pollock_cohorts: Data to demonstrate and test cohort effects in age-structured...
In James-Thorson/VAST: Vector-Autoregressive Spatio-Temporal (VAST) Model
pollock_cohorts R Documentation
Data to demonstrate and test cohort effects in age-structured SDM
Description
Data sufficient to demonstrate how spatially varying coefficients (SVCs)
are used to represent cohort effects in a joint (age-structured)
species distribution model. Specifically using processed data
from the Alaska Fisheries Science Center bottom trawl survey
that includes a density-dependent correction (based on subsampled acoustics)
and allocated to ages using an age-length-key (ALK), where both were
conducted by Stan Kotwicki in support
Usage
data(pollock_cohorts)
Details
sampling_data data-frame of tow-specific biomass
Author(s)
Stan Kotwicki
References
Stevenson, D. E., Kotwicki, S., Thorson, J. T., Correa, G. M., and Buckley, T. 2022.
The influence of age and cohort on the distribution of walleye pollock (Gadus chalcogrammus)
in the eastern Bering Sea. Canadian Journal of Fisheries and Aquatic Sciences.
<https://doi.org/10.1139/cjfas-2021-030>
James-Thorson/VAST documentation built on Feb. 9, 2025, 9:05 a.m.
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| pollock_cohorts | R Documentation |
Data to demonstrate and test cohort effects in age-structured SDM
Description
Data sufficient to demonstrate how spatially varying coefficients (SVCs) are used to represent cohort effects in a joint (age-structured) species distribution model. Specifically using processed data from the Alaska Fisheries Science Center bottom trawl survey that includes a density-dependent correction (based on subsampled acoustics) and allocated to ages using an age-length-key (ALK), where both were conducted by Stan Kotwicki in support
Usage
data(pollock_cohorts)
Details
sampling_data data-frame of tow-specific biomass
Author(s)
Stan Kotwicki
References
Stevenson, D. E., Kotwicki, S., Thorson, J. T., Correa, G. M., and Buckley, T. 2022. The influence of age and cohort on the distribution of walleye pollock (Gadus chalcogrammus) in the eastern Bering Sea. Canadian Journal of Fisheries and Aquatic Sciences. <https://doi.org/10.1139/cjfas-2021-030>
R Package Documentation
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We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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