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Metadata: FishDAC - Scallop Survey (Scotland) 2025 - Shetland
Abstract:
Objectives 1. To carry out a survey of King scallop stocks around the Shetland Islands. 2. To age, measure and assess shell damage on all King scallops caught. 3. To collect information on by-catch of other commercial fish and shellfish species. 4. To identify, quantify and damage assess starfish species in all dredge tows. 5. To collect whole scallops for heavy metal testing as part of the OSPAR assessment of hazardous substances in the marine environment. 6. To record and retain marine litter obtained during the dredging process (monitoring for Marine Strategy Framework Directive). 7. To collect scallop shells to form part of a reference and training set for Scotland. 8. To collect King scallops showing any shell deformities. 9. Accommodate a scientist from the University of the Highlands and Islands.
Data holder:
Scottish Government (Marine Scotland)
Use constraints:
no limitations to public access
| Other details | ||
| Internal code | Internally assigned metadata identifier | 4043 |
| 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. | FishDAC - Scallop Survey (Scotland) 2025 - Shetland |
| 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. | Marine_Scotland_FishDAC_12537 |
| Resource Identifier | This is the code assigned by the data owner. | Marine_Scotland_FishDAC_12537 |
| 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 | 2025-01-26 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2025-02-10 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | 200.00 |
| 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'. | unknown |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | Objectives 1. To carry out a survey of King scallop stocks around the Shetland Islands. 2. To age, measure and assess shell damage on all King scallops caught. 3. To collect information on by-catch of other commercial fish and shellfish species. 4. To identify, quantify and damage assess starfish species in all dredge tows. 5. To collect whole scallops for heavy metal testing as part of the OSPAR assessment of hazardous substances in the marine environment. 6. To record and retain marine litter obtained during the dredging process (monitoring for Marine Strategy Framework Directive). 7. To collect scallop shells to form part of a reference and training set for Scotland. 8. To collect King scallops showing any shell deformities. 9. Accommodate a scientist from the University of the Highlands and Islands. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Dredge surveys of the scallop grounds around Scotland have been carried out by Marine Directorate (MD) since the mid-1990’s (partial surveys of the west coast began in the late 1980’s). There are currently four surveys each year which collectively cover the major scallop fishing grounds to the west of Scotland (including Clyde), the North Sea (Scottish coast) and around Shetland. MD has carried out 28 surveys around Shetland with the first one being carried out in 1995. Thereafter, surveys were done on an annual basis with 1997, 2014 and 2015 the only years where they did not take place due to bad weather. Three vessels have been used to conduct the surveys, Cornucopia in 1995 and 1996, Clupea from 1998 to 2008 and Marine Research Vessel (MRV) Alba na Mara from 2009 to the present day. The main aim of the survey is to collect standardised catch rate data for King scallops for use in stock assessment. Method The surveys have a fixed station design. The station locations were originally determined with reference to British Geological Survey charts to locate sediments suitable for scallops and also using knowledge of the fishing grounds contributed by skippers fishing at the time when the surveys first took place. There are around 90 fixed stations which have been historically fished around Shetland, however, these are not all carried out every year as the survey can be affected by time constraints, bad weather, aquaculture activity and closed areas. The west of Shetland is not covered on a regular basis due to the prevailing westerly winds limiting access by a small research vessel. An average Shetland survey of this duration with favourable weather conditions would aim to fish 40 to 50 of the stations. Two dredge arrays were fished (one either side of the research vessel, Alba na mara). One array consisted of standard commercial spring-loaded Newhaven type dredges (75 cm wide, nine tooth bar, with 80 mm internal diameter belly rings, Type A, referred to as S9 fished from the starboard side). The second array consisted of smaller configuration sampling dredges with 11 teeth and smaller diameter belly rings (Type B), more similar to commercial gear for queen scallops (Aequipecten opercularis) (75 cm wide, 11 tooth bar, with 60 mm internal diameter belly rings, referred as P11 fished from the port side). This side of gear is configured to catch smaller scallops compared to the commercial dredges. At each station the dredges were towed at a speed of about 2.5 knots for approximately 30 minutes with both sides of dredges on the seabed. All king scallops caught were aged and measured (length to the 0.5 cm below) in accordance with the MD Scallop ageing standard operating procedure and damage assessed in accordance with the damage index¬¬1. The total width of dredges used in the survey has changed over the survey time series. Catch rate data are, therefore, further standardised and expressed as numbers caught per hour per metre dredge width (N hr-1 m-1). Bycatch, including starfish, were collected, identified, measured, sexed and damage assessed, with the same damage index referenced for the scallops, where appropriate. |
| Additional information | This describes relevant references to the data e.g. reports, articles, websites plus other useful information not captured elsewhere. | http://www.scotland.gov.uk/Topics/marine/marine-environment/species/fish/shellfish/scallop http://www.scotland.gov.uk/Publications/2013/09/6505/24 http://www.scotland.gov.uk/Publications/2013/01/9421 |
| 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 | Fish and shellfish catch statistics | |
| 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 | Habitats and biotopes | |
| 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 | Introduction of energy does not adversely affect the marine environment | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 61 |
| South | The southern-most limit of the data resource in decimal degrees | 59.5 |
| West | The western-most limit of the data resource in decimal degrees | -2 |
| Regional sea | 48E8 | |
| 49E8 | ||
| 50E8 | ||
| 49E9 | ||
| 50E9 | ||
| 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 | Scottish Government (Marine Scotland) | |
| Phone | +44 (0)300 244 4000 | |
| marinescotland@gov.scot | ||
| 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 | Scottish Government (Marine Scotland) | |
| Phone | +44 (0)300 244 4000 | |
| Delivery point | Mailpoint 11, Area 1B South, Victoria Quay | |
| Postal code | EH6 6QQ | |
| City | Edinburgh | |
| Country | United Kingdom | |
| marinescotland@gov.scot | ||
| 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 | Scottish Government (Marine Scotland) | |
| Phone | +44 (0)300 244 4000 | |
| Delivery point | Mailpoint 11, Area 1B South, Victoria Quay | |
| Postal code | EH6 6QQ | |
| City | Edinburgh | |
| Country | United Kingdom | |
| marinescotland@gov.scot | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Scottish Government (Marine Scotland) | |
| Phone | +44 (0)300 244 4000 | |
| Delivery point | Mailpoint 11, Area 1B South, Victoria Quay | |
| Postal code | EH6 6QQ | |
| City | Edinburgh | |
| Country | United Kingdom | |
| marinescotland@gov.scot | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Marine Scotland Science | |
| Delivery point | 375 Victoria Road | |
| Postal code | AB11 9DB | |
| City | Aberdeen | |
| Country | United Kingdom | |
| marinescotland@gov.scot | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | NA |
| Locator function | Code that describes the function of the resource. ISO function code chosen from ISO 19115-1 Codelist | offlineAccess |
| 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 limitations 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. | Contains information from the Scottish Government (Marine Scotland) licensed under the Open Government Licence |
| 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. | 2025-02-25 |
| 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. | 2025-02-25 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery Metadata |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | Version 2.3.7 |