Converting from kill at age to retained at age - Public Forums - Stock Synthesis

The retained weights at age should be available within AGE_SELEX as Factor = "sel*ret*wt". Factor = "sel*wt" would be the kill weights at age. Those quantities are not reported for every year, but should be reported for any year where there is a change in selectivity or retention or growth (though I haven't confirmed that).

Sorry, forgot to login or sign. That was my comment above. Laura, please comment again on whether that gets you what you're looking for or not. 

Replying a third time after seeing that the VLab email notifications are not yet sorted out well. My original message is repeated below:

The retained weights at age should be available within AGE_SELEX as Factor = "sel*ret*wt". Factor = "sel*wt" would be the kill weights at age. Those quantities are not reported for every year, but should be reported for any year where there is a change in selectivity or retention or growth (though I haven't confirmed that).

Actually those values like sel*ret*wt are selectivity times retention times body weight, so are not the weight of the retained fish. I realize that we do not exactly report those quantities you want.

One way to get them is to create a dummy (e.g. nil weighting) observation for body weight-at-age for retained catch of the fleet. SS will then create an expected value for that observation. The only wrinkle is that this expected value will be body weight-at-age', not at true age, because it takes ageing error into account so slightly blurs between ages.

We'll create a SS programming issue to look into reporting this quantity.

Rick