© OpenStreetMap contributors
- Add External Layer
- Upload Shapefile
- Layer Tutorial
- 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
(ctrl+c)
Search for marine data across UK organisations
- API
- How-To
- About
- Contact MEDIN
- Share
Metadata: Assessing the status of Atlantic salmon (Salmo salar) from juvenile electrofishing data collected under the National Electrofishing Programme for Scotland (NEPS)
Abstract:
Atlantic salmon (Salmo salar) are a species of high cultural, conservation and economic importance that are worth ca. £80 million per annum to the Scottish economy. Quantitative and scientifically defensible assessments of population status are required to inform evidence based fisheries management across a range of spatial scales. Juvenile electrofishing data are one of the most commonly collected sources of information on the status of Atlantic salmon in Scotland. However, their interpretation is fraught with technical challenges that include the need to 1) estimate salmon densities from electrofishing count data 2) develop a suitable “benchmark” against which to compare observed densities 3) obtain appropriate (representative) annual monitoring data 4) develop approaches that allow site-wise estimates of observed and benchmark densities to be scaled to larger areas. This report presents an approach for assessing the status of Atlantic salmon in Scotland from juvenile electrofishing data.
Data holder:
Scottish Government (Marine Scotland)
Use constraints:
no limitations to public access
| Other details | ||
| Internal code | Internally assigned metadata identifier | 3879 |
| 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. | Assessing the status of Atlantic salmon (Salmo salar) from juvenile electrofishing data collected under the National Electrofishing Programme for Scotland (NEPS) |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | Scottish Marine and Freshwater Science Vol 10 No 2 |
| 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. | Marine_Scotland_FishDAC_12203 |
| Resource Identifier | This is the code assigned by the data owner. | Marine_Scotland_FishDAC_12203 |
| 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 | 1997-01-01 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2018-12-31 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | 200.00 |
| Spatial resolution unit | This describes the unit of spatial resolution which for distance must be metres. | http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/uom/gmxUom.xml#m |
| 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'. | unknown |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | Atlantic salmon (Salmo salar) are a species of high cultural, conservation and economic importance that are worth ca. £80 million per annum to the Scottish economy. Quantitative and scientifically defensible assessments of population status are required to inform evidence based fisheries management across a range of spatial scales. Juvenile electrofishing data are one of the most commonly collected sources of information on the status of Atlantic salmon in Scotland. However, their interpretation is fraught with technical challenges that include the need to 1) estimate salmon densities from electrofishing count data 2) develop a suitable “benchmark” against which to compare observed densities 3) obtain appropriate (representative) annual monitoring data 4) develop approaches that allow site-wise estimates of observed and benchmark densities to be scaled to larger areas. This report presents an approach for assessing the status of Atlantic salmon in Scotland from juvenile electrofishing data. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Observed salmon counts were obtained from the National Electrofishing Programme for Scotland (NEPS), an unequal probability Generalised Random Tessellation Stratified (GRTS) survey design with 27 strata (assessment regions). Capture probabilities were modelled from available multi-pass electrofishing data collected between 1997 and 2018 and used to predict densities of salmon fry and parr for 1-pass and 3-pass NEPS electrofishing sites. Observed abundances from NEPS were then compared to a recently published juvenile salmon density benchmark at site, catchment, regional and national scales to determine salmon performance and status. A rule based approach was used to classify regional electrofishing data into three grades based on performance against the regional benchmark and uncertainty in the mean observed regional densities. Further work is required to investigate, and where possible harmonise, the outputs of this juvenile assessment approach with existing adult based assessment methods used to classify the status of Scotland’s salmon rivers under Conservation Regulations. A number of future developments are identified to improve models of capture probability and benchmark density. Future developments of NEPS should consider current and future monitoring requirements at national and local scales, alongside available resources to improve the overall survey design. |
| 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 | Fish abundance in water bodies | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 61.10546 |
| East | The eastern-most limit of the data resource in decimal degrees | 1.450195 |
| South | The southern-most limit of the data resource in decimal degrees | 54.85688 |
| West | The western-most limit of the data resource in decimal degrees | -10.2832 |
| 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 | Scottish Government (Marine Scotland) | |
| Phone | +44 (0)300 244 4000 | |
| marinescotland@gov.scot | ||
| 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 | Scottish Government (Marine Scotland) | |
| Phone | +44 (0)300 244 4000 | |
| Delivery point | Mailpoint 11, Area 1B South, Victoria Quay | |
| Postal code | EH6 6QQ | |
| City | Edinburgh | |
| Country | United Kingdom | |
| marinescotland@gov.scot | ||
| 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 | Scottish Government (Marine Scotland) | |
| Phone | +44 (0)300 244 4000 | |
| Delivery point | Mailpoint 11, Area 1B South, Victoria Quay | |
| Postal code | EH6 6QQ | |
| City | Edinburgh | |
| Country | United Kingdom | |
| marinescotland@gov.scot | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Scottish Government (Marine Scotland) | |
| Phone | +44 (0)300 244 4000 | |
| Delivery point | Mailpoint 11, Area 1B South, Victoria Quay | |
| Postal code | EH6 6QQ | |
| City | Edinburgh | |
| Country | United Kingdom | |
| marinescotland@gov.scot | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Marine Scotland | |
| iain.malcolm@gov.scot | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Marine Scotland | |
| karen.millidine@gov.scot | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Marine Scotland | |
| faye.jackson@gov.scot | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://dx.doi.org/10.7489/12203-1 |
| Locator function | Code that describes the function of the resource. ISO function code chosen from ISO 19115-1 Codelist | DOI:https://dx.doi.org/10.7489/12203-1 |
| Dataset constraints | ||
| 20 Limitations on Public Access - Access constraints | otherRestrictions | |
| 20 Limitations on Public Access - Other constraints | This states any limitations on access to the data and uses free text. | no limitations to public access |
| 21 Conditions for Access and Use - Use limitation | 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. | The following attribution statement must be used: Contains information from the Scottish Government (Marine Scotland) licensed under the Open Government Licence v3.0. |
| 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. | 2019-05-15 |
| 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. | 2019-07-10 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery Metadata |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | Version 2.3.7 |