© OpenStreetMap contributors
- Add External Layer
- Upload Shapefile
- Close
Use the checkbox () to show or hide a layer.
Use the radio buttons () to select a layer to use with the identify function.
- Layers
- Opacity
Available layers
Search for marine data across UK organisations
- How-To
- About
- Contact MEDIN
- Share
Metadata: Selectivity of hake gill nets in the Southwest fishery 2005/06 - Fisheries Science Partnership
Abstract:
To examine the catch composition and selectivity of a range of static gears for hake in the southwest fisheries. FSP Programme 8 demonstrated the selectivity characteristics of 120mm mesh gill nets used by UK hake fishermen off the south west coast of England. The experiment was carried out by comparing the catches in nets of mesh size 80, 100, 120 and 140mm deployed simultaneously at two fishing grounds. Additional 120mm nets were shot to obtain further data on size composition of hake. The work was carried out in October and November 2005, using the vessel *Carol H.*
Data holder:
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
Other details | ||
Internal code | Internally assigned metadata identifier | 10601 |
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. | Selectivity of hake gill nets in the Southwest fishery 2005/06 - Fisheries Science Partnership |
Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | FSP Selectivity of hake gill nets in the Southwest fishery |
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. | CEFASac7ba728-2ade-49f1-860a-9cf997c41bd5 |
Resource Identifier | This is the code assigned by the data owner. | CEFAS625 |
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 | 2005-10-08 |
End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2005-11-14 |
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. | To examine the catch composition and selectivity of a range of static gears for hake in the southwest fisheries. FSP Programme 8 demonstrated the selectivity characteristics of 120mm mesh gill nets used by UK hake fishermen off the south west coast of England. The experiment was carried out by comparing the catches in nets of mesh size 80, 100, 120 and 140mm deployed simultaneously at two fishing grounds. Additional 120mm nets were shot to obtain further data on size composition of hake. The work was carried out in October and November 2005, using the vessel *Carol H.* |
Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | The project objectives were addressed primarily through analysis of length frequency data. The length frequencies reflect a combination of the selectivity characteristics of the gear and the abundance of fish of different sizes present at the times and locations where the gear is fished. The selectivity of the gear can be represented by a curve showing the probability of fish of different sizes being caught when they try to escape the gear. In the case of a gill net where the majority of fish become gilled or wedged in the meshes, the curve is often bell shaped, with the peak corresponding to the sizes of fish most likely to be enmeshed. If additional fish are caught by entanglement (e.g. by teeth in the case of hake), the selection curve may cover a broader range of lengths or even have more than one length mode. When estimating the shape of the hake gill net selectivity curves, the variations in abundance of fish of different sizes around the net have to be considered. For enmeshing gears such as gill nets, the normal approach is to hang fleets of nets of different mesh but otherwise identical construction, and to compare the length frequencies in each. This approach was adopted for this FSP project. |
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 | 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 | |
Geographical coverage | ||
North | The northern-most limit of the data resource in decimal degrees | 52 |
East | The eastern-most limit of the data resource in decimal degrees | -3 |
South | The southern-most limit of the data resource in decimal degrees | 49.5 |
West | The western-most limit of the data resource in decimal degrees | -8 |
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 | |
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 | |
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 | |
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 | |
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) | |
Role | The owner is the person or organisation that owns the resource. | owner |
Organisation name | Department for Environment, Food and Rural Affairs (DEFRA) | |
Resource locators | ||
Locator URL | Web address (URL) that links to the resource | https://data.cefas.co.uk/view/625 |
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/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/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. | 2014-12-05 |
Date of last revision | The most recent date that the resource was revised. | 2023-11-21 |
Date of creation | The date that the resource was created. | 2012-10-24 |
Harvest date | The date which this record has been (re)harvested from the provider. | 2024-04-21 |
Metadata date | The date when the content of this metadata record was last updated. | 2023-11-21 |
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 |