Survey data from the Alaska and Northwest Fishery Science Centers

Various processed survey datasets.

biomass

parameters

specimens

length_comps

age_comps

Format

biomass: Design-based biomass estimates. A data frame.

parameters: Estimated growth parameters. A list of two data frames.

region: U.S. region.
common_name: Species common name.
sex: Sex (Female, Male, Unsexed).
k: Estimated von Bertanlaffy growth rate.
Linf: Estimated maximimum size in cm.
L0: Estimated minimum size at in cm.
CV1: Estimated coefficient of variation around L0.
CV2: Estimated coefficient of variation around Linf.
median_intercept: Median values for the length-mass intercept parameter (A).
SD: Estimated standard deviation for length-mass relationship.
A: Length-mass intercept A (A * length_cm ^ B).
B: Length-mass exponential parameter B (A * length_cm ^ B).

specimens: Biological data. A data frame.

length_comps: Expanded length comps. A data frame.

science_center: Name of the U.S. Science Center.
region: U.S. region.
area: Survey name indicating the region of the data.
common_name: Species common name.
scientific_name: Species scientific name.
year: Year.
sex: Sex (Female, Male, Unsexed).
length_cm: Length of fish in cm.
population_count: Expanded observations by length.
total: Sum of the expanded length observations by year across all sexes.
propotion: Proportion of observations by length and sex that sums to 100 for each year across all observed sexes.

age_comps: Expanded age comps. A data frame.

science_center: Name of the U.S. Science Center.
region: U.S. region.
area: Survey name indicating the region of the data.
common_name: Species common name.
scientific_name: Species scientific name.
year: Year.
sex: Sex (Female, Male, Unsexed).
age_years: Age of the fish in years.
population_count: Expanded observations by age.
total: Sum of the expanded age observations by year across all sexes.
propotion: Proportion of observations by age and sex that sums to 100 for each year across all observed sexes.