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Southern bluefin tuna assessment objective

Source: R/model.R
sbt_model.Rd

Computes the joint negative objective for the southern bluefin tuna (SBT) assessment. It combines population dynamics, observation likelihoods, process and selectivity priors, the preventive harvest wall, and the positive-survival feasibility continuation.

Usage

sbt_model(parameters, data)

Arguments

parameters

Named list of model parameters, normally returned by get_parameters() and modified through an RTMB parameter map.

data

Prepared model-data list returned by get_data().

Value

A scalar joint negative objective value on the RTMB tape.

Details

data$M_switch = 1 uses the four direct log-mortality anchors M0, M4, M10, and M30. M_switch = 2 uses get_M_length(), with M10 and M30 estimated and the length exponent par_mc normally fixed by get_map(). All harvest-wall fields are explicit model data; get_data() supplies their defaults before this objective is built. Reported likelihood components are negative log contributions, even where their historical names begin with lp_.