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Metadata: Taw Torridge Subtidal Mussel Assessment 2021
Abstract:
To expand on the 2020 DSIFCA Taw Torridge subtidal mussel survey, a side scan sonar (SSS) and grab survey was carried out in 2021. This was undertaken to gain a better understanding of the extent of the subtidal mussel beds. As this was the first time DSIFCA have used the SSS methodology, proof of concept was a secondary objective of the project. A Tritech SeaKing Towfish SSS was deployed on the 14th October 2021 for a total of 13 transects of different lengths throughout the Estuary. This data was then analysed to plan the grab stations for ground-truthing the SSS signature, with 45 grab stations being identified. A total of 89 grabs were carried out across the stations on the 15th October 2021, with an Offset Day Grab with a sampling area of 0.1m². The survey was carried out by a DSIFCA and a Cornwall IFCA officer on board a local fishing vessel. Data includes georeferenced SSS tracks, georefenced grab success/failure, count of mussel in each grab and mussel length data for all mussels collected in grabs.
Data holder:
Devon and Severn Inshore Fisheries and Conservation Authority
Use constraints:
Contact Devon and Severn Inshore Fisheries and Conservation Authority to request full report: office@devonandsevernifca.gov.uk, 01803 854648
| Other details | ||
| Internal code | Internally assigned metadata identifier | 1972 |
| 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. | Taw Torridge Subtidal Mussel Assessment 2021 |
| 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. | 86afa681ad7865cba8d8f8f4b82a6d2b |
| Resource Identifier | This is the code assigned by the data owner. | TTSUBTIDALMUSSEL2021DSIFCA |
| 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 | 2021-10-14 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2021-10-15 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | 150 |
| 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'. | continual |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | To expand on the 2020 DSIFCA Taw Torridge subtidal mussel survey, a side scan sonar (SSS) and grab survey was carried out in 2021. This was undertaken to gain a better understanding of the extent of the subtidal mussel beds. As this was the first time DSIFCA have used the SSS methodology, proof of concept was a secondary objective of the project. A Tritech SeaKing Towfish SSS was deployed on the 14th October 2021 for a total of 13 transects of different lengths throughout the Estuary. This data was then analysed to plan the grab stations for ground-truthing the SSS signature, with 45 grab stations being identified. A total of 89 grabs were carried out across the stations on the 15th October 2021, with an Offset Day Grab with a sampling area of 0.1m². The survey was carried out by a DSIFCA and a Cornwall IFCA officer on board a local fishing vessel. Data includes georeferenced SSS tracks, georefenced grab success/failure, count of mussel in each grab and mussel length data for all mussels collected in grabs. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | To expand on the 2020 DSIFCA Taw Torridge subtidal mussel survey, a side scan sonar (SSS) and grab survey was carried out in 2021. This was undertaken to gain a better understanding of the extent of the subtidal mussel beds. As this was the first time DSIFCA have used the SSS methodology, proof of concept was a secondary objective of the project. A Tritech SeaKing Towfish SSS was deployed on the 14th October 2021 for a total of 13 transects of different lengths throughout the Estuary. This data was then analysed to plan the grab stations for ground-truthing the SSS signature, with 45 grab stations being identified. A total of 89 grabs were carried out across the stations on the 15th October 2021, with an Offset Day Grab with a sampling area of 0.1m². The survey was carried out by a DSIFCA and a Cornwall IFCA officer on board a local fishing vessel. Data includes georeferenced SSS tracks, georefenced grab success/failure, count of mussel in each grab and mussel length data for all mussels collected in grabs. A Hemisphere Atlas Link GNSS GPS was used for SSS coordinates and a handheld Garmin GPSMAP 64s was used for grab coordintaes. report on this survey is available through DSIFCA online resource library. |
| 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 | Geology | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Land cover | |
| 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 | Side-scan sonar | |
| 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 | 51.0822 |
| East | The eastern-most limit of the data resource in decimal degrees | -4.1593 |
| South | The southern-most limit of the data resource in decimal degrees | 51.0511 |
| West | The western-most limit of the data resource in decimal degrees | -4.2334 |
| Regional sea | Western Channel and Celtic Sea | |
| circalittoral | ||
| 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 | Devon and Severn Inshore Fisheries and Conservation Authority | |
| Individual name | Devon and Severn IFCA | |
| office@devonandsevernifca.gov.uk | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Devon and Severn Inshore Fisheries and Conservation Authority | |
| Individual name | Devon and Severn IFCA | |
| office@devonandsevernifca.gov.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Devon and Severn Inshore Fisheries and Conservation Authority | |
| Individual name | Devon and Severn IFCA | |
| office@devonandsevernifca.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 | Devon and Severn Inshore Fisheries and Conservation Authority | |
| Individual name | Devon and Severn IFCA | |
| office@devonandsevernifca.gov.uk | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | http://www.devonandsevernifca.gov.uk/Resource-library/H-Environment-and-Research |
| Locator name | Name of the web resource | Link to the Devon and Severn Inshore Fisheries and Conservation Authority Resource Library research page |
| 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. | Contact Devon and Severn Inshore Fisheries and Conservation Authority to request full report: office@devonandsevernifca.gov.uk, 01803 854648 |
| 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 are 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. |
| 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. | 2021-01-18 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-19 |
| Metadata date | The date when the content of this metadata record was last updated. | 2022-04-04 |
| 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 |