Washington sport catch 1987 - 1989

[brianlangseth-NOAA]

Decide how to fill in years 1968 - 1974 and 1987-1989 which doesn't have sport catch data. Will also need to figure out whether any catch existing before 1967 as 1967 was the first year of data.

Determine release mortalities for 2002 - 2022 (could use rates based on overall recfin values), and then determine releases (and mortalities) prior to 2002

[brianlangseth-NOAA]

2015 assessment pulled 1987-1989 values from recfin which Im not sure how because my recfin pulls for WA only go back to 2004. We could used values from last assessment, though last assessment had washington removals in MT, not numbers.

Budrick mentioned the MRFSS data includes all species and states and therefore could be used for WA in 1987-1989 possibly.

[brianlangseth-NOAA]

Planning to use linear ramps for missing WA years given its a simple assumption and the general trend in the data seem to support that choice.

For converting numbers to weights, @tsoutt provided the RecFIN weight length relationship: canary L-W: a = 1.04058E-08 b = 3.084136662 Can use this and the length comp to provide an estimate of fish in MT.

As for discards before 2002. Email exchange with Phil Anderson suggests assuming zero discards before at least 1994 would be appropriate. @tsoutt provided regulation histories for WA (see below). Regulation separated canary starting in 2000. Thus, assuming zero before 2000 can make sense but assuming zero for 2000-2001 is not as reasonable.

Canary as part of 20 lbs. plus one fish rockfish daily limit: 1954-1960 Canary as part of 15 rockfish daily limit: 1961-1991 Canary as part of 12 rockfish daily limit: 1992-1994 Canary as part of 10 rockfish daily limit: 1995-1999 2 Canary per day: 2000 -2002 1 Canary per day: 2003 No Canary retention: 2004-2016 1 Canary per day: 2017 2 Canary per day:2018 Canary as part of 7 rockfish daily limit: 2020 to current

[brianlangseth-NOAA]

@EJDick-NOAA provides a link to an old CRFS report in the california-data repo Recreational data #2 discussion. There estclaim is the estimate of A and estharv is the estimate of B1, both in numbers.

Unfortunately, there is no value for ESTHARV from 1993 - 2001. MRFSS data is therefore not going to help us.

[EJDick-NOAA]

@brianlangseth-NOAA my experience with WDFW is that they do not want to use MRFSS-era catch estimates. They have catch estimates from a state-run survey, and Theresa Tsou (Tien-Shui.Tsou@dfw.wa.gov) is the best contact for those data. @shcaba Jason is familiar with WDFW rec data, too.

[brianlangseth-NOAA]

Given that the regulations above show 2000-2002 have the same bag limit, and that MRFSS and RecFIN data aren't able to help inform discards for 2000-2001, I plan to assume the same release rate in 2000-2001 as for 2002. Plotting this shows, the releases rate in 2002 is quite different than when under no retention starting in 2004.

I also plan to use the same discard rate (by depth) as used for 2002, which was the average of 2005-2007. Plotting this shows comparable levels as 2017-2022. The averages in both time periods are similar, 0.433 for 2005-2007 versus 0.417 in 2017-2022.

[brianlangseth-NOAA]

Updated 1987-1989 values based on new form CTE503 in recfin for washington historical catches (areas 1-4). Theresa says that she cant find documentation for these values but that they were provided by previouse staff member of WDFW.