Yelloweye assessment - fleet 6 catchability treatment

[gertsevv]

Following today's discussion on how to fit index for fleet 6 better, I ran several model runs.

Block for fleet 6 catchability is updated from 2004 forward (instead of 2005 forward)
Block is updated plus float option for fleet 6 is set =0 (no float option)
The fit to fleet 6 index is much improved in no float run. The model outputs are similar for all models, but the run with no float option bringing stock a little closer to 40% target. See figures below.

I am attaching control files I used for both runs.

yelloweye_control_block_updated.ss.txt
yelloweye_control_block_updated_nofloat.ss.txt

[rclairer]

@gertsevv, I see that you also changed the phase from -1 to 1, correct?

[gertsevv]

@rclairer yes, this is correct (see Aaron comment on that). I am puzzled why 2017 settings worked back then, but did not this year. Now, I would repeat the run with no float (with phase positive), confirm the results, go over all the r4ss plots of that model to make sure that other fits did not deteriorate. Then, make a decision on whether to switch to that new formulation as a new base.

[rclairer]

Just to clarify, your comment here is for us to have float = 0 and phase = 1, and that is what we should move forward with?

[gertsevv]

Correct.

[gertsevv]

We do not change phase, we just remove negative sign. it was -1 and now it is 1

[aaronmberger-nwfsc]

That's correct, so the no float model will have one additional parameter compared to your previous model.

…

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