bristol_bay_sockeye: Bristol Bay Sockeye Abundance and Forecasts

In nwfsc-timeseries/atsalibrary: Packages, data and scripts for ATSA course and lab book

Bristol Bay Sockeye Abundance and Forecasts

Description

Bristol Bay sockeye abundance for 9 rivers for 4 age-groups. The data are from Ovando et al 2021 Improving forecasts of sockeye salmon (Oncorhynchus nerka) with parametric and nonparametric models DOI: 10.1139/cjfas-2021-0287. You’ll find a copy in the lab folder. The data file also has the covariates for year that the smolts enter the ocean as used in Ovando et al. The dataset includes climate covariates.

Usage

data(bristol_bay_sockeye)

Format

Objects of class "data.frame".

Details

The data have the columns:

• ret_yr The year the spawners return to the spawning grounds

• ret The returns (number of fish in 1000s)

• system The river name

• age_group The age_group

• forecast.adfw The forecast from AK Fish and Wildlife

• forecast.fri The forecast from UW Fisheries Research Institute

• env_* are some covariates at the year the age group entered the ocean

In the data file, the age group designation is “a.b” where “a” is number of years in freshwater and “b” is number of years in the ocean. The age of the spawners in then a+b.

Source

DanOvando GitHub repo

Daily escapement counts, Bristol Bay, Alaska, 1955-2017 archived on KNB

References

Ovando et al 2021 Improving forecasts of sockeye salmon (Oncorhynchus nerka) with parametric and nonparametric modelDOI: 10.1139/cjfas-2021-0287

Examples

data(bristol_bay_sockeye)
bb_sockeye %>% 
filter(system=="Kvichak") %>% 
  ggplot(aes(x=ret_yr, y=log(ret))) + 
    geom_line() + 
    ggtitle("log abundance by age group") +
    facet_wrap(~age_group)

nwfsc-timeseries/atsalibrary documentation built on June 15, 2025, 2:18 a.m.