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Metadata: Zooplankton data from Ring net, CALPS and PIA from the Western English Channel and Eastern Irish Sea in 2016
Abstract:
Zooplankton data was collected from 3 different devices: Ring net, Continuous automated Litter and Plankton Sampler (CALPS) and Plankton Image Identifier (PIA), during the PELTIC 2016 survey (Pelagic ecosystem in the western English Channel and eastern Celtic Sea, 3rd to the 19th October) on board the RV “Cefas Endeavour”. Zooplankton samples and images were collected at 40 stations during the night.
Data holder:
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
| Other details | ||
| Internal code | Internally assigned metadata identifier | 11018 |
| 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. | Zooplankton data from Ring net, CALPS and PIA from the Western English Channel and Eastern Irish Sea in 2016 |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | DC006 zooplankton data |
| 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. | CEFASe8cb7410-5e10-4847-9546-78c4428b06e8 |
| Resource Identifier | This is the code assigned by the data owner. | CEFAS18541 |
| 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 | 2016-10-03 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2016-10-19 |
| 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. | Zooplankton data was collected from 3 different devices: Ring net, Continuous automated Litter and Plankton Sampler (CALPS) and Plankton Image Identifier (PIA), during the PELTIC 2016 survey (Pelagic ecosystem in the western English Channel and eastern Celtic Sea, 3rd to the 19th October) on board the RV “Cefas Endeavour”. Zooplankton samples and images were collected at 40 stations during the night. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Depth-integrated vertical hauls using the Ring net were deployed with the aim of sampling from 3m above the seabed to the surface. Due to the absence of real time depth information, to attempt to achieve this the amount of cable used was 3m less than the water depth. During periods of slack water this was relatively successful, but due to the strong tides at certain times and locations, some samples did not sample the full water column. An 80 micron mesh net was used, mounted on a 0.5-m-diameter ring frame equipped with a General Oceanics mechanical flowmeter (model 2030RC, which includes a mechanism to prevent the rotor from turning backwards) mounted in the centre of the aperture of the net. A mini-CTD (SAIV) was attached to the bridle recording pressure (depth), temperature and salinity. The net was hauled to the surface at a speed of 0.5 m/s. The net was washed down and the end bag thoroughly rinsed with sea water before preserving the sample in 4 percent formaldehyde. Position, date, time, seabed depth and sampled depth (from CTD attached to net) were recorded and the volume filtered was calculated from the flowmeter readings. The CALPS consists of a pump system and additional elements fitted onto the research vessel. The additional elements include a water inlet of 20 cm diameter, a flowmeter, six cylinder traps and associated valves and level detectors to prevent overflowing (see full description and Fig 2 in Pitois et al., 2016). When activated, the system pumps sea water from a depth of 4m at rates of approximately 40 L/min and distributes the water into one or more of the six possible traps. Each trap consists of a PVC cylinder (height: 73.3 cm, diameter: 28.0 cm) containing a plankton net (length 66.0 cm and diameter 26.5 cm) of chosen mesh size. During the current survey, the samples were filtered through an 80 micron mesh net, identical to that of the ring net. The volume of water filtered was measured with an electronic flowmeter, so that zooplankton abundance (m cubed) could be determined for each sample. Sampling started while steaming at a fixed vessel speed of 10 knots, 20 min before arrival at the ring net station, continued during the deployment of the ring net at station (approximately 20 min), and was stopped 20 min after leaving the station at 10 knots vessel speed. The starting time and position, as well as end time, position and volume filtered were recorded for each station. Samples collected with the ring net and CALPS system were analysed using the Zooscan Imaging system. The PIA is a high-speed colour line scan-based imaging instrument. The flow cell is a 25mm brass tube that has two quartz optical windows halfway along its length. The flow cell at the windows is square with the same cross sectional area as the 25mm tube. A Basler 2048-70kc camera, sampling at 70k lines per second, images the water running through the flow cell. The flow rate is monitored by a Bell electro-magnetic flow meter and set to 40L/min. Colour images are captured using an EPIX E4 frame store. Raw images are stored to maximise dynamic range of the captured particles. For the purpose of consistency, the PIA was operated at the same time as the CALPS, and from the same pumped clean water supply, thus providing zooplankton information on the same body of water. Two thousand images, from a sample, were randomly selected as a subsample, analysed with the PIA for identification and validated by an expert taxonomist manually. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Zooplankton |
| 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 | 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 | 51.5 |
| East | The eastern-most limit of the data resource in decimal degrees | -3.5 |
| South | The southern-most limit of the data resource in decimal degrees | 49.25 |
| 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 | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| data.manager@cefas.co.uk | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://data.cefas.co.uk/view/18541 |
| 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. | 2017-05-16 |
| Date of last revision | The most recent date that the resource was revised. | 2024-07-12 |
| Date of creation | The date that the resource was created. | 2017-05-11 |
| 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. | 2024-07-12 |
| 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 |