calc_smolt

Calculate smolt production from base stock-recruit parameters and fitness loss

Simulation tools to evaluate the long-term effects of salmon management strategies, including a combination of habitat, harvest, and
habitat actions. The stochastic age-structured operating model accommodates complex life histories, including freshwater survival across
early life stages, juvenile survival and fishery exploitation in the marine life stage, partial maturity by age class, and fitness impacts of
hatchery programs on natural spawning populations. 'salmonMSE' also provides an age-structured conditioning model to develop operating models
fitted to data.

Quang Huynh

salmonMSE

Management Strategy Evaluation for Salmon Species

calc_smolt function

<dl><dt>N1</dt>
<dd>Egg production for the density-independent component of the stock-recruit relationship. Can be the number of spawners if <code>phi = 1</code>
and <code>Smax</code> is in units of spawners.</dd>
<dt>N2</dt>
<dd>Egg production for the density-dependent component of the stock-recruit relationship (only used if <code>per_recruit = FALSE</code>)</dd>
<dt>kappa</dt>
<dd>Base productivity parameter</dd>
<dt>capacity</dt>
<dd>Base capacity parameter if <code>SRrel = "BH"</code></dd>
<dt>Smax</dt>
<dd>Base Smax parameter if <code>SRrel = "Ricker"</code></dd>
<dt>phi</dt>
<dd>Unfished egg per smolt (<code>1/phi</code> is the replacement line)</dd>
<dt>fitness_loss</dt>
<dd>Survival term to reduce smolt production due to fitness, between 0-1</dd>
<dt>SRrel</dt>
<dd>Character for the stock-recruit function</dd>
<dt>per_recruit</dt>
<dd>Logical, whether N1 is a per recruit quantity (TRUE) or in absolute numbers (FALSE)</dd></dl>

Arguments

Smolt production — calc_smolt

<dl>

<dt>N1</dt>
<dd>Egg production for the density-independent component of the stock-recruit relationship. Can be the number of spawners if <code>phi = 1</code>
and <code>Smax</code> is in units of spawners.</dd>


<dt>N2</dt>
<dd>Egg production for the density-dependent component of the stock-recruit relationship (only used if <code>per_recruit = FALSE</code>)</dd>


<dt>kappa</dt>
<dd>Base productivity parameter</dd>


<dt>capacity</dt>
<dd>Base capacity parameter if <code>SRrel = "BH"</code></dd>


<dt>Smax</dt>
<dd>Base Smax parameter if <code>SRrel = "Ricker"</code></dd>


<dt>phi</dt>
<dd>Unfished egg per smolt (<code>1/phi</code> is the replacement line)</dd>


<dt>fitness_loss</dt>
<dd>Survival term to reduce smolt production due to fitness, between 0-1</dd>


<dt>SRrel</dt>
<dd>Character for the stock-recruit function</dd>


<dt>per_recruit</dt>
<dd>Logical, whether N1 is a per recruit quantity (TRUE) or in absolute numbers (FALSE)</dd>

</dl>

calc_smolt: Smolt production

Description

Usage

Value

Arguments