Identification

Title

Reconstruction of North Sea trawling effort 1985-2015

Abstract

Spatial distribution of total international otter and beam trawling fishing effort, for all ICES rectangles (0.5 degree latitude by 1 degree longitude) of the North Sea, covering a 31-year time span from 1985 to 2015. The dataset was largely reconstructed using compiled effort data from 7 fishing effort time-series and completed by estimations of missing data. Lat and Long coordinates in the data represent the centre of each ICES rectangle.

Resource type

dataset

Resource locator

https://data.cefas.co.uk/view/19722

name: Cefas Data Portal

description: 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.

function: download

Unique resource identifier

code

CEFAS19722

codeSpace

https://data.cefas.co.uk

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

biota

Keywords

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

revision

effective date

2011-03-25

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

revision

effective date

2010-05-18

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2012-01-11

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2012-01-11

Geographic location

West bounding longitude

-2.50

East bounding longitude

9.00

North bounding latitude

58.00

South bounding latitude

51.00

Temporal reference

Temporal extent

Begin position

1985-01-01

End position

2015-12-31

Dataset reference date

date type

publication

effective date

2019-03-21

date type

revision

effective date

2024-07-12

date type

creation

effective date

2019-03-19

Frequency of update

notPlanned

Quality and validity

Lineage

For the 31-year period from 1985 to 2015, we collated or estimated data on total (demersal) otter and beam trawling effort per year for the North Sea, defined as ICES Sub-area IV. Specifically, the effort was quantified as number of hours fishing in a year per ICES rectangle. For each year we compiled data on trawling effort by vessels landing in Belgium, Denmark, England, France, Germany, the Netherlands, Norway, Scotland and Sweden, which are the most significant contributors to trawling effort in the region. Where data for a particular country and year was missing it was estimated, based on the spatial distribution of trawling effort by that same country in other periods, and on the average percentage contribution of the trawling effort by that country to the total. For each year and ICES rectangle the dataset specifies "Compiled" and "Estimated" effort, and additionally provides a "Reconstructed" effort which is the sum of the two. Sources for compiled effort data include the STECF (Scientific, Technical and Economic Committee for Fisheries), the MAFCONS Project (Managing Fisheries to Conserve Groundfish and Benthic Invertebrate Species Diversity), datasets from scientific publications, and national databases for England, Scotland and Denmark. Following feedback on manuscript “Couce, E., Schratzberger, M., and Engelhard, G. H.: Reconstructing three decades of total international trawling effort in the North Sea, Earth Syst. Sci. Data Discuss, `https://doi.org/10.5194/essd-2019-90`_, in review, 2019”, the dataset has been updated to include an estimation of errors for the reconstructed total trawling. Additionally the method for estimating missing data has been refined, leading to small variations throughout the period, and beam trawling data for the period 1997-2002 has suffered significant changes, as German trawling data is now estimated due to shrimp trawling activity being missing in the MAFCONS dataset for Germany that was used in the previous version. .. _`https://doi.org/10.5194/essd-2019-90`: https://doi.org/10.5194/essd-2019-90

Conformity

Conformity report

specification

title

reference date

date type

publication

effective date

2013-12-10

degree

false

explanation

See the referenced specification

Conformity report

specification

title

reference date

date type

publication

effective date

2010-12-08

degree

true

explanation

See the referenced specification

Data format

name of format

Unknown

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

Responsible organisations

Responsible party

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

email address

data.manager@cefas.co.uk

responsible party role

originator

Responsible party

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

email address

data.manager@cefas.co.uk

responsible party role

custodian

Responsible party

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

email address

data.manager@cefas.co.uk

responsible party role

distributor

Responsible party

organisation name

Department for Environment, Food and Rural Affairs (DEFRA)

email address

defra.helpline@defra.gov.uk

responsible party role

owner

Metadata on metadata

Metadata point of contact

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

email address

data.manager@cefas.co.uk

responsible party role

pointOfContact

Metadata date

2024-07-12T11:04:19

Metadata language