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Metadata: 2014, Brown and May Marine, Greater Gabbard, Elasmobranch Long-Line Survey
Abstract:
The Marine Licence L/2013/00076 conditions associated with the Greater Gabbard Offshore Wind Farm (GGOWF) stipulate that elasmobranch monitoring must be undertaken post-construction. In order to fulfil these conditions a second post-construction longline survey targeting elasmobranchs was undertaken between the 4th and 7th August 2014 within and adjacent to the GGOWF and the cable route. The aim of the survey was to determine the abundance and distribution of elasmobranch species and the survey methodology was developed in consultation with the Marine Management Organisation (MMO). A total of 14 longlines were shot and hauled over the survey duration in which four species of elasmobranch were recorded; lesser spotted dogfish (Scyliorhinus canicula), thornback ray (Raja clavata), smoothhound sp. (Mustelus sp.) and tope (Galeorhinus galeus). S. canicula was the most abundant species recorded during the survey with the highest numbers caught within the wind farm. R. clavata was most abundant at stations along the export cable. S. canicula and G. galeus were recorded in the four sampling areas and all four elasmobranch species were caught within the wind farm. The smallest number of elasmobranch species were found at the export cable control stations. The majority of S. canicula and G.galeus caught during the survey were females, whereas for R. clavata and Mustelus sp. a higher proportion of males were recorded. Aggregations of elasmobranchs by sex and maturity could be in response to seasonal factors, changes in reproductive behaviour or increased prey availability. A recent review by the MMO (MMO, 2014) in relation to elasmobranchs and electromagnetic fields (EMFs) generated by offshore wind cabling concluded that there is “no evidence to suggest that EMFs pose a significant threat at the site or population level”.
Data holder:
The Crown Estate
| Other details | ||
| Internal code | Internally assigned metadata identifier | 19058 |
| 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, Brown and May Marine, Greater Gabbard, Elasmobranch Long-Line Survey |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | Elasmobranch Long-Line 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. | 2fb3d9c9-ebe5-4cdf-a67d-aa43a97ac677 |
| Resource Identifier | This is the code assigned by the data owner. | TCE-3523 |
| 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 | 2014-08-04 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2014-08-07 |
| 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. | The Marine Licence L/2013/00076 conditions associated with the Greater Gabbard Offshore Wind Farm (GGOWF) stipulate that elasmobranch monitoring must be undertaken post-construction. In order to fulfil these conditions a second post-construction longline survey targeting elasmobranchs was undertaken between the 4th and 7th August 2014 within and adjacent to the GGOWF and the cable route. The aim of the survey was to determine the abundance and distribution of elasmobranch species and the survey methodology was developed in consultation with the Marine Management Organisation (MMO). A total of 14 longlines were shot and hauled over the survey duration in which four species of elasmobranch were recorded; lesser spotted dogfish (Scyliorhinus canicula), thornback ray (Raja clavata), smoothhound sp. (Mustelus sp.) and tope (Galeorhinus galeus). S. canicula was the most abundant species recorded during the survey with the highest numbers caught within the wind farm. R. clavata was most abundant at stations along the export cable. S. canicula and G. galeus were recorded in the four sampling areas and all four elasmobranch species were caught within the wind farm. The smallest number of elasmobranch species were found at the export cable control stations. The majority of S. canicula and G.galeus caught during the survey were females, whereas for R. clavata and Mustelus sp. a higher proportion of males were recorded. Aggregations of elasmobranchs by sex and maturity could be in response to seasonal factors, changes in reproductive behaviour or increased prey availability. A recent review by the MMO (MMO, 2014) in relation to elasmobranchs and electromagnetic fields (EMFs) generated by offshore wind cabling concluded that there is “no evidence to suggest that EMFs pose a significant threat at the site or population level”. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Sampling gear: Standard longline gear was used for sampling. Longlines of 300m were set at each station, with 100 hooks per line, spaced approximately 3m apart. The specifications for which are given below in Table 3.2. The longline gear (Figure 3.2) was manually deployed on both flood and ebb tides with a gear marker set at the beginning of the fleet (Figure 3.3). Gear markers comprised of single-flagged dhan buoys (some with radar reflectors) and a coloured buff. Catch analysis: Fish species were analysed as follows: Number of individuals by species; Length of individuals by species Finfish: individual lengths (nearest cm below) - Herring (nearest 0.5 cm below) Sharks: individual lengths (nearest cm below), sex and maturity stage in males Rays: individual lengths and wing-width (nearest cm below), sex and maturity stage in males |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fish taxonomy-related counts |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Acoustic backscatter in the water column | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Fish abundance in water bodies | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Oceanographic geographical features | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Species distribution | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 51.98 |
| East | The eastern-most limit of the data resource in decimal degrees | 2 |
| South | The southern-most limit of the data resource in decimal degrees | 51.72 |
| West | The western-most limit of the data resource in decimal degrees | 1.85 |
| 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 | SSE Renewables | |
| Individual name | SSE Renewables | |
| dassh.enquiries@mba.ac.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 | The Crown Estate | |
| Phone | +44 020 7851 5000 | |
| enquiries@thecrownestate.co.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Brown and May Marine Ltd. | |
| Position name | GIS Officer | |
| gis@brownmay.com | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | The Crown Estate | |
| Phone | +44 020 7851 5000 | |
| enquiries@thecrownestate.co.uk | ||
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | SSE Renewables | |
| info@sserenewables.com | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk/details/TCE-3523/summary |
| Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk | |
| Dataset constraints | ||
| 20.1 Limitations on Public Access - Access constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 20.2 Limitations on Public Access - Other constraints | There will be no limitations when published on the Marine Data Exchange | |
| Once published, there will be no limitations on public access. Data must be used in accordance with the Marine Data Exchanges Terms of Use which can be found on the website. | ||
| 21.1 Conditions for Access and Use - Use constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 21.2 Conditions for Access and Use - Other constraints | 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 Must be used in accordance to the Marine Data Exchange's Terms of Use: https://www.marinedataexchange.co.uk/content/info/terms-of-use |
| 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. | Once published, there will be no constraints on access and use. Data must be used in accordance with the Marine Data Exchanges Terms of Use which can be found on the website. | |
| 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. | 2024-04-02 |
| Date of last revision | The most recent date that the resource was revised. | 2014-11-17 |
| Date of creation | The date that the resource was created. | 2014-08-04 |
| 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. | 2026-03-09 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 3.1.2 |