10.14466/CEFASDATAHUB.13
Morris, David
David
Morris
David Morris
Centre for Environment, Fisheries and Aquaculture Science
Cefas Electronic Data Storage-Tag Database
Cefas Laboratory, UK
2016
Dataset
Temperature of the water column
Morris, David
David
Morris
David Morris
Centre for Environment, Fisheries and Aquaculture Science
Andres, Olga
Olga
Andres
Olga Andres
Centre for Environment, Fisheries and Aquaculture Science
Ayers, Richard
Richard
Ayers
Richard Ayers
Centre for Environment, Fisheries and Aquaculture Science
Brown, Annie
Annie
Brown
Annie Brown
Capuzzo, Elisa
Elisa
Capuzzo
Elisa Capuzzo
Centre for Environment, Fisheries and Aquaculture Science
Cooper, Keith
Keith
Cooper
Keith Cooper
Centre for Environment, Fisheries and Aquaculture Science
Dye, Stephen
Stephen
Dye
Stephen Dye
Centre for Environment, Fisheries and Aquaculture Science
Fernand, Liam
Liam
Fernand
Liam Fernand
Centre for Environment, Fisheries and Aquaculture Science
Flatman, Steve
Steve
Flatman
Steve Flatman
Centre for Environment, Fisheries and Aquaculture Science
Greenwood, Naomi
Naomi
Greenwood
Naomi Greenwood
Centre for Environment, Fisheries and Aquaculture Science
Haverson, David
David
Haverson
David Haverson
Centre for Environment, Fisheries and Aquaculture Science
Hull, Tom
Tom
Hull
Tom Hull
Centre for Environment, Fisheries and Aquaculture Science
Hyder, Kieran
Kieran
Hyder
Kieran Hyder
Centre for Environment, Fisheries and Aquaculture Science
Jennings, Simon
Simon
Jennings
Simon Jennings
Centre for Environment, Fisheries and Aquaculture Science
Jolliffe, Ross
Ross
Jolliffe
Ross Jolliffe
Centre for Environment, Fisheries and Aquaculture Science
Metcalfe, Julian
Julian
Metcalfe
Julian Metcalfe
Centre for Environment, Fisheries and Aquaculture Science
Meadows, Bill
Bill
Meadows
Bill Meadows
Centre for Environment, Fisheries and Aquaculture Science
Pearce, David
David
Pearce
David Pearce
Pinnegar, John
John
Pinnegar
John Pinnegar
Centre for Environment, Fisheries and Aquaculture Science
Pitois, Sophie
Sophie
Pitois
Sophie Pitois
Centre for Environment, Fisheries and Aquaculture Science
Righton, David
David
Righton
David Righton
Centre for Environment, Fisheries and Aquaculture Science
Taylor, Natasha
Natasha
Taylor
Natasha Taylor
Centre for Environment, Fisheries and Aquaculture Science
Williams, Oliver
Oliver
Williams
Oliver Williams
Centre for Environment, Fisheries and Aquaculture Science
Wright, Serena
Serena
Wright
Serena Wright
Centre for Environment, Fisheries and Aquaculture Science
1999-03-24
2010-09-18
2016
1
Public data (Crown Copyright) - Open Government terms and conditions apply
This dataset has been extracted as part of an exercise to assemble "all" Cefas Temperature Data and publish it in a Data paper. It is one of 17 Cefas data sources assembled. Electronic tags that record temperature and depth were attached to, or implanted into, cod caught in the southern North Sea between 1999 and 2009 (for methods see Neat et al., 2014). Data from tags that were returned from recaptured cod were downloaded and the depth time series was used to estimate daily geographic location. Geolocation was done by matching the tidal and maximum depth data to known dates and locations as per the method described in Pedersen et al. (2007). Temperature data from each tag were binned into 10m depth intervals, and then averaged. The maximum depth in a bin was recorded and is used in the data provided. Temperature at the seabed is assumed to be the average of the temperatures sampled in the deepest 10m depth bin. Cod were at liberty to move at will, so the geographic and vertical sampling is not regularised to a grid or vertical stratification. The number of temperature records collected by cod on each day is also variable, since this depends on the number of cod remaining at liberty after release (i.e. those that were not recaptured by fishermen). The data describes the temperature data sampled by a total of 90 cod, and comprises temperature data collected on a total of 10,446 days. Tags recorded data at a minimum interval of 72 times per day continuously throughout the time at liberty (11-541 days). Data are available for 9,600 days during the period 1999 to 2010. The tags attached to, or implanted in, cod were of several types: Lotek 1200, 1400 and 2400, the Star-Oddi Centi and Milli, and the Cefas G5. All tags were calibrated by the manufacturer before deployment, and typically measure temperature to a precision of 0.03°C and an accuracy of at least 0.2°C. Temperature and depth are reported to 1dp. Temperature data collected by the tags are assumed to be a precise measure of seawater temperature based on the calibration tests performed by tag manufacturers before the tags are deployed. There is no independent measure of temperature against which to assess sensor performance while the tags are deployed at sea. Unusual temperatures associated with sensor failure or data corruption were excluded from the dataset, as were data from the day of release or recapture, when spurious surface or air temperatures might be recorded to the tag memory. Daily temperature averages had standard deviations ranging from 0 to 6.8, with 2/3 <0.1. The high variation reflects the behaviour of the particular cod on the particular day.