Identification

Title

2015 - 2018 Marine Biological Association of the United Kingdom (MBA) Western English Channel standard haul demersal fish survey data

Abstract

Time series data of demersal fish populations in the Western English Channel sampled using a large otter trawl (15m headline) by the Marine Biological Association of the United Kingdom from 2015-2018. This data set contains vertebrate data from 108 trawls. For each trawl, the entire catch was identified to species level. This dataset contains abundance, length, weight and disk width (if applicable) measurements. This dataset contains consistent sex data for elasmobranchs. Invertebrate abundance data was also collected on each survey and is available on request to MBASepia@mba.ac.uk. These data include high confidence cephalopod, scallop and large crab abundance as well as counts of other invertebrates including other crustaceans and echinoderms.

Resource type

dataset

Resource locator

https://doi.org/10.17031/1802

description: A link to the web service or dataset

http://www.dassh.ac.uk/

name: DASSH homepage - general website

description: http://www.dassh.ac.uk

Unique resource identifier

code

MBA_StandardHaul_DT0001

codeSpace

http://www.dassh.ac.uk/

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

urn:ogc:def:crs:EPSG::4326

Classification of spatial data and services

Topic category

oceans

biota

Keywords

Keyword set

keyword value

Keyword set

keyword value

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

revision

effective date

2008-01-06

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

revision

effective date

2009-11-16

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

creation

effective date

2011-07-06

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

creation

effective date

2012-02-14

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

creation

effective date

2012-03-16

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

creation

effective date

2012-04-28

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

creation

effective date

2006-08-31

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

creation

effective date

2017-05-12

Geographic location

West bounding longitude

-4.3000

East bounding longitude

-3.8000

North bounding latitude

50.2000

South bounding latitude

50.1800

Extent

Extent group

authority code

title

reference date

date type

creation

effective date

2009-06-18

code identifying the extent

Western Channel and Celtic Sea

Extent group

authority code

title

reference date

date type

creation

effective date

2009-05-01

code identifying the extent

29E5

Extent group

authority code

title

reference date

date type

creation

effective date

2009-05-01

code identifying the extent

29E6

Extent group

authority code

title

reference date

date type

revision

effective date

2010-01-01

code identifying the extent

water column

Vertical extent information

Minimum value

-20.0000

Maximum value

-80.0000

Coordinate reference system

authority code

code identifying the coordinate reference system

urn:ogc:def:crs:EPSG::5861

Temporal reference

Temporal extent

Begin position

2015-01-21

End position

2018-09-13

Dataset reference date

date type

publication

effective date

2021-12-23

date type

creation

effective date

2018-09-13

date type

revision

effective date

2021-05-03

Frequency of update

unknown

Quality and validity

Lineage

This 4-year dataset belongs to a parent data-series of standard haul demersal fish survey time series data titled '1913 - Ongoing Marine Biological Association of the United Kingdom (MBA) Western English Channel standard haul demersal fish time series survey data' with resource ID 'MBA_StandardHaul_SE01'. Seven research vessels have been used over the course of the time series with comparable gear i.e. an ~15m headline otter trawl with a small mesh cod-end or a cod end liner of mesh size 20mm. There is high confidence in this dataset. Data is subject to quality checking of 10% of digitised data against paper records. Since 2018, taxonomic identification has been validated through the NMBAQC scheme. If there is any question of confidence of taxonomic identification of a species then a more general taxonomic level is used to describe these specimens (typically genus). Data of lower confidence levels, including invertebrate records and sex data for non-elasmobranchs, has been excluded from this data set but can be requested via MBASepia@mba.ac.uk, these data include high confidence cephalopod, scallop and large crab abundance as well as counts of other invertebrates including other crustaceans and echinoderms. Record Types (see SpeciesNotes in taxon form) describe the measurements that were carried out for the sample and/or individuals: Individuals - (Each individual caught has been weighed, measured and counted), Abundance / Weight - (All individuals landed have been weighed and counted as a whole, not individually), Sub-sample (Abundance) - (Measured total weight off all landed individuals, and from this estimated total abundance) and Sub-sample (Weight) - (Counted the total abundance of all landed individuals and from this estimated the total weight). Please note that where an unknown weight occurred, the database auto-filled the blank entry with a value of 1. Therefore if weights are from a record types of 'Abundance/Weight' and 'Subsample Abundance' with values of 1, these are assumed to be an auto-filled value and have been changed to unknown within this data set. Where an 'Individual Weight' or a Wet weight biomass which is Record Type 'individuals' and abundance of 1, contain a value of 1, this is assumed to be correct and has not been changed in this data set, but should be treated as correct under the data user's discretion. If any sensitive species or biotope records are present within this dataset, they will have been removed. If you wish to request access to sensitive species records, please contact the metadata contact. The UK Sensitive Species list has been agreed by UK statutory bodies and relevant experts. It can be viewed here https://docs.nbnatlas.org/sensitive-species-list/. Please note sensitive species lists can vary across the UK.

Conformity

Conformity report

specification

title

reference date

date type

publication

effective date

2011-02-02

degree

true

explanation

See the referenced specification

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Open access; CC-BY (https://creativecommons.org/licenses/by/4.0/)

Constraint set

Limitations on public access

open access; Unpublished data (such as that excluded data mentioned in the lineage field) can be requested via MBASepia@mba.ac.uk

Responsible organisations

Responsible party

contact position

Sea-going team

organisation name

Marine Biological Association of the United Kingdom

email address

MBASepia@mba.ac.uk

responsible party role

originator

Responsible party

contact position

Research Vessel Manager

organisation name

Marine Biological Association of the United Kingdom

email address

racbri@mba.ac.uk

responsible party role

custodian

Metadata on metadata

Metadata point of contact

contact position

Sea-going team

organisation name

Marine Biological Association of the United Kingdom

email address

MBASepia@mba.ac.uk

responsible party role

pointOfContact

Metadata date

2022-04-11

Metadata language