Make instantaneous natural mortality.
make_mortality.Rd
The purpose of this function is to query the
instantaneous natural mortality (regional estimates)
for the selected river from built-in data set containing
region-specific mortality
for American shad or
mortality_rh
for river herring.
Arguments
- river
River for which maximum age is needed.
- sex
Fish sex. If
NULL
(default) or"Pooled"
, then mean of male and female estimates is used.- 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 ofspecies
andriver
.
Value
A numeric vector of length = 1
containing
natural instantaneous mortality of fish in population.
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