The Burrishoole traps (on the Salmon leap and the Mill race) in Co. Mayo Ireland, capture every fish that migrates from the freshwater portion of the Burrishoole catchment to the sea, and are situated between Lough Feeagh and Lough Furnace. The traps are emptied every day, and fish are manually counted and released downstream. This dataset comprises the daily counts of salmon smolts (Salmo salar), trout smolts (Salmo trutta) and silver eel (Anguilla anguilla) from 1970 to 2019. Data have undergone QA/QC and checked for erroneous entries. More recent data can be requested or downloaded from the Marine Institute through www.marine.ie. Additional information can be obtained from burrishooleLTER@marine.ie

The Burrishoole fish traps have the following locations: Salmon leap: 53.920323, -9.584348 and Mill Race: 53.924081, -9.571727. As records do not specify which trap the specimens were sampled in, a midpoint of 53.922202 -9.578038 has been applied as the location data in the data distribution.