Chapter 2 dataset - Read me file
Site_ID	
Unique ID code given to each experimental site to enable identification and inter year comparison

Mean_Area
Area (m2) of each experimental site	

5_min_%_area	
Percentage of the total experimental site area covered in the 5-minute time-delineated survey 
component

5_min_area
Area (m2) of the total experimental site covered in the 5-minute time-delineated survey component

5_min_Fry	
Number of Atlantic salmon fry recorded in the 5-minute time-delineated survey component, 
inclusive of captured and missed fish 

5_min_density
Density (fish m-2) of Atlantic salmon fry recorded in the 5-minute time-delineated survey component, 
inclusive of captured and missed fish 	

5_min_BT_Fry
Number of brown trout fry recorded in the 5-minute time-delineated survey component, inclusive of 
captured and missed fish 	

5_min_S_Parr
Number of Atlantic salmon parr recorded in the 5-minute time-delineated survey component, 
inclusive of captured and missed fish 	

5_min_BT
Number of brown trout in the 1+ (parr) and older age classes recorded in the 5-minute time-
delineated survey component, inclusive of captured and missed fish 	

Year
Year in which the electrofishing survey was completed	

Year_factor
Year in which the electrofishing survey was completed, converted to a letter code for statistical 
analyses	

Sampling_period
Sampling period (Spring or Autumn) in which the electrofishing survey was completed

0+_salmon
Number of Atlantic salmon fry recorded in the overall area-delineated survey, inclusive of captured 
and missed fish 	

0+_salmon_density	
Density (fish m-2) of Atlantic salmon fry recorded in the overall area-delineated survey, inclusive of 
captured and missed fish

Julday	
Julian day on which an electrofishing survey was completed

Median_Substrate_Size	
Median substrate size of particles measured during Wolman pebble counts

Mean_Substrate_Size	
Mean substrate size of particles measured during Wolman pebble counts

sand_proportion
Proportion of sand and silt (diameter; D =< 2 mm) particles measured during Wolman pebble counts

gravel_proportion	
Proportion of gravel (2 < D =< 64mm) particles measured during Wolman pebble counts

cobble_proportion
Proportion of cobble (64 < D =< 256 mm) particles measured during Wolman pebble counts

boulder_proportion	
Proportion of boulder and bedrock (D > 256 mm) particles measured during Wolman pebble counts

Macrophyte_proportion
Proportion of stream area covered by macrophytes, as measured during Wolman pebble counts

Mean_Depth
Mean depth (m) of experimental sites	

Flow
Flow level during electrofishing surveys, classed as 'Low' or 'Normal'