© OpenStreetMap contributors
- Add External Layer
- Upload Shapefile
- Layer Tutorial
- Close
Use the checkbox () to show or hide a layer.
Use the radio buttons () to select a layer to use with the identify function.
- Layers
- Opacity
Available layers
(ctrl+c)
Search for marine data across UK organisations
- API
- How-To
- About
- Contact MEDIN
- Share
Metadata: 2014 - Present, Cornwall Inshore Fisheries and Conservation Authority (IFCA) Fal Oyster Survey
Abstract:
Cornwall Inshore Fisheries and Conservation Authority (IFCA) conduct annual dredge surveys within the Fal Oyster Fishery since taking over management of the fishery in 2014. The purpose of the survey was initially to assess the distribution and abundance of native oysters (Ostrea edulis) within the Fal Fishery management area in the River Fal, Cornwall. Since 2016 the survey has been developed to also assess queenies (queen scallop, Aequipecten opercularis; variegated scallop, Mimachlamys varia) distribution and abundance. Slipper limpets (Crepidula fornicata) were initially recorded at each site using a SACFOR style scheme which was amended in 2018 to a count for this species. The aims of the survey were to investigate the relative abundance and distribution of native oysters (O. edulis), scallops (queen scallop, A. opercularis; variegated scallop, M. varia) and slipper limpets (C. fornicata) within the Fal Oyster Fishery. The distribution of substrate types across the fishery and species of bycatch were also recorded at each site in 2019.
Data holder:
Cornwall 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 | 635 |
| 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. | 2014 - Present, Cornwall Inshore Fisheries and Conservation Authority (IFCA) Fal Oyster 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. | 26dee2f510202899e51ae2e5c876a51c |
| Resource Identifier | This is the code assigned by the data owner. | CIFCA_FAL_OYS_2014-Present |
| 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 | 2014-03-19 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2024-02-28 |
| Vertical extent (min) | A positive or negative decimal number, for example, the shallowest depth recorded if subtidal, or, if intertidal, the lowest point recorded. | 0.8000 |
| Vertical extent (max) | A positive or negative decimal number, for example, the deepest depth recorded if subtidal, or, if intertidal, the highest point recorded. | 10.0000 |
| Vertical extent reference | This descibes the vertical coordinate reference system as referred to in the EPSG register of geodetic parameters. (epsg-registry.org) | urn:ogc:def:crs:EPSG::5861 |
| 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'. | annually |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | Cornwall Inshore Fisheries and Conservation Authority (IFCA) conduct annual dredge surveys within the Fal Oyster Fishery since taking over management of the fishery in 2014. The purpose of the survey was initially to assess the distribution and abundance of native oysters (Ostrea edulis) within the Fal Fishery management area in the River Fal, Cornwall. Since 2016 the survey has been developed to also assess queenies (queen scallop, Aequipecten opercularis; variegated scallop, Mimachlamys varia) distribution and abundance. Slipper limpets (Crepidula fornicata) were initially recorded at each site using a SACFOR style scheme which was amended in 2018 to a count for this species. The aims of the survey were to investigate the relative abundance and distribution of native oysters (O. edulis), scallops (queen scallop, A. opercularis; variegated scallop, M. varia) and slipper limpets (C. fornicata) within the Fal Oyster Fishery. The distribution of substrate types across the fishery and species of bycatch were also recorded at each site in 2019. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | In 2014 Cornwall Inshore Fisheries and Conservation Authority (IFCA) took over the management of the Fal oyster fishery, following the expiry of the Truro Port Fishery Order 1936 (as amended), and assumed responsibility for the continuation of oyster surveys and monitoring the stock of native oysters (Ostrea edulis) within the fishery, previously conducted by CEFAS/Cornwall Council. For data continuity the 95 sample sites used previously by CEFAS/ Cornwall Council were largely adopted for this survey, the exceptions being sites located on sensitive habitats (including seagrass and maerl beds) which could be damaged by the survey. A 72cm blade, Essex-style oyster dredge is used, rigged with 34mm diameter steel belly rings and a 45 mm (twin 3 mm nylon twine) mesh back. At each survey site the survey vessel is anchored and 60m of anchor line let out, the dredge is shot by hand and the hydraulic winch used to take up 50m of anchor line, resulting in a 50m dredge tow at a steady 0.5 to 1 knots. Each sample is photographed on the cultch board alongside the clapper board prior to sorting. Live oysters and scallops (queen/ variegated scallop) are counted and measured across the widest point (oysters) and along the length of the valve (from the hinge to the outer edge) (Scallops), to the nearest millimetre. Observations of substrate and by-catch are recorded alongside the oyster and scallop data for each dredge sample. An abundance scale is used to categorise substrate content, including slipper limpet (Crepidula fornicata) shell abundance. This should not be considered a definitive record of by-catch present at each site as it is not the primary reason for the survey. The size frequency distribution was graphed in Microsoft Excel and density maps were created in MapInfo Pro Advanced Version 17.0. Analysis was carried out comparing data from the geographic areas; outer harbour, harbour and river and management areas; A, B and C to ensure compatibility of the data with the oyster permit returns. For a full methodology please refer to the survey reports for each year. |
| Additional information | This describes relevant references to the data e.g. reports, articles, websites plus other useful information not captured elsewhere. | All reports are available on request |
| 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 | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Bivalve molluscs | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 50.2482 |
| East | The eastern-most limit of the data resource in decimal degrees | -5.0063 |
| South | The southern-most limit of the data resource in decimal degrees | 50.1554 |
| West | The western-most limit of the data resource in decimal degrees | -5.0653 |
| Regional sea | Western Channel and Celtic Sea | |
| 29E4 | ||
| English Channel | ||
| VIIe | ||
| water column | ||
| 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 | Cornwall Inshore Fisheries and Conservation Authority | |
| Position name | Data Officer Cornwall IFCA Research Team | |
| enquiries@cornwall-ifca.gov.uk | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Cornwall Inshore Fisheries and Conservation Authority | |
| Individual name | Research Team Cornwall IFCA | |
| enquiries@cornwall-ifca.gov.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Cornwall Inshore Fisheries and Conservation Authority | |
| Individual name | Research Team Cornwall IFCA | |
| enquiries@cornwall-ifca.gov.uk | ||
| 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 | Cornwall Inshore Fisheries and Conservation Authority | |
| Individual name | Research Team Cornwall IFCA | |
| enquiries@cornwall-ifca.gov.uk | ||
| 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 and permission must be sought if the data will be reproduced in full or part or if used in any analyses. |
| 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. | 2021-05-12 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-12 |
| Metadata date | The date when the content of this metadata record was last updated. | 2024-02-28 |
| 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 |