04/27/2015

Distribution of bottom trawl catches

Distribution of long line catches

Surveys - total biomass index

Surveys - age based indices

Survey weights

Catch weights

Log catch ratio

Current assessment setup

  • Data:
    • Catch at age from 1955-2014, age groups 3-14.
    • Spring survey indices at age from 1985-2015, age groups 1-10.
    • Fall survey indices at age from 1996-2014 (no survey in 2011), age groups 1-10.
  • Model: A forward running statistical catch at age model where fishing mortality at age is allowed to change gradually in time (random walk).
  • Link equation \(U_{ay} = q_aN^{\beta_a}_{ay}\):
    • Power function for age groups 1-5, linear for age groups 6-10.
  • in use since 2002
  • Fall survey added to the tuning in the 2010 assessment.

2015 assessment - stock summary

2014 assessment - survey residuals

2014 assessment - retrospectives

adcam - different survey combinations

Survey residuals - single survey tuning

Retros on different survey tunings

Retros on different survey tunings - relative to 2014 runs