Identification

Title

1989 - 1989 Centre for Environment, Fisheries & Aquaculture Science (Cefas) English Channel and Bay of Biscay Plankton Survey - RV Corystes 07/89

Abstract

This survey was carried out between June-July 1989 in the English Channel and the Bay of Biscay in order to investigate the distribution and abundance of crab (*Cancer pagurus*) larvae. A fine mesh sampler was also used to determine the distribution of scallop (*Pecten maximus*) larvae and to take additional plankton samples in areas of highest abundance of larvae to estimate haul to haul spatial variability. 319 stations were sampled on the main survey grid. This data consists of the numbers of crab larvae, plus fish eggs from a selected few stations, along with associated positional data and volumes filtered.

Resource type

dataset

Resource locator

Unique resource identifier

code

CEFASf6938ffc-7eb1-4a06-a2f9-fc9f23513479

codeSpace

http://www.cefas.co.uk/

Dataset language

eng

Spatial reference system

authority code

OGP

code identifying the spatial reference system

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

Classification of spatial data and services

Topic category

Keywords

Keyword set

keyword value

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

Geographic location

West bounding longitude

-9

East bounding longitude

3

North bounding latitude

51.25

South bounding latitude

46

Extent

Extent group

authority code

title

reference date

date type

revision

effective date

2010-05-18

code identifying the extent

Temporal reference

Temporal extent

Begin position

1989-06-08

End position

1989-07-05

Dataset reference date

date type

publication

effective date

2019-10-29

Frequency of update

notPlanned

Quality and validity

Lineage

A 53cm High Speed plankton net with a 20cm diameter nose cone and a 270µm mesh net fitted with a Ministry of Agriculture Fisheries and Food (MAFF) Guildline Conductivity Temperature and Depth (CTD) monitoring system was used in order to determine the distribution and abundance of crab (*Cancer pagurus*) larvae. A fine mesh auxilliary sampler with a 20 micron mesh was also used at selected stations to determine the distribution of scallop (*Pecten maximus* ) larvae. Data Storage: The raw data were stored in an Access database. The various data files were stored on the database in a series of tables linked by having the content of certain fields in common. All routine calculations, calibration changes and conversions were carried out in the database. The data tables (but not queries) have now been extracted into comma separated variable files. Plankton data are normally expressed as either number of organisms per m3 or per m2. These are calculated from the volume of water filtered (derived using regression co-efficients calculated for different flowmeters). Number per m3 is obtained by dividing the numbers per sample by the volume filtered, and number per m2 of sea surface is obtained by multiplying the number per m3 by the mean total or sampled depth during a deployment.

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply

Constraint set

Limitations on public access

Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply

Responsible organisations

Metadata on metadata

Metadata point of contact

contact position

Data Manager

organisation name

Centre for Environment, Fisheries & Aquaculture Science

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

telephone number

+44 (0)1502 562244

email address

data.manager@cefas.co.uk

responsible party role

pointOfContact

Metadata date

2019-10-29T10:09:44

Metadata language