CEFASea57d9e9-d200-4d1a-a957-48a8002faba8 English dataset Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk pointOfContact 2021-12-01T01:24:26 EPSG Geodetic Parameter Registry 2022-01-07 revision WGS 84 Thames ray tagging and survival 2007/08- Fisheries Science Partnership FSP Thames ray tagging and survival 2015-10-22 publication 2021-12-01 revision 2012-10-24 creation CEFAS631 https://data.cefas.co.uk To examine, primarily through traditional tagging methods, the survival rates of rays of a range of sizes released after capture by small otter trawlers, gillnetters and linefishing vessels. Timing: April - July 2007. Includes length, sex and maturity data, as well as positional and bycatch data. Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk originator Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk custodian Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk distributor Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) data.manager@cefas.co.uk owner Department for Environment, Food and Rural Affairs (DEFRA) defra.helpline@defra.gov.uk owner notPlanned Biota abundance, biomass and diversity Fish SeaDataNet P03 parameter discovery vocabulary 2011-03-25 revision Species distribution GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Water column SeaVoX Vertical Co-ordinate Coverages 2010-05-18 revision Marine Environmental Data and Information Network MEDIN metadata record availability 2012-01-11 publication data.gov.uk MEDIN metadata record availability 2012-01-11 publication otherRestrictions noLimitations otherRestrictions Adherance to the Cefas Data access policy required. Terms and conditions of OGL – Open Government Licence apply. `http://www.nationalarchives.gov.uk/doc/open-government-licence/`_ .. _`http://www.nationalarchives.gov.uk/doc/open-government-licence/`: http://www.nationalarchives.gov.uk/doc/open-government-licence/ English biota 0.50 2.00 51.25 52.00 2007-01-01 2008-01-01 Binary Delimited Unknown https://data.cefas.co.uk/view/631 Cefas Data Portal download The Cefas Data Portal contains metadata records and data sets available to download and connect to in support of our commitment to open science. Data is available in the following formats: Binary download, CSV. dataset INSPIRE Data Specification on Species Distribution – Technical Guidelines 2013-12-10 publication false See the referenced specification Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication true See the referenced specification This Fisheries Science Partnership project was developed to estimate the longer-term survivorship and movements of thornback ray Raja clavata in the southern North Sea, using traditional tagging methods. Thornback ray is the dominant skate species taken in targeted and mixed fisheries in this area, and is taken in various trawl, line and gillnet fisheries. Five inshore vessels were used in the study, with seven trips planned in order to examine the catches and survivorship following capture by small otter trawlers, gillnetters and longline vessels. A variety of skate and ray species is marketed as ‘skate’, and commercial landings data are for all species combined. The lack of species-specific landings data has hampered assessments of the status of individual stocks and species, although species-specific landings are required for the main skate species taken in the North Sea from 2008. Some of the larger-bodied skate species, such as common skate Dipturus batis are now of conservation concern. The main objectives of this study were to (1) examine the species, sex and size composition of skates (Rajidae) taken in inshore fisheries in the southern North Sea, (2) assess the survivorship of commercially caught fish and (3) undertake a tag-and-release programme for thornback ray. Owing to the size of the vessels involved in the fishery and the fishing locations, the utility of examining short-term survival using holding tanks was limited, although such studies have been undertaken on complementary studies in the Bristol Channel. A visual assessment of the health of fish caught under commercial conditions was made on board, with the majority of fish subsequently tagged with a Petersen disc and returned. Given that the trawlers and liners have short tow durations/soak times, most were in a good state of health, and these gear deployments were as used when fishing commercially. Studies with gillnets used 24 h soak times (as opposed to the commercial 30–48 h soak time, for which mortality would likely be very high), with drift trammelnets deployed for the standard 1–3 h. MEDIN 3.1.1