calculate_spawn_energy

Calculates energy lost to reproduction on a given day

internal

An implementation of the 'Fish Bioenergetics 4.0' framework
described in Deslauriers et al. (2017)
<doi:10.1080/03632415.2017.1377558>. Provides automated parameter
optimization, multi-prey diet modeling, and comprehensive energy budget
simulations for fisheries research and aquaculture applications. An
optional 'TMB' (Template Model Builder) backend delivers 10-50x speedup
in maximum likelihood estimation while maintaining full backward
compatibility. Includes species-specific parameter databases and tools
for modeling fish growth, consumption, and metabolism under varying
environmental conditions.

Hans Ttito

fb4package

'Fish Bioenergetics 4.0' Model Implementation with
High-Performance 'TMB' Backend

calculate_spawn_energy function

<dl><dt>spawn_fraction</dt>
<dd>Fraction of weight lost in reproduction (0-1)</dd>
<dt>current_weight</dt>
<dd>Current fish weight (g)</dd>
<dt>energy_density</dt>
<dd>Energy density of reproductive tissue (J/g)</dd></dl>

Arguments

Calculate spawning energy loss (Low-level) — calculate_spawn_energy

<dl>

<dt>spawn_fraction</dt>
<dd>Fraction of weight lost in reproduction (0-1)</dd>


<dt>current_weight</dt>
<dd>Current fish weight (g)</dd>


<dt>energy_density</dt>
<dd>Energy density of reproductive tissue (J/g)</dd>

</dl>

calculate_spawn_energy: Calculate spawning energy loss (Low-level)

Description

Usage

Value

Arguments