National Electrofishing Programme for Scotland (NEPS) 2023: status of juvenile Atlantic salmon and brown trout populations
The National Electrofishing Programme for Scotland (NEPS) is a statistical survey of freshwater fish populations and the pressures affecting them in Scotland, particularly water quality and genetic introgression. This report presents the latest analysis including data from 2023.
Acknowledgements
There are many to thank for the success of NEPS, which has been a strong collaboration, over a number of years.
NEPS 2018 field data collection was supported by funding from the Marine Directorate of Scottish Government, SEPA and Nature Scot. NEPS 2019 and NEPS 2021 field data collection were funded by the Marine Directorate of Scottish Government and Crown Estate Scotland. NEPS 2023 was funded by Marine Directorate of Scottish Government.
The NEPS survey design, project management, data analysis and reporting were funded by Marine Directorate of Scottish Government under Service Level Agreement (SLA) FW02g.
Karen Millidine, Ross Glover and Phillip Bacon are thanked for their substantial contributions to previous NEPS surveys, including method development, survey design, data collation and quality control.
Alistair McCartney, Janey Keay, Caro Middlemas, Pauline Proudlock, Denise Stirling and Jill Watson are thanked for logistical support and expert water quality analyses.
Stephen McLaren and John Muir are thanked for their assistance with data entry, quality control and upload across FishObs Data Processing Utility (DPU) and FishObs Database.
John Muir and Jill Watson are thanked for scale impressing. Stephen McLaren, John Muir, Denise Stirling and Aya Thorne are thanked for salmon scale reading.
Jamie Sampayo is thanked for logistical support, quality control and logging of genetics samples ahead of analysis.
Jens Rasmussen is thanked for technical support on the NEPS Oversample Portal and publication of DOI datasets.
Fisheries Management Scotland are thanked for their role in facilitating the management of NEPS in 2021 and 2023.
We would like to thank Michael Dumelle and developers at spsurvey for maintaining, improving and supporting the package used to design and analyse data from NEPS and for responding to queries as they arose.
The following collaborating organisations are thanked for their valuable efforts in facilitating or delivering data collection for NEPS 2018: West Sutherland Fisheries Trust; Northern District Salmon Fishery Board; Caithness District Salmon Fishery Board; Helmsdale District Salmon Fishery Board; Brora District Salmon Fishery Board; Kyle of Sutherland Fisheries Trust; Cromarty Firth Fisheries Trust; Ness and Beauly Fisheries Trust; Findhorn, Nairn and Lossie Trust; Spey Foundation; The Deveron, Bogie & Isla Rivers Charitable Trust; Ugie District Salmon Fishery Board; Ythan District Fishery Board; River Dee Trust; The Esk Rivers & Fisheries Trust; Tay District Salmon Fisheries Board; Forth Fisheries Trust; Tweed Foundation; The River Annan Trust; Nith Catchment Fisheries Trust; Galloway Fisheries Trust; Ayrshire Rivers Trust; Clyde River Foundation; Loch Lomond Fisheries Trust; Argyll Fisheries Trust; Lochaber Fisheries Trust; Skye & Wester Ross Fisheries Trust; Outer Hebrides Fisheries Trust; Waterside Ecology Independent Ecological Consultants.
The following collaborating organisations are thanked for their valuable efforts in facilitating or delivering data collection for NEPS 2019: West Sutherland Fisheries Trust; Northern District Salmon Fishery Board; Caithness District Salmon Fishery Board; Helmsdale District Salmon Fishery Board; Brora District Salmon Fishery Board; Kyle of Sutherland Fisheries Trust; Cromarty Firth District Salmon Fishery Board; Ness and Beauly Fisheries Trust; Findhorn, Nairn and Lossie Trust; Nairn District Salmon Fishery Board; Spey Foundation; The Deveron, Bogie & Isla Rivers Charitable Trust; Ugie District Salmon Fishery Board; Ythan District Fishery Board; River Dee Trust; The Esk Rivers & Fisheries Trust; Tay District Salmon Fisheries Board; Forth Rivers Trust; Tweed Foundation; The River Annan Trust; Nith Catchment Fisheries Trust; Galloway Fisheries Trust; Ayrshire Rivers Trust; Clyde River Foundation; Loch Lomond Fisheries Trust; Argyll Fisheries Trust; Lochaber Fisheries Trust; Skye & Wester Ross Fisheries Trust; Outer Hebrides Fisheries Trust; University of the Highlands and Islands – The Rivers and Lochs Institute.
The following collaborating organisations are thanked for their valuable efforts in facilitating or delivering data collection for NEPS 2021: West Sutherland Fisheries Trust; Northern District Salmon Fishery Board; Caithness District Salmon Fishery Board; Helmsdale District Salmon Fishery Board; Brora District Salmon Fishery Board; Kyle of Sutherland Fisheries Trust; Cromarty Firth District Salmon Fisheries Board; Ness District Salmon Fishery Board; Beauly District Salmon Fishery Board; Findhorn, Nairn and Lossie Trust; Nairn District Salmon Fishery Board; Spey Foundation; The Deveron, Bogie & Isla Rivers Charitable Trust; Ugie District Salmon Fishery Board; Ythan District Fishery Board; River Dee Trust; The Esk Rivers & Fisheries Trust; Tay District Salmon Fisheries Board; Forth Rivers Trust; Tweed Foundation; Nith Catchment Fisheries Trust; Galloway Fisheries Trust; Ayrshire Rivers Trust; Clyde River Foundation; Loch Lomond Fisheries Trust; Argyll Fisheries Trust; Lochaber Fisheries Trust; Skye and Lochalsh Fisheries Trust; Wester Ross Fisheries Trust; Outer Hebrides Fisheries Trust
The following collaborating organisations are thanked for their valuable efforts in facilitating or delivering data collection for NEPS 2023: West Sutherland Fisheries Trust; Northern District Salmon Fishery Board; Caithness District Salmon Fishery Board; Helmsdale District Salmon Fishery Board; Brora District Salmon Fishery Board; Kyle of Sutherland Fisheries Trust; Cromarty Firth District Salmon Fisheries Board; Ness District Salmon Fishery Board; Beauly District Salmon Fishery Board; Findhorn, Nairn and Lossie Trust; Nairn District Salmon Fishery Board; Spey Foundation; The Deveron, Bogie & Isla Rivers Charitable Trust; Ugie District Salmon Fishery Board; Ythan District Fishery Board; River Dee Trust; The Esk Rivers & Fisheries Trust; Tay District Salmon Fisheries Board; Forth Rivers Trust; Tweed Foundation; Nith Catchment Fisheries Trust; Galloway Fisheries Trust; Ayrshire Rivers Trust; Clyde River Foundation; Loch Lomond Fisheries Trust; Argyll Fisheries Trust; Lochaber Fisheries Trust; Skye and Lochalsh Fisheries Trust; Wester Ross Fisheries Trust; Outer Hebrides Fisheries Trust
Contact
Email: neps@gov.scot