Identification

Title

International Bottom Trawl Survey Jellyfish Data - North Sea - 2012 to 2023

Abstract

The wet weight in grams of gelatinous zooplankton (jellyfish) caught at each station during International Bottom Trawl Surveys in the North Sea from 2012 to 2023. Also included are associated station data which include datetime, location, depths, swept volume and information on gear deployment. Any blank values indicate the value was not recorded.

Resource type

dataset

Resource locator

https://data.cefas.co.uk/view/19932

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: Binary download, CSV, ESRI Shapefile. The data can also be accessed via the WFS and WMS protocols.

function: download

Unique resource identifier

code

CEFAS19932

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

publication

effective date

2008-06-01

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

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

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

-2.00

East bounding longitude

9.00

North bounding latitude

58.00

South bounding latitude

51.00

Temporal reference

Temporal extent

Begin position

2012-08-07

End position

2023-08-31

Dataset reference date

date type

publication

effective date

2019-09-20

date type

revision

effective date

2024-07-12

date type

creation

effective date

2019-07-11

Frequency of update

notPlanned

Quality and validity

Lineage

Jellyfish data was collected using standard GOV fishing gear deployed from Cefas RV Endeavour, to carry out the International Bottom Trawl Survey (IBTS) since 2012. Cefas is responsible for the Quarter 3 (Q3) survey which is recurring every August and covers the North Sea. The IBTS is a fishery dependent multi-species bottom trawl survey coordinated within ICES areas. These surveys aim to provide ICES assessment and science groups with consistent and standardized data for examining spatial and temporal changes in (a) the distribution and relative abundance of fish and fish assemblages; and (b) of the biological parameters of commercial fish species for stock assessment purposes. Full details of protocols are described in the official manual: `https://www.ices.dk/sites/pub/Publication%20Reports/ICES%20Survey%20Protocols%20(SISP)/SISP1-IBTSVIII.pdf`_ Following each fishing trawl described in the protocol, gelatinous zooplankton (commonly known as jellyfish) collected in the net were processed similarly to the fish. The rationale for the sampling of jellyfish is explained in Aubert et al. 2018 (`https://doi.org/10.1016/j.marpol.2017.12.010`_), which also contains the official standard operating protocol to process the gelatinous zooplankton. Gelatinous zooplankton were separated according to species. The bulk of each species was weighted with individuals also weighted and measured. Unrecognisable specimen were categorised into a "non-identified" category. .. _`https://www.ices.dk/sites/pub/publication%20reports/ices%20survey%20protocols%20(sisp)/sisp1-ibtsviii.pdf`: https://www.ices.dk/sites/pub/Publication%20Reports/ICES%20Survey%20Protocols%20(SISP)/SISP1-IBTSVIII.pdf .. _`https://doi.org/10.1016/j.marpol.2017.12.010`: https://doi.org/10.1016/j.marpol.2017.12.010

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

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

email address

data.manager@cefas.co.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

2024-07-12T12:53:08

Metadata language