CEFAS9ba41315-7356-4d25-baff-1c4b3d8da0a4
English
dataset
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
pointOfContact
2023-10-31T10:55:12
EPSG Geodetic Parameter Registry
2022-01-07
revision
WGS 84
Irish Sea Plankton Survey - RV Corystes 04/95
2013-12-10
publication
2023-10-31
revision
2013-07-01
creation
CEFAS2565
https://data.cefas.co.uk
A survey was carried out from the 15th Mar-10th Apr 1995 in the Irish Sea and
Cardigan Bay by the Centre for Environment, Fisheries and Aquaculture Science.
As part of the main aims of this survey a grid of plankton stations was
sampled. This data consists of the numbers of fish eggs and larvae, along with
associated positional data and volumes filtered.
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
originator
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
custodian
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
distributor
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
data.manager@cefas.co.uk
owner
notPlanned
Microzooplankton
Phytoplankton
Zooplankton
SeaDataNet P03 parameter discovery vocabulary
2011-03-25
revision
Plankton
Advice
Analysis
Management
Monitoring
GEMET, version 1.0
2008-06-01
publication
Species distribution
GEMET - INSPIRE themes, version 1.0
2008-06-01
publication
Water column
SeaVoX Vertical Co-ordinate Coverages
2010-05-18
revision
Marine Environmental Data and Information Network
MEDIN metadata record availability
2012-01-11
publication
otherRestrictions
noLimitations
otherRestrictions
Public data - no limitations to reuse
1000
English
biota
-7.00
-2.50
52.00
55.00
1995-03-15
1995-04-10
Delimited
Geographic Information System
Unknown
https://data.cefas.co.uk/view/2565
Cefas Data Portal
download
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.
dataset
INSPIRE Data Specification on Species Distribution – Technical Guidelines
2013-12-10
publication
false
See the referenced specification
Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
2010-12-08
publication
true
See the referenced specification
Samples were collected using a 76cm unencased townet.
Sampler deployment:The sampler was deployed in a double oblique tow from the
surface to within 2 m of the seabed. Veering and hauling speeds were manually
adjusted to ensure that each depth band was sampled equally. At shallow
stations, multiple double oblique dives were necessary to enable a sufficient
volume of water to be filtered. A minimum sampler deployment time of 15
minutes was aimed for. On recovery, the net was carefully washed down and the
sample collected from the end bag. Each sample was then fixed using buffered
formaldehyde solution and transported to the participating laboratories for
sorting and identification.Sample analysis:Fish eggs and larvae were picked
out from all samples by eye and, whenever practicable, the whole sample was
sorted. However sub-sampling was at times necessary. Sub-sampling was carried
out using a Folsom splitter. Fish larvae were readily identified unless they
had been badly damaged during collection or were prematurely hatched. For some
groups such as the sandeels (Ammodytidae) and the group of Gadidae commonly
called rocklings, individuals were not identified to the species level. Fish
eggs were initially split into three groups on the basis of the presence or
absence of oil globules. Those containing either a single or many oil globules
could usually be identified to the species level. Eggs with no oil globules
were more difficult to identify. Some of these species such as cod (*Gadus
morhua*), sprat (*Sprattus sprattus*), long rough dab (*Hippoglossoides
platessoides*), dragonet (*Callionymus* spp.) and plaice (*Pleuronectes
platessa*) were identified because of their size or unique features.
Unidentified eggs in this group were recorded as egg diameters.
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.
MEDIN
3.1.1