Sockeye salmon brood tables, Fraser River, Canada, 1948-2015

Brood tables, also called run reconstructions, utilize annual estimates of the total run (commercial catch plus escapement), and samples of ages, to estimate the number of recruits per age class produced from a given brood year or group of spawners. These data are useful for salmon biologists to understand the productivity and carrying capacity of salmon populations, changes in salmon survival over time, and life histories. These data can come in a number of different formats, but generally follow the pattern of: rows for each brood year, and columns for the estimated number of fish that returned in each age class. This dataset consists of reformatted sockeye salmon brood tables for multiple Sockeye salmon stocks from the Fraser River watershed in Canada. Age classes are given in European Notation, where the first number is the number of winters spent in freshwater before going to sea (1 winter in freshwater = age-1.X), and the second number is the number of winters spent at sea (3 winters at sea = age-X.3). Estimates of spawners in this brood table are "effective females" which are the product of the number of female spawners and spawner success (the proportion of eggs successfully spawned), based on spawning ground carcass surveys.