Future needs for Stock Synthesis

Last years requests

• See website (http://www.fisheriesstockassessment.com/TikiWiki/tiki-index.php?page=Report+from+the+SS2+Tutorial+2007)

• Most requests were implemented

This years requests

• See website (http://www.fisheriesstockassessment.com/TikiWiki/tiki-index.php?page=Future+needs+for+Stock+Synthesis+2008)

Rick’s to do list• TO-DO list• revised input of Tag parameters• MCMC output• Catch cap in forecast (may cause derivative problem)• F implementation error • wtfreq and tag output in nudata• Fishery sector designation (comm vs recr)• read empirical size-at-age• read empirical body wt-at-age• rebuilder output• SIS output• neg binomial like fxn for survey observations better male selex

options

Request from Rick Methot• Currently for movement:

1. user specifies which GP, seas, source, dest combinations will havemovement2. parameters are required for each combination selected

Shortcomings:1. movement cannot be gender specific2. movement rates in a multi-area model cannot be sharedAre these shortcomings a big deal for you, or just a minor hindrance?

Possible Solution:1. add gender as a condition for specifying movement2. add a code for selected movement pattern to each condition3. then only need to create movement parameters for the N movement patterns4. this will allow, for example, males and females for a particularsource - dest to share the same movement parameters, or not. Also wouldallow movement rate between area 1 and 3 to share same movementparameters as are used between areas 1 and 2.

Similarly for the tag-recapture parameters, I could revise so that youwould create a list of unique tag mortality parameters, tag reportingparameters, tag dispersion parameters, etc. Then, each tag group wouldspecify which parameter it was using.

Natural mortality (see worksheet)

aa s

MM min

Where sa is the same as the 6 parameter selectivity curve

Other suggestions?