obtain length-frequency data. Temperature at depth and net geometry parameters are recorded via sensors attached to the net. Secondary objectives of the survey include identification and cataloguing of the mega-benthos and biological sampling, e.g. for genetics and otolith studies which is usually for specific research projects. In 2008 and 2009 a series of gear trials were completed for quality assurance and estimation of gear parameters and catch efficiency. Nearly 200 species have been recorded and the data have been used in publications on patterns of abundance and biodiversity of deepwater fishes.