29c132ff-d2e3-49a7-990a-128e5b4ca657
English
dataset
Data Officer
Northwestern Inshore Fisheries and Conservation Authority
science@nw-ifca.gov.uk
pointOfContact
2019-08-22
MEDIN Discovery metadata standard
2.3.8
urn:ogc:def:crs:EPSG::4978
1998 - 2009 North Western Inshore Fisheries and Conservation Authority (NWIFCA) North Cumbria Mussel Surveys
2013-04-09
publication
NWIFCA_MUS_CUM_98_09
http://www.nw-ifca.gov.uk
Mussel beds are common along the Cumbrian coast, where they form on suitable hard substrate. In the Inner Solway these inter tidal beds are large enough to support a commercial fishery. However, the beds are unstable and very greatly from year to year. For 12 years Cumbria Sea Fisheries Committee commissioned yearly surveys of these beds to estimate their size and the amount of size mussel available to a fishery. This information was then used to inform management decisions.
Dr Jane Lancaster
Natural Power Consultants
Principal Offshore Ecologist
sayhello@naturalpower.com
originator
Data Officer
Northwestern Inshore Fisheries and Conservation Authority
science@nw-ifca.gov.uk
custodian
notPlanned
Delimited
Documents
Geographic Information System
Marine Environmental Data and Information Network
NDGO0005
Habitats and biotopes
Sea regions
Species distribution
GEMET - INSPIRE themes, version 1.0
2008-01-06
revision
Zoobenthos taxonomy-related wet weight biomass per unit area of the bed
Fauna abundance per unit area of the bed
Zoobenthos taxonomy-related abundance per unit area of the littoral zone
Shellfish abundance and biomass in water bodies
Fishery characterisation
Shellfish morphology, age and physiology
Habitat extent
SeaDataNet P021 parameter discovery vocabulary
2009-11-16
revision
Data is freely available for research or commercial use providing that the originators are acknowledged in any publications produced. A charge may be applied to cover costs of compiling and sending data.
otherRestrictions
No restrictions to public access
English
biota
oceans
biota
Charting Progress 2 Sea Areas
2009-06-18
creation
Irish Sea
ICES Rectangles
2009-05-01
creation
38E6
-3.4669
-3.3982
54.8015
54.8675
-3.3926
-3.3921
54.7831
54.7834
1998-08-09
2009-07-25
Data Officer
Northwestern Inshore Fisheries and Conservation Authority
science@nw-ifca.gov.uk
distributor
dataset
Surveys took place yearly on beds with significant amounts of mussels present. These surveys were undertaken during the summer months at low water on a spring tide. Each bed was mapped using a GPS in order to to calculate the total area of the bed. Coverage of mussels on the bed was estimated using the "zig zag" technique where the bed is traversed in a zig zag pattern and the presence/absence of mussels recorded under each footstep.
Samples of mussels were also taken from the bed. These samples were collected from a 0.1m2 quadrat then sorted and analysed in the lab. The total weight of the sample was recorded. A subsample of 100 individuals was also weighed, as was the separated size (more than 45mm) and undersize individuals. Lengths of the subsample were measured to the nearest 1mm.
These were used to calculate total biomass of all mussels and all size mussels on each bed.