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Metadata: 2006-2010, SMRU Ltd., SeaGen Strangford Lough, Using Telemetry to Investigate the Effect of SeaGen on Harbour Seal Behaviour and Movement
Abstract:
One of the principal environmental concerns about tidal turbines is the potential for injurious collision with marine animals. Until recently there has been little opportunity to collect and analyse data to assess this risk. Three separate deployments of GPS tags on harbour seals in Strangford Lough and Narrows during the development of the SeaGen tidal turbine have provided the first opportunity to measure individual seal behaviour in relation to the presence and operation of a commercial scale tidal turbine. Thirty six seals were tagged over three years, in 2006 (pre-installation), 2008 (during installation) and 2010 (operation). There was no overall difference in the rate at which seals travelled up and down the narrows past the location of the turbine between the three deployments. However these average rates had wide confidence limits as a result of a wide degree of variation in the behaviour of individual seals. This uncertainty limited the use of this data for investigating differences between years. In 2010, when the turbine was operational, there was evidence that the rate at which seals transited the Narrows reduced when the turbine was on, relative to when it was off. The biological importance of this reduction is unknown at present. Over all three years the frequency of transits was higher at slack tide than when the current was running. Although visual inspection of the distribution of locations where seals chose to transit the narrows suggested local avoidance of the turbine site in 2010, high inter-individual variability limited our ability to detect any significant difference. Examining the rate of transits which were close to the turbine (<25m) when it was operating gives an average rate for each seal of 3 transits per year. Scaling up to the total population suggested that 300 such transits may have occurred during the period between April and August. There were 210 emergency shut downs during this same period. The results of this study suggest that the operation of the turbine is affecting the transit behaviour of seals in the narrows and therefore the risk of seals colliding with an operational tidal turbine may be lower than would be estimated by assuming no avoidance and a spatial and temporal uniform density of animals. This series contains the survey report.
Data holder:
Marine Current Turbines Limited
Use constraints:
http://marinedataexchange.co.uk/pages/terms-of-use.
| Other details | ||
| Internal code | Internally assigned metadata identifier | 5003 |
| 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. | 2006-2010, SMRU Ltd., SeaGen Strangford Lough, Using Telemetry to Investigate the Effect of SeaGen on Harbour Seal Behaviour and Movement |
| 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. | 88c1ac86-1ce3-41cf-8c16-851cc6043375 |
| Resource Identifier | This is the code assigned by the data owner. | SL_14 |
| 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. | series |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2006 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2010 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | inapplicable |
| 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'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | One of the principal environmental concerns about tidal turbines is the potential for injurious collision with marine animals. Until recently there has been little opportunity to collect and analyse data to assess this risk. Three separate deployments of GPS tags on harbour seals in Strangford Lough and Narrows during the development of the SeaGen tidal turbine have provided the first opportunity to measure individual seal behaviour in relation to the presence and operation of a commercial scale tidal turbine. Thirty six seals were tagged over three years, in 2006 (pre-installation), 2008 (during installation) and 2010 (operation). There was no overall difference in the rate at which seals travelled up and down the narrows past the location of the turbine between the three deployments. However these average rates had wide confidence limits as a result of a wide degree of variation in the behaviour of individual seals. This uncertainty limited the use of this data for investigating differences between years. In 2010, when the turbine was operational, there was evidence that the rate at which seals transited the Narrows reduced when the turbine was on, relative to when it was off. The biological importance of this reduction is unknown at present. Over all three years the frequency of transits was higher at slack tide than when the current was running. Although visual inspection of the distribution of locations where seals chose to transit the narrows suggested local avoidance of the turbine site in 2010, high inter-individual variability limited our ability to detect any significant difference. Examining the rate of transits which were close to the turbine (<25m) when it was operating gives an average rate for each seal of 3 transits per year. Scaling up to the total population suggested that 300 such transits may have occurred during the period between April and August. There were 210 emergency shut downs during this same period. The results of this study suggest that the operation of the turbine is affecting the transit behaviour of seals in the narrows and therefore the risk of seals colliding with an operational tidal turbine may be lower than would be estimated by assuming no avoidance and a spatial and temporal uniform density of animals. This series contains the survey report. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Metadata generated by The Crown Estate for the purpose of publishing on the Marine Data Exchange. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Renewable Energy Lease area |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Pre-Construction monitoring | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Construction monitoring | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Post-Construction monitoring | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Seal behaviour | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | gps | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Taggings | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Seal abundance | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Mammals | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network | |
| Keyword title | MEDIN | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network |
| Keyword title | MEDIN | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 54.40291 |
| East | The eastern-most limit of the data resource in decimal degrees | -5.493281 |
| South | The southern-most limit of the data resource in decimal degrees | 54.306874 |
| West | The western-most limit of the data resource in decimal degrees | -5.613444 |
| 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 | The Crown Estate | |
| Phone | +44 020 7851 5000 | |
| Delivery point | 16 New Burlington Place | |
| Postal code | W1S 2HX | |
| City | London | |
| Country | United Kingdom | |
| enquiries@thecrownestate.co.uk | ||
| URL | http://www.thecrownestate.co.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 | Marine Current Turbines Limited | |
| Phone | +44 (0)117 926 9906 | |
| Delivery point | St Brandon's House,, 27-29 Great George Street, | |
| Postal code | BS1 5QT | |
| City | Bristol | |
| URL | http://www.marineturbines.com/ | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | SMRU Ltd | |
| Phone | 01334 463446 | |
| Delivery point | 5, Atholl Crescent | |
| Postal code | EH3 8EJ | |
| City | Edinburgh | |
| smru@st-andrews.ac.uk | ||
| URL | http://www.smru.st-andrews.ac.uk/ | |
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk/details/1927/summary |
| Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk | |
| Dataset constraints | ||
| 20 Limitations on Public Access - Access constraints | copyright | |
| 20 Limitations on Public Access - Other constraints | This states any limitations on access to the data and uses free text. | http://marinedataexchange.co.uk/pages/terms-of-use. |
| 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. | http://marinedataexchange.co.uk/pages/terms-of-use.aspx |
| 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. | http://marinedataexchange.co.uk/pages/terms-of-use.aspx | |
| Available data formats | ||
| Data format | Format in which digital data can be provided for transfer | |
| 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. | 2010-11-05 |
| 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. | 2015-11-02 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery Profile |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 2.3.8 |