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A PhD was conducted at the University marine Biological Station Millport (UMBSM) and presented tot the University of London. The study investigated the native European flat oyster, Ostrea edulis, which was identified under UK government initiatives to conserve biodiversity as a "priority species". Research aimed to determine the conservation status of O. edulis in Scottish waters. A review management measures was undertaken and the development of guidelines for the conservation of O. edulis in Scotland were established.
University Marine Biological Station (UMBS), Millport
DASSH terms and conditions apply (https://www.dassh.ac.uk/terms-and-conditions)
Other details | ||
Internal code | Internally assigned metadata identifier | 5115 |
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 UMBSM Clyde Sea Conservation Status of the native oyster (Ostrea edulis L.) in Scotland |
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. | cbaf7fb65c17845220a9bef0cc460a21 |
Resource Identifier | This is the code assigned by the data owner. | UMBSM18175 |
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 | 2004-02-09 |
End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2005-12-01 |
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. | A PhD was conducted at the University marine Biological Station Millport (UMBSM) and presented tot the University of London. The study investigated the native European flat oyster, Ostrea edulis, which was identified under UK government initiatives to conserve biodiversity as a "priority species". Research aimed to determine the conservation status of O. edulis in Scottish waters. A review management measures was undertaken and the development of guidelines for the conservation of O. edulis in Scotland were established. |
Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Three study sites were established for investigation on the west coast of Scotland. West Loch Tarbert (Argyll), Linne Mhuirich, (Loch Sween) (Argyll) and Loch Ailort (Highlands) were selected due to the high population densities of O. edulis within their waters. Additional sites on the west and north coast of Scotland were visited in order to collect basic demographic data (Loch Ryan and Mull and Ulva). Survey sites around Mull and Ulva have not been included within this study due to commercial confidentiality however details are available to appropriate users upon request from the author. Population estimates of selected wild O. edulis populations were surveyed in 2004, using the multi-level transect survey methodology (section 3.2.2.1;Krebs, 1999). Fifteen sites within 10 geographical locations were surveyed. Transects were randomly located throughout oyster populations, except where transects were placed in areas of highest density. The locations, Ordinance Survey grid reference, dates and the number of transected completed at each study site is provided within the report. Each survey area was divided into 50m length sections along the shore. Each section was sub-divided into a grid with rectangular cells of 50 x 5m. One grid cell per section was randomly selected for surveying purposes. Cells were located using a GPS receiver and surveyed in random order. A 30m tape measure placed parallel to the shore marked out a transect within selected cells. A 1m squared quadrat was used to sample both sides of the transect at three randomly chosen distances within a 10m sub-section. A surveyed area of 18m squared was established per transect. Direct counts of living oysters, predators (Asterias rubens and carcius maenas) and competitor species (Anomia ephippium and Mytilus edulis) were recorded. Dial callipers were used to measure shell height and length. Percentage cover by different substrata was determined, including the percentage cover of algae. The mean density and abundance of oysters were estimated. Belt-transect surveys were also utilised. Each survey area was divided into 20m length sections along the shore and each section was sub-divided into a grid containing rectangular cells of 20 x 2m. Randomly selected cells were located by measuring alongshore and offshore coordinates with a tape measure. Transects marked with a 20m tape measure, parallel to the shoreline, were established within selected cells. Sampling was achieved by 1m square quadrats which were placed contiguously on either side of the transect giving a total survey area of 40m squared. Oysters within the quadrats were counted and shell height and length was measured. Limiting factors (settling substrata) for the abundance of O. edulis populations in Scotland were investigated. Oyster habitats at Taynish (Linne Mhuirich), Dun Mhuirich (Linne Mhuirich), Rhu (West Loch Tarbert) and Eilean nan Trom (Loch Ailort) were divided into 25m alongshore sections. Eight sections were randomly chosen and surveyed. A 25m tape measure was laid parallel to the shore along the midline of the bed section. Ten 1m squared quadrats divided into 5cm squares were placed randomly on bothsides of the tape measure. percentage cover of substrata was estimated. The numbers of O. edulis and A. ephippium were counted and the substrata they were attached to was recorded. The percentage cover and associated substratum of sessile organisms (algal species, tubeworms (Pomatoceros spp), barnacles (Chthamalus montagui, Semibalanus balanoides), mussels (Mytilus edulis) and tunicates (Ciona intestinalis, Ascidiella aspersa) was also recorded. Red "Marley" ridge tiles (45 x 30 x 8cm) were used as spat collectors which were laid in two parallel lines spaced 5m apart. The lower line was approximately 1m from the lower edge of the coarse-sediment substrata.. Forty six tiles were laid with 23 on each line. Tiles were placed at 20m intervals. Tiles were placed singly or as a pair (randomly decided). Spat collectors were laid in June 2004 and removed in February 2005 and relaid in June 2005 and removed in December 2005. The recruitment success of O. edulis was investigated. Allee effects were investigated for limiting potential. Inter-individual distances of oysters within six 36m squared plots at Taynish and Dun Mhuirich were investigated. Spatial distribution between exploited and unexpolited areas, and the distance from the centre of the bed to the edge was assessed. Plots were spaced 20m apart. The first plot was located at the approximate alongshore centre of the bed area. A buffer zone of 1m width around plot boundaries were established. Plots were sub-divided into 1m squared quadrats. The quadrats were further sub-divided into 10 x 10cm squares. Each square was surveyed. Oysters were numbered and their position was recorded on a reference map. Distances between the central point of each oyster and its three closest neighbours were measured using a tape measure. Shell length and height was measures using dial callipers to 0.1mm. |
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 | Species distribution | |
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 | |
Geographical coverage | ||
North | The northern-most limit of the data resource in decimal degrees | 56.1333 |
East | The eastern-most limit of the data resource in decimal degrees | -4.9658 |
South | The southern-most limit of the data resource in decimal degrees | 54.9208 |
West | The western-most limit of the data resource in decimal degrees | -5.7349 |
Regional sea | Irish Sea | |
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 | University Marine Biological Station (UMBS), Millport | |
Individual name | Carly Cassidy | |
Postal code | KA28 0EG | |
City | Millport | |
Role | The distributor is the person or organisation that distributes the resource. | distributor |
Organisation name | Data Archive for Seabed Species and Habitats (DASSH) | |
Position name | Data Manager | |
Phone | 01752 633102 | |
Fax | 01752 633291 | |
Delivery point | Marine Biological Association of the UK, The Laboratory, Citadel Hill | |
Postal code | PL1 2PB | |
City | Plymouth | |
Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
Organisation name | University Marine Biological Station (UMBS), Millport | |
Individual name | Philip Smith | |
Postal code | KA28 0EG | |
City | Millport | |
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 | University Marine Biological Station (UMBS), Millport | |
Individual name | Kathryn Stevenson | |
Postal code | KA28 0EG | |
City | Millport | |
Dataset constraints | ||
20 Limitations on Public Access - Access constraints | ISO restriction code chosen from ISO 19115-1 Codelist | otherRestrictions |
20 Limitations on Public Access – Other constraints | Any restriction on the use of the resource such as the need to agree to certain licence conditions. | DASSH terms and conditions apply (https://www.dassh.ac.uk/terms-and-conditions) |
21 Conditions for Access and Use - Use limitation | Any restrictions imposed on accessing the resource such as the need to agree to certain licence conditions. | Restrictions apply. Please contact UMBSM for further details. |
Available data formats | ||
Data format | Format in which digital data can be provided for transfer | Documents |
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. | 2006-01-01 |
Metadata date | The date when the content of this metadata record was last updated. | 2019-11-04 |
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 |
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