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Metadata: 2003 - Ongoing, EIFCA, (Eastern Inshore Fisheries and Conservation Authority), The Wash, Mussel Survey
Abstract:
Mussel surveys are carried out once a year during Autumn/Winter. Data is collected for stock assessments to inform fisheries management (opening times, Total Allowable Catch, which cockle beds to open, which fishery to open) as per the Wash Fishery Order fihseries managed by the IFCA. Data also forms part of the Appropriate Assessment process required to open a fishery under Regulation 61 of The Conservation of Habitats and Species Regulations 2010 (SI No. 2010/490), regarding The Wash and North Norfolk Coast Special Area of Conservation (Habitats Directive), The Wash Special Protected Area (Birds directive), the Wash Ramsar and SSSIs. Abundance and weight by year-class and width is recorded from several sites within around 20 mussel beds in The Wash. Data is initially recorded by hand then is input into MapInfo to make density charts; data is then exported into Excel tables for reference. Surveys are conducted by day-grabs were access is available however foot surveys are conducted at some sites.
Data holder:
Eastern Inshore Fisheries and Conservation Authority
Use constraints:
No restriction to public access
Other details | ||
Internal code | Internally assigned metadata identifier | 4142 |
Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | 2003 - Ongoing, EIFCA, (Eastern Inshore Fisheries and Conservation Authority), The Wash, Mussel Survey |
File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | 8b027beca9f43cb7067d9f4c52138a2f |
Resource Identifier | This is the code assigned by the data owner. | EIFCA000002 |
Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2003-01-01 |
End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2016-11-01 |
Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | 370 |
Spatial resolution unit | This describes the unit of spatial resolution which for distance must be metres. | http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/uom/gmxUom.xml#m |
Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | annually |
Abstract | The abstract provides a clear and brief statement of the content of the resource. | Mussel surveys are carried out once a year during Autumn/Winter. Data is collected for stock assessments to inform fisheries management (opening times, Total Allowable Catch, which cockle beds to open, which fishery to open) as per the Wash Fishery Order fihseries managed by the IFCA. Data also forms part of the Appropriate Assessment process required to open a fishery under Regulation 61 of The Conservation of Habitats and Species Regulations 2010 (SI No. 2010/490), regarding The Wash and North Norfolk Coast Special Area of Conservation (Habitats Directive), The Wash Special Protected Area (Birds directive), the Wash Ramsar and SSSIs. Abundance and weight by year-class and width is recorded from several sites within around 20 mussel beds in The Wash. Data is initially recorded by hand then is input into MapInfo to make density charts; data is then exported into Excel tables for reference. Surveys are conducted by day-grabs were access is available however foot surveys are conducted at some sites. |
Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Altough the surveys have been conducted prior to 2003, survey methodology changed to the current methods in that year. Data from previous years is not currently digitised. No end date was given as the survey is ongoing. The publish date for the 2011 research reoprt relates to when the report was placed on the EIFCAs website. The perimeter of each bed was defined by walking around the bed at low water and entering waypoints into a portable GPS unit. These waypoints were transferred to a Geographic Information System (GIS), MapInfo, from which the perimeter of each bed was plotted, allowing an estimation of their area to be made. Transect surveys were conducted across the bed to ascertain the coverage and density of mussel. Transects were chosen that would attain the most even coverage of the bed that the low water period and the extent of the bed would allow. The route of transects across the bed were recorded by entering waypoints into the GPS unit and later plotting them in MapInfo. As transects were walked across the bed, the coverage of mussels was determined using an 11cm ring attached to a pole. Every three paces the ring was placed down on the mussel bed and the resence (hit) or absence (miss) of mussels within the ring recorded. Randomisation was achieved by placing the ring down to one side, outside of the field of vision of the user. Mussel samples, used to determine the biomass of the mussels on the bed, were collected from those contained within the rings. Depending on the length of the track and the mussel density, it was decided in advance if all hits were to be sampled, or whether a lower proportion could be used to provide a total sample large enough to determine the average density and size frequency of the population. In the case of these surveys a sampling frequency of between once every second hit and once every seventh hit was used. Samples taken from the rings were collected in a container. Every 450 paces, after 150 hit/miss determinations had been conducted, the samples were washed using a 0.5mm sieve and placed in labelled bags. On returning to the research vessel the live mussels were separated from the debris in each sample. The length of each mussel was determined, and the samples divided into those mussels that were of marketable size (>45mm) and those that were smaller. The weights of these samples were then recorded. During this years surveys, the number and weight of mussels >25mm length were also recorded as this size range is favoured by oystercatchers. The coverage, density and area of the mussel bed were multiplied together to estimate the biomass of mussels on the bed. Size distributions were obtained from the length measurements of mussel in the retained samples. |
Related keywords | ||
Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | NDGO0005 | |
Keyword title | data.gov.uk | |
Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Species distribution |
General subject area(s) associated with the resource, uses multiple controlled vocabularies | Shellfish abundance and biomass in water bodies | |
Geographical coverage | ||
North | The northern-most limit of the data resource in decimal degrees | 53.1567 |
East | The eastern-most limit of the data resource in decimal degrees | 0.6262 |
South | The southern-most limit of the data resource in decimal degrees | 52.7862 |
West | The western-most limit of the data resource in decimal degrees | 0.0385 |
Regional sea | Southern North Sea | |
benthic boundary layer | ||
Responsible organisations | ||
Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
Organisation name | Eastern Inshore Fisheries and Conservation Authority | |
Individual name | MEO Data lead | |
Position name | MEO Data Lead | |
Role | The distributor is the person or organisation that distributes the resource. | distributor |
Organisation name | Eastern Inshore Fisheries and Conservation Authority | |
Individual name | MEO Data lead | |
Position name | MEO Data Lead | |
Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
Organisation name | Eastern Inshore Fisheries and Conservation Authority | |
Individual name | Ron Jessop | |
Position name | Senior Research Officer | |
Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
Organisation name | Eastern Inshore Fisheries and Conservation Authority | |
Individual name | MEO Data lead | |
Position name | MEO Data Lead | |
Resource locators | ||
Locator URL | Web address (URL) that links to the resource | http://www.eastern-ifca.gov.uk/index.php?option=com_content&view=article&id=15&Itemid=30 |
Locator name | Name of the web resource | Research report 2011 |
Dataset constraints | ||
20 Limitations on Public Access - Access constraints | otherRestrictions | |
20 Limitations on Public Access - Other constraints | This states any limitations on access to the data and uses free text. | No restriction to public access |
21 Conditions for Access and Use - Use limitation | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | Data is freely available for research or commercial use providing that the originators are acknowledged in any publications produced, charts are not to be used for navigation. |
Available data formats | ||
Data format | Format in which digital data can be provided for transfer | Delimited |
Version info | ||
Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2012-04-18 |
Harvest date | The date which this record has been (re)harvested from the provider. | 2024-04-21 |
Metadata date | The date when the content of this metadata record was last updated. | 2016-11-15 |
Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery metadata standard |
Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 2.3.8 |