Edit dynamic B0 text/caption

doc/025-dynamic-bo.Rmd

@@ -1,11 +1,9 @@
 ```{r dynamic-bo-en, eval = !fr(), results = 'asis'}
 cat("## DYNAMIC $B_0$ {#dynamic-bo}
 
-A dynamic $B_0$ was calculated in R using the mean parameter values and expanded to include the two-fleet, two-sex catch-at-age model. The fishing mortality was set to zero and all mean parameter estimates were included. Figure \@ref(fig:fig-dynamic-b-zero) shows the estimated biomass trajectories for this case.
-
-The biomass calculated using a dynamic $B_0$ approach is significantly higher for all years than using a non-dynamic $B_0$ produces.
-
-This work was done at the request of the review meeting participants, after the initial draft of this stock assessment.")
+A dynamic $B_0$ was calculated by recreating the population dynamics model in R with parameter estimates from the fitted base model. The fishing mortality was set to zero but estimated recruitment deviations were included. Figure \@ref(fig:fig-dynamic-b-zero) shows the estimated dynamic $B_0$ from this exercise.
+This figure illustrates that the model explains a portion of the recent decline by a sequence of poor recruitment.
+")
 ```
 
 ```{r dynamic-bo-fr, eval = fr(), results = 'asis', needs_trans = FALSE}
@@ -16,4 +14,4 @@ Un $B_0$ dynamique a été calculé dans R à l'aide des valeurs moyennes des pa
 La biomasse calculée en utilisant une approche dynamique $B_0$ est significativement plus élevée pour toutes les années qu'en utilisant une approche non dynamique $B_0$.
 
 Ce travail a été réalisé à la demande des participants à la réunion d'examen, après la première version de cette évaluation du stock.")
-```
+```

doc/060-figures-main.Rmd

@@ -136,7 +136,7 @@ plot_biomass_mcmc(base_model,
                   ylim = c(0, 1.3))
 ```
 
-(ref:fig-dynamic-b-zero-en) Relative spawning biomass of the base model (black line) compared to relative spawning biomass of the base model calculated using a dynamic $B_0$ (blue). The black line is not exactly equal to the `r iscam` model output median line as seen in Figure \@ref(fig:fig-base-depletion) because this figure was created fairly quickly using a mini-iscam model to emulate iSCAM in R.
+(ref:fig-dynamic-b-zero-en) Relative spawning biomass of the base model (black line) compared to relative spawning biomass of the base model calculated with fishing mortality set to zero but estimated recruitment deviations, i.e. a dynamic $B_0$ (blue). The black line is not exactly equal to the `r iscam` model output median line as seen in Figure \@ref(fig:fig-base-depletion) because this figure was created with a separate code base using only mean parameter estimates from the fitted base model as an approximation illustration.
 
 (ref:fig-dynamic-b-zero-fr) Biomasse de frai relative du modèle de base (ligne noire) comparée à la biomasse de frai relative du modèle de base calculée à l'aide d'un $B_0$ dynamique (bleu). La ligne noire n'est pas exactement égale à la ligne médiane de sortie du modèle `r iscam` telle qu'elle apparaît dans la figure \@ref(fig:fig-base-depletion) parce que cette figure a été créée assez rapidement en utilisant un modèle mini-iscam pour émuler iSCAM dans R.