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Metadata: 1998 - Ongoing, North Western Inshore Fisheries and Conservation Authority (NWIFCA) Cockle Surveys
Abstract:
The NWIFCA conducts cockle surveys across its district in order to inform the management of this fishery. Data is collected on the density of cockles in an area, their status in relation to minimum landing size (20 mm) and age. Samples are also often taken for weighing and production of length frequency tables. This data can be used to estimate other parameters such as the mass of stock on the bed. In the past beds have been surveyed regularly (every year). However, the NWIFCA has moved toward a more adaptive survey strategy where beds are more often surveyed after reports of a possible commercial stock by local area officers.
Data holder:
Northwestern Inshore Fisheries and Conservation Authority
Click on the red button for resource contact details:
- Click on the red button for resource contact details
Use constraints:
No restrictions to public access
Other details | ||
Internal code | Internally assigned metadata identifier | 5606 |
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. | 1998 - Ongoing, North Western Inshore Fisheries and Conservation Authority (NWIFCA) Cockle Surveys |
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. | ea5cce71bf0b7c878642623503ddd102 |
Resource Identifier | This is the code assigned by the data owner. | NWIFCA_COC_ALL |
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 | 1998-01-01 |
End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2017-09-21 |
Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | 250 |
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'. | irregular |
Abstract | The abstract provides a clear and brief statement of the content of the resource. | The NWIFCA conducts cockle surveys across its district in order to inform the management of this fishery. Data is collected on the density of cockles in an area, their status in relation to minimum landing size (20 mm) and age. Samples are also often taken for weighing and production of length frequency tables. This data can be used to estimate other parameters such as the mass of stock on the bed. In the past beds have been surveyed regularly (every year). However, the NWIFCA has moved toward a more adaptive survey strategy where beds are more often surveyed after reports of a possible commercial stock by local area officers. |
Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Beds are surveyed using a series of survey points in a grid pattern, loaded onto GPS. This grid has a size of 50 to 500 m dependent on the size of bed and requirement for resolution. However, 250 m is the most common size. At each survey point a quadrat is placed onto the bed and cockles within this quadrat recorded. Two sizes of quadrat are used depending on the number and size of cockles present. A 0.5 m quadrat is used for less dense areas of large cockles. A jumbo is first used to bring cockles to the surface. A 0.1 m box quadrat is used for areas with dense spat settlements. Here the sediment within the quadrat is passed through a sieve. The number of cockles within a quadrat is recorded along with their age (determined from growth rings) and size (oversize, undersize, spat). Oversize (or size) cockles are those that do not pass through an opening 20 mm square. When there is a large number of spat an estimate is made as to their total number. Samples of cockles found in quadrats are taken for analysis in the lab. These are measured using a digital calliper to the nearest .5 mm and a wet weight taken. Available outputs from these surveys vary. These include raw data, amalgamated data, GIS data, thematic maps and reports. |
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 | Fauna abundance per unit area of the bed | |
Geographical coverage | ||
North | The northern-most limit of the data resource in decimal degrees | 55.0091 |
East | The eastern-most limit of the data resource in decimal degrees | -2.7356 |
South | The southern-most limit of the data resource in decimal degrees | 53.3046 |
West | The western-most limit of the data resource in decimal degrees | -3.7354 |
Regional sea | Irish Sea | |
35E6 | ||
36E6 | ||
37E6 | ||
38E6 | ||
39E6 | ||
37E7 | ||
Irish Sea and St. George's Channel | ||
benthic boundary layer | ||
soil and sediment | ||
troposphere | ||
VIIa | ||
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 | Northwestern Inshore Fisheries and Conservation Authority | |
Individual name | Data Officer | |
Role | The distributor is the person or organisation that distributes the resource. | distributor |
Organisation name | Northwestern Inshore Fisheries and Conservation Authority | |
Position name | North Western IFCA | |
Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
Organisation name | Northwestern Inshore Fisheries and Conservation Authority | |
Position name | North Western IFCA | |
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 | Northwestern Inshore Fisheries and Conservation Authority | |
Position name | North Western IFCA | |
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 restrictions 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. A charge may be applied to cover costs of compiling and sending data. |
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. | 2013-09-27 |
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. | 2017-09-21 |
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 |