Changes in species fishing mortality when using dynamic effort

[siem...@gmail.com]

Hi everyone,

 

I want to run some simple scenarios where fishing pressure of 1 species increases with e.g. 30% or decreases with 30%. My fishing, however, is modelled using the dynamic fishing (effortmodel 3 - prescribed spatial effort matrices). So in my understanding, then fishing mortality is not regulated based on the species, but based on the gears. How do I run a scenario where I want the fishing mortality of 1 species to change?

Do I use the parameters of 'changes in catchability' for that specific species? And then use Qchange_mult 0.3 or -0.3?

 

Thanks,

Sieme