The file is structure with the following column,format, and description

river
Format: character
Description: Salmon river (Scotland)

capture
Format: character - categories
Description: Capture type: 'rod' or 'trap or net'

date
Format: date (yyyy-mm-ddThh:mm:ss)
Description: Sampling date

sea_age
Format: character - categories
Desctiption: Sea age at return to river (years): one sea-winter (1SW), two sea-winter (2SW) or three sea-winter (3SW)

smolt_age
Format: character - categories
Description: Age at river emigration: one year (S1), two years (S2), three years (S3), or four years (S4)

length
Format: numeric (2 decimal places)
Description: Length at return to river in cm

weight
Format: numeric (2 decimal places)
Description: Weight at return to river in kg

data_provider
Format: character
Description: Origin of sample collection

sal_hab_km
Format: numeric
Description: Estimated length of river (km) classified as salmon habitat (calculated following Gardiner and Egglishaw 1986; MacLean et al. 2007)

region
Format: character
Description: Salmon Fishery Statistical Region

lat
Format: numeric (decimal degrees)
Description: Latitude of river outflow