Release and recapture data from cod tagged in the North Sea from 1961 to 2015
Summary
Release and recapture data relating to cod tagged and released in the North Sea (ICES Subarea 4). Between 1961 and 2015, a total of 22,573 cod were tagged and released using either conventional marker-ID tags and in the more recent years of the dataset, electronic data storage tags (DSTs), of which 6,703 tags were subsequently returned. For tagged fish that were recaptured as much information as possible was recorded, namely the recapture date and location, length, weight, sex and maturity. Otoliths (ear stones) were removed for age determination purposes and other studies. These data are used to provide information for studies relating to fish behaviour, growth and identification of stock units.
Categories
Keywords
N/A
Use limitation statement
There are no public access constraints to this data. Use of this data is subject to the licence identified.
Licence
Open Government LicenceAttribution statement
See Cefas Data Portal for details – link to dataset below.
Technical information
Update frequency
notPlanned
Lineage
Cod suitable for tagging were caught using either research or commercially chartered fishing vessels. After each fish was tagged with a uniquely numbered conventional marker-ID tag, their length, weight, health state, release date and position were recorded before being released. From 1999 onwards, cod were also tagged using electronic Data Storage Tags (DSTs), which provide additional information that can be used to gain further insight into the fish’s behaviour. Release and recapture data of these tags were also captured to the `Cefas Tagged Fish Database`_. Although these data have been subject to quality assurance, the provided data does include known erroneous data (e.g. recapture position, time at liberty), some of which have been identified and marked as such. .. _`cefas tagged fish database`: http://data.cefas.co.uk/#/View/206
Spatial information
Coordinate reference system
N/A
Geographic extent
- Latitude from: 51 to 62.5
- Longitude from: -5 to 10
Metadata information
Language
English
Metadata identifier
3da70941-92f1-4b5f-89c3-c8014aa8d018
Published by
Centre for Environment, Fisheries & Aquaculture Science
Contact publisher
data.manager@cefas.gov.ukDataset reference dates
Creation date
21 April 2021
Revision date
17 May 2023
Publication date
28 April 2021
Period
- From: 21 July 1961
- To: 13 April 2015
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Data and Supporting Information
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| 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: CSV, ESRI Shapefile. The data can also be accessed via the WFS and WMS protocols. | Open link |