make_maxage: Make maximum age for population using built-in data sets.

In danStich/anadrofish: Anadromous Fish Population Responses to Habitat Changes

Make maximum age for population using built-in data sets.

Description

The purpose of this function is to query the maximum age in the selected river from built-in data set containing region-specific max_ages and.

Usage

make_maxage(
  river,
  sex = c("female", "male"),
  species = c("AMS", "ALE", "BBH"),
  custom_habitat = NULL
)

Arguments

river	River for which maximum age is needed.
sex	Sex of fish. If not specified, then mean of male and female maximum ages is returned for American shad, or pooled sex data used for river herring.
species	Species for which population dynamics will be simulated. Choices include American shad ("AMS"), alewife ("ALE"), and blueback herring ("BBH").
custom_habitat	A dataframe containing columns corresponding to the those in the output from custom_habitat_template. The default, NULL uses the default habitat data set for a given combination of species and river.

Value

A numeric vector of length = 1 containing maximum age of fish in population.

Source

Atlantic States Marine Fisheries Commission

References

Atlantic States Marine Fisheries Commission (ASMFC). 2020. American shad benchmark stock assessment and peer-review report. ASMFC, Arlington, VA.

Atlantic States Marine Fisheries Commission. 2024. River herring benchmark stock assessment and peer-review report. ASMFC, Arlington, VA. URL: https://asmfc.org/uploads/file/66f59e40RiverHerringAssessment_PeerReviewReport_2024.pdf

Examples

make_maxage(river = "Susquehanna", species = "AMS")

danStich/anadrofish documentation built on Jan. 17, 2025, 9:46 a.m.