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Metadata: Assessment of potential predators of plaice eggs and larvae in the Irish Sea
Abstract:
Data on fish counts, lengths and stomach contents analysis from fish caught in the Irish Sea in 2008 and 2009 to investigate the potential predators of plaice eggs. Also included are station data and ichthyoplankton analysis counts.
Data holder:
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
| Other details | ||
| Internal code | Internally assigned metadata identifier | 9572 |
| 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. | Assessment of potential predators of plaice eggs and larvae in the Irish Sea |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | PREDATE - Detecting predation of fish eggs and larvae |
| 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. | CEFAS458bfe71-51eb-4309-b29b-8cc769d86e43 |
| Resource Identifier | This is the code assigned by the data owner. | CEFAS727 |
| 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 | 2008-02-22 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2009-02-28 |
| 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. | Data on fish counts, lengths and stomach contents analysis from fish caught in the Irish Sea in 2008 and 2009 to investigate the potential predators of plaice eggs. Also included are station data and ichthyoplankton analysis counts. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Research cruises were undertaken on the research vessel CEFAS Endeavour in the eastern Irish Sea on a well described plaice spawning ground located off the North Wales coast in February 2008 and 2009. The full range of predators with the potential to consume plaice eggs and larvae and their spatial and temporal distributions were investigated using vertical plankton samplers, acoustic surveys and various trawls. Stomach samples were taken for subsequent analysis using genetic (TaqMan) probes. Associated measurements of temperature, salinity and depth of the water column were also taken. Plankton samples were collected using a Gulf VII plankton sampler, fitted with a 40cm aperture nosecone and 270mm mesh net. The samplers were deployed on a grid of 12 stations in a double oblique tow from sea surface to near bottom and back. A Valeport Conductivity Temperature and Density (CTD) profiler mounted on the sampler provided depth, salinity and temperature profiles for each plankton tow as well as ‘real time’ flowmeter data. The plankton was gently washed down from the samplers into an end-bag which was removed and the plankton washed into a jar and fixed using buffered formaldehyde solution (4% formaldehyde in distilled water buffered with 2.5% sodium trihydrate (w/v)). The samples were analysed at the CEFAS laboratory, Lowestoft. Fish eggs and larvae were picked out of the preserved samples using low power microscopes, and, whenever practicable, the whole sample was sorted. Sub-sampling, however, was at times necessary and this was carried out using a Folsom splitter. Using this method a fraction of the sample (for example ?, ¼ or ½) was worked up as appropriate. Ichthyoplankton from these surveys was identified according to Russell (1976). This was supplemented by various identification guides and keys produced by the International Council for the Exploration of the Sea (Saville, 1964; Macer, 1967; Nichols, 1971; Demir, 1976; Nichols, 1976). Fish eggs were initially split into groups on the basis of presence or absence of oil globules. Those containing either a single or many oil globules could usually be identified to the species level. Eggs with no oil globules are more difficult to separate, particularly in the early stages before embryonic pigmentation develops, and as a result it is not possible to identify a proportion of these. However, egg size was recorded. Fish larvae were generally easy to identify unless they had been badly damaged during collection. For some groups, such as the sandeels (Ammodytidae) and the rocklings (Gadidae), individuals were not identified to the species level. Plankton data were expressed as number of organisms m-³ by dividing the numbers per sample by the volume filtered. The full dataset is stored on ACCESS (Microsoft Inc.) databases held at CEFAS. Bioness multinet and hyperbenthic sledge were deployed to collect plankton samples. Acoustic transect lines were used to locate potential predators of plaice eggs, Sandeel and Portuguese High Headline Trawls were then carried out so stomach samples could be collected. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Biota abundance, biomass and diversity |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Water column temperature and salinity | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Plankton | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Advice | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Analysis | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Management | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Monitoring | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Population dynamics | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Stock (biological) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Biodiversity | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Sample | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Species | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Plankton abundance per unit volume of the water column | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Salinity of the water column | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Density of the water column | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Temperature of 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 | Species distribution | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Upper epipelagic | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Epipelagic | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Mesopelagic | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Bathypelagic | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Abyssopelagic | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Water column | |
| 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 | data.gov.uk | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 54.5 |
| East | The eastern-most limit of the data resource in decimal degrees | -2.5 |
| South | The southern-most limit of the data resource in decimal degrees | 53 |
| West | The western-most limit of the data resource in decimal degrees | -7 |
| 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 | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.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 | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Department for Environment, Food and Rural Affairs (DEFRA) | |
| defra.helpline@defra.gov.uk | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://data.cefas.co.uk/view/727 |
| Locator name | Name of the web resource | Cefas Data Portal |
| 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 | noLimitations | |
| 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 | http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_RestrictionCode | |
| 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. | 2016-06-16 |
| Date of last revision | The most recent date that the resource was revised. | 2023-01-31 |
| Date of creation | The date that the resource was created. | 2013-01-30 |
| 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. | 2023-01-31 |
| 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 | 3.1.1 |